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Letters
- From Mary Congreve 27 October [1821]
- To Dear Friend 1 January 1822
- To Dear Friend 2 January 1822
- To Dear Friend 3 January 1822
- To Dear Friend 4 January 1822
- To Dear Friend 4 January 1822
- To Dear Friend 12 January 1822
- From Erasmus Alvey Darwin 25 [October 1822]
- From E. A. Darwin 14 November 1822
- From E. A. Darwin 8 December 1822
- From E. A. Darwin 5 [March 1823]
- From E. A. Darwin 18 May 1823
- From Emily Catherine Darwin [c. June 1823]
- From John Wood Warter 23 December 1824
- From E. A. Darwin [10 January 1825]
- From E. A. Darwin [17 January 1825]
- From E. A. Darwin [24 January 1825]
- From E. A. Darwin [1 February 1825]
- From E. A. Darwin [24 February 1825]
- From E. A. Darwin [8 March 1825]
- From E. A. Darwin [June 1825]
- To Robert Waring Darwin [23 October 1825]
- From Catherine Darwin [26 October 1825]
- From Catherine & Susan Darwin 4 December [1825]
- From Caroline & Susan Darwin 2 [January 1826]
- To Caroline Darwin 6 January 1826
- From Catherine Darwin 15 January [1826]
- To Susan Darwin 29 January [1826]
- From Marianne Parker [23 February 1826]
- From Caroline Darwin [27 February 1826]
- From E. A. Darwin [9 March 1826]
- From E. A. Darwin [9 March 1826]
- From Marianne Parker [c. 13 March 1826]
- From Caroline Darwin [22 March 1826]
- From Susan Darwin [27 March 1826]
- To Caroline Darwin 8 April [1826]
- From Catherine & Caroline Darwin 11 April [1826]
- From John Price [July 1826]
- From James Farley Turner [28 July 1826]
- From E. A. Darwin [29 September 1826]
- From E. A. Darwin 10 October [1826]
- From Sarah Harriet Owen 31 [December 1827]
- From Fanny Owen [January 1828]
- From Fanny Owen [late January 1828]
- From Sarah Owen 18 February [1828]
- From Fanny Owen [9 March 1828]
- From Sarah Owen 30 March [1828]
- To W. D. Fox 12 [June 1828]
- To W. D. Fox [30 June 1828]
- From Fanny Owen [July? 1828]
- To W. D. Fox [29 July 1828]
- To C. T. Whitley [10 August 1828]
- To W. D. Fox [19 August 1828]
- To John Maurice Herbert [13 September 1828]
- To W. D. Fox [October 1828]
- To J. M. Herbert [3 October 1828]
- To the Darwin Family 3 October 1828
- From Fanny Owen [26 October 1828]
- To W. D. Fox [29 October 1828]
- To E. A. Darwin 21 December 1828
- To W. D. Fox [24 December 1828]
- To W. D. Fox [7 January 1829]
- To W. D. Fox [25–9 January 1829]
- To W. D. Fox [26 February 1829]
- From John Coldstream 28 February 1829
- To W. D. Fox [15 March 1829]
- To W. D. Fox 1 April [1829]
- To W. D. Fox [10 April 1829]
- To W. D. Fox [12 April 1829]
- To W. D. Fox [23 April 1829]
- To W. D. Fox [18 May 1829]
- From Francis Knyvett Leighton [3 June 1829]
- To W. D. Fox 7 June [1829]
- To W. D. Fox [3 July 1829]
- To W. D. Fox [15 July 1829]
- To W. D. Fox 29 [July 1829]
- To W. D. Fox 26 [August 1829]
- To W. D. Fox 4 September [1829]
- To W. D. Fox [22 September 1829]
- To W. D. Fox [15 October 1829]
- To W. D. Fox [3 November 1829]
- To W. D. Fox [3 January 1830]
- To W. D. Fox [13 January 1830]
- From Fanny Owen 27 January [1830]
- To W. D. Fox [25 March 1830]
- To W. D. Fox [1 April 1830]
- To W. D. Fox [9 May 1830]
- To W. D. Fox [31 May 1830]
- To W. D. Fox 25 [August 1830]
- From Fanny Owen [8 September 1830]
- To W. D. Fox [8 September 1830]
- From Fanny Owen 4 October [1830]
- To W. D. Fox [8 October 1830]
- To W. D. Fox 5 November [1830]
- To W. D. Fox [27? November 1830]
- To W. D. Fox [23 January 1831]
- From George Simpson [26] January [1831]
- From Henry Matthew [2 February 1831]
- To W. D. Fox [9 February 1831]
- From Henry Matthew [14 February 1831]
- To W. D. Fox [15 February 1831]
- From Henry Matthew [March or April 1831]
- To W. D. Fox [7 April 1831]
- From Fanny Owen [8 April 1831]
- To Caroline Darwin [28 April 1831]
- From [J. M. Herbert] [early May 1831]
- To W. D. Fox [11 May 1831]
- To W. D. Fox [9 July 1831]
- To J. S. Henslow [11 July 1831]
- To C. T. Whitley [19 July 1831]
- To W. D. Fox 1 August [1831]
- From George Peacock to J. S. Henslow [6 or 13 August 1831]
- From J. S. Henslow 24 August 1831
- From George Peacock [c. 26 August 1831]
- To J. S. Henslow 30 [August 1831]
- From R. W. Darwin to Josiah Wedgwood II 30–1 August 1831
- From Josiah Wedgwood II to R. W. Darwin 31 August 1831
- To R. W. Darwin 31 August [1831]
- From R. W. Darwin to Josiah Wedgwood II 1 September 1831
- To Francis Beaufort 1 September [1831]
- From Francis Beaufort to Robert FitzRoy 1 September [1831]
- To J. S. Henslow [2 September 1831]
- To Susan Darwin [4 September 1831]
- From Adam Sedgwick 4 September 1831
- To Susan Darwin [5 September 1831]
- To J. S. Henslow [5 September 1831]
- To Susan Darwin [6 September 1831]
- To W. D. Fox 6 [September 1831]
- To Charles Thomas Whitley [9 September 1831]
- To Susan Darwin [9 September 1831]
- To J. S. Henslow 9 [September 1831]
- From John Coldstream 13 September 1831
- From Charles Whitley 13 September 1831
- To Susan Darwin [14 September 1831]
- To Susan Darwin 17 [September 1831]
- To J. S. Henslow 17 [September 1831]
- From Adam Sedgwick 18 September 1831
- From Frederick Watkins [18 September 1831]
- To Robert FitzRoy [19 September 1831]
- To W. D. Fox 19 [September 1831]
- From Charlotte Wedgwood 22 September [1831]
- From Fanny Owen [22 September – 2 October 1831]
- From Robert FitzRoy 23 September 1831
- To Charles Thomas Whitley 23 [September 1831]
- From Fanny Owen [26 September 1831]
- From Sarah Owen [27–30 September 1831]
- To J. S. Henslow 28 [September 1831]
- To Robert FitzRoy [4 or 11 October 1831]
- To J. S. Henslow [4 or 11 October 1831]
- From Fanny Owen [6 October 1831]
- To Robert FitzRoy [10 October 1831]
- From J. S. Henslow 25 October 1831
- To J. S. Henslow 30 [October 1831]
- To Caroline Darwin [31?] October [1831]
- To Caroline Darwin 12 November [1831]
- To J. S. Henslow 15 [November 1831]
- To Charles Whitley 15 November [1831]
- To W. D. Fox 17 [November 1831]
- From J. S. Henslow 20 November 1831
- From Fanny Owen 2 [December 1831]
- To J. S. Henslow 3 December [1831]
- From Caroline, Catherine, and Susan Darwin 20–31 December [1831]
- From Catherine Darwin 8 January – 4 February 1832
- From Charlotte Wedgwood 12 January – 1 February 1832
- From Bartholomew James Sulivan [17 January – 7 February 1832]
- From J. S. Henslow 6 February 1832
- To R. W. Darwin 8 February – 1 March 1832
- To R. W. Darwin 10 February 1832
- From Susan Darwin 12 February [– 3 March] 1832
- From William Mostyn Owen Sr 1 March 1832
- From Fanny Owen 1 March 1832
- From Caroline Darwin (with postscript by Marianne Parker) 12[–31] March [1832]
- To Caroline Darwin 2–6 April 1832
- From J. M. Herbert 15–17 April 1832
- To Caroline Darwin 25–6 April [1832]
- From Catherine Darwin 26[–7] April [1832]
- To W. D. Fox May 1832
- To Catherine Darwin May–June [1832]
- From Susan Darwin 12 May [– 2 June] 1832
- To J. S. Henslow 18 May – 16 June 1832
- To J. M. Herbert [1–6] June 1832
- From Caroline Darwin 12–28 June [1832]
- From Francis Beaufort to C. S. Darwin 29 June [1832]
- From W. D. Fox 30 June 1832
- To Catherine Darwin 5 July [1832]
- To Susan Darwin 14 July – 7 August [1832]
- To J. S. Henslow [23 July –] 15 August [1832]
- From Catherine Darwin 25 July [– 3 August] 1832
- From Susan Darwin 15[–18] August 1832
- To Frederick Watkins 18 August 1832
- From E. A. Darwin 18 August [1832]
- From Sarah Williams 26[–31] August 1832
- From W. D. Fox 29 August – 28 September 1832
- From Caroline Darwin 12[–18] September 1832
- From Charlotte Langton 27 [September] 1832
- From Catherine Darwin 14 October [1832]
- To Caroline Darwin 24 October – 24 November [1832]
- To W. D. Fox [12–13] November 1832
- From C. L. Hughes 2 November 1832
- From Susan Darwin 12–18 November 1832
- To J. S. Henslow [c. 26 October –] 24 November [1832]
- From J. M. Herbert 1[–4] December 1832
- From Robert FitzRoy [1833?]
- From Caroline Darwin 13 January 1833
- From J. S. Henslow 15–21 January 1833
- From W. D. Fox 23 January 1833
- From E. A. Darwin to J. S. Henslow 23 January [1833]
- From R. W. Darwin and the Misses Darwin to J. S. Henslow 1 February 1833
- From Susan Darwin 3–6 March 1833
- From R. W. Darwin 7 March 1833
- From Caroline Darwin 7 March [1833]
- To Caroline Darwin 30 March – 12 April 1833
- To J. S. Henslow 11 April 1833
- From Caroline Darwin 1–4 May 1833
- To Catherine Darwin 22 May – 14 July 1833
- To W. D. Fox 23 May 1833
- From Catherine Darwin 29 May 1833
- To J. M. Herbert 2 June 1833
- To J. S. Henslow 18 July 1833
- From Susan Darwin 22–31 July 1833
- From Robert FitzRoy 24 [August 1833]
- From J. S. Henslow 31 August 1833
- From Caroline Darwin 1 September 1833
- To Caroline Darwin 20 September [1833]
- To J. S. Henslow [20–7] September 1833
- From Catherine Darwin 27 September 1833
- From Robert FitzRoy 4 October 1833
- From Susan Darwin 15 October 1833
- From Sarah Williams 21 October 1833
- From Fanny Myddelton Biddulph [c. 21 October 1833]
- To Caroline Darwin 23 [October 1833]
- To W. D. Fox 25 October 1833
- From Caroline Darwin 28 October [1833]
- From Catherine Darwin 29 October 1833
- From Henry Stephen Fox 31 October 1833
- To F. W. Hope 1 November 1833
- From T. C. Eyton 12 November 1833
- To J. S. Henslow 12 November 1833
- To Caroline Darwin 13 November 1833
- From Edward Lumb 13 November 1833
- From Catherine Darwin 27 November 1833
- To Susan Darwin 3 December [1833]
- From Caroline Darwin 30 December [1833] – 3 January 1834
- From F. W. Hope 15 January 1834
- From Catherine Darwin 27–30 January 1834
- From Susan Darwin 12[–28] February 1834
- To J. S. Henslow March 1834
- From Caroline Darwin 9–28 March [1834]
- From J. M. Herbert [28 March] 1834
- To Edward Lumb 30 March 1834
- To Catherine Darwin 6 April 1834
- From William Owen Sr 10 April – 1 May 1834
- From Edward Lumb to J. S. Henslow 2 May 1834
- From Edward Lumb 8 May 1834
- From Susan Darwin [23] May 1834
- From R. E. Alison [March – July 1835]
- To Catherine Darwin 20–9 July 1834
- From J. S. Henslow 22 July 1834
- To Charles Whitley 23 July 1834
- To J. S. Henslow 24 July – 7 November 1834
- From H. S. Fox 25 July 1834
- To Caroline Darwin 9–12 August 1834
- To Robert FitzRoy [28 August 1834]
- From Thomas Sutcliffe [28 August – 5 September 1834]
- From F. A. Eck [before 13 October 1834]
- From Caroline Darwin 30 September 1834
- To J. S. Henslow 4 October 1834
- To Caroline Darwin 13 October 1834
- From Catherine Darwin 29 October 1834
- From W. D. Fox 1 November 1834
- To Catherine Darwin 8 November 1834
- To J. S. Henslow 8 November 1834
- From Susan Darwin [24] November 1834
- From Caroline Darwin 29 December [1834]
- From Caroline and Catherine Darwin 28 January [1835]
- From Charles Whitley 5 February 1835
- From Susan Darwin 16 February 1835
- From Charles D. Douglas 24 February 1835
- To W. D. Fox [7–11] March 1835
- To Caroline Darwin 10–13 March 1835
- To J. S. Henslow [10]–13 March 1835
- From Caroline Darwin 30 March 1835
- To J. S. Henslow 18 April 1835
- To Susan Darwin 23 April 1835
- To Catherine Darwin 31 May [1835]
- From R. E. Alison 25 June 1835
- From R. H. Corfield 26–7 June 1835
- From Charles San Lambert [c. July 1835]
- From R. H. Corfield 14 — 18 July 1835
- To Caroline Darwin [19] July – [12 August] 1835
- To W. D. Fox [9–12 August] 1835
- To J. S. Henslow 12 [August] 1835
- To H. S. Fox 15 August 1835
- To Alexander Burns Usborne [c. 1–5 September 1835]
- To Susan Darwin 3 [September] 1835
- From Catherine Darwin 30 October 1835
- From Susan Darwin 22 November 1835
- To Caroline Darwin 27 December 1835
- From James Busby to Alexander Berry 29 December 1835
- From R. W. Darwin to J. S. Henslow 28 December 1835
- From Caroline Darwin 29 December [1835]
- From C. D. Douglas 5 January 1836
- To Phillip Parker King [21 January 1836]
- To Susan Darwin 28 January 1836
- To J. S. Henslow [28–9] January 1836
- From Catherine Darwin 29 January 1836
- From Susan Darwin 12 February 1836
- To Catherine Darwin 14 February 1836
- To W. D. Fox 15 February 1836
- From Caroline Darwin 28 March 1836
- To Caroline Darwin 29 April 1836
- To Catherine Darwin 3 June 1836
- To South African Christian Recorder 28 June 1836
- To J. S. Henslow 9 July 1836
- To Caroline Darwin 18 July 1836
- To Susan Darwin 4 August [1836]
- To Josiah Wedgwood II [5 October 1836]
- Caroline Darwin to Sarah Elizabeth (Elizabeth) Wedgwood [5 October 1836]
- From William Owen Sr 5 October [1836]
- To Robert FitzRoy 6 October [1836]
- To J. S. Henslow 6 October [1836]
- From Robert FitzRoy [19–]20 October [1836]
- To Caroline Darwin 24 October [1836]
- To Charles Whitley 24 October [1836]
- From Emma Wedgwood to F. E. E. Wedgwood [24 October 1836]
- From Emma Wedgwood to F. E. E. Wedgwood [28 October 1836]
- To J. S. Henslow [30–1 October 1836]
- To J. S. Henslow [1 November 1836]
- To W. D. Fox 6 November [1836]
- To Charles Wilkes [7 November 1836]
- To Caroline Darwin [9 November 1836]
- From S. E. (Elizabeth) Wedgwood to Hensleigh Wedgwood [16] November [1836]
- From J. M. Herbert [19 November 1836]
- From Emma Wedgwood and Louisa Holland to F. E. E. Wedgwood [21 and 24 November 1836]
- To Caroline Darwin [7 December 1836]
- To The Master & Fellows, Caius College [19 December 1836 – 6 March 1837]
- To W. D. Fox 15 December [1836]
- From Emma Wedgwood to F. E. E. Wedgwood [17 December 1836]
- To Richard Owen 19 December [1836]
- To Anthony Carlisle [19 December 1836]
- From William Owen Sr 19 December 1836
- From Hensleigh Wedgwood [20 December 1836]
- From Sarah Elizabeth (Sarah) Wedgwood 23 December [1836]
- From Anthony Carlisle 23 December 1836
- From Charles Lyell 26 December 1836
- From Catherine Darwin 27 [December 1836]
- From Robert FitzRoy 30 December 1836
- From J. S. Henslow [5 November 1837 – March 1838]
- To John Maurice Herbert [1 January 1837]
- From Fanny Myddelton Biddulph 14 January 1837
- From Emily Catherine Darwin 15 [January 1837]
- To a member of Downing College, Cambridge [19 January 1837]
- From Charles Lyell 13 February 1837
- From Catherine and Caroline Sarah Darwin [16 February 1837]
- From Caroline Darwin [21 February 1837]
- To Caroline Darwin 27 February 1837
- To William Whewell [10 March 1837]
- To W. D. Fox [12 March 1837]
- To Charles Babbage [14 March 1837 – 31 December 1838]
- From the Misses Horner [17 March 1837 – 28 December 1838]
- To Eugène Robert 28 March 1838
- To Charles Babbage [1838]
- To the Geological Society of London 27 March 1837
- To J. S. Henslow 28 March [1837]
- To Leonard Jenyns 10 April [1837]
- To J. S. Henslow 18 [May 1837]
- To J. S. Henslow [28 May 1837]
- To John Lort Stokes [after 31 May 1837]
- To Charles Babbage [21 January 1838]
- To Charles Babbage [June – September 1837]
- To William Buckland [15 June 1837]
- To Caroline Darwin [19 May – 16 June 1837]
- To Francis Beaufort 16 June 1837
- To William Whewell 18 June [1837]
- To J. S. Henslow [20 June 1837]
- From J. S. Henslow to the Chancellor of the Exchequer, Thomas Spring Rice 21 June 1837
- To F. W. Hope [21 June 1837]
- From Charles Cardale Babington 1 July 1837
- To W. D. Fox 7 July [1837]
- From Adam Sedgwick to the Geological Society of London 10 July 1837
- To J. S. Henslow [12 or 13 July 1837]
- To John Richardson [24 July 1837]
- To Charles Lyell 30 July 1837
- To J. S. Henslow [1 August 1837]
- To William Shoberl 2 August [1837]
- To William Lonsdale 3 August [1837]
- To the Chancellor of the Exchequer, Thomas Spring Rice 3 August 1837
- To John Richardson [11 August 1837]
- From Richard Owen [7 August 1837]
- To A. S. Horner [9 August 1837]
- To J. S. Henslow 16 August [1837]
- Minutes of the Board of the Treasury 25 August 1837
- To W. D. Fox 28 August [1837]
- To Elizabeth Wedgwood [28 August 1837]
- From Charles Lyell 29 August and 5 September 1837
- From the Lords Commissioners of Her Majesty’s Treasury 31 August 1837
- From Smith, Elder & Co. 12 September 1837
- To J. S. Henslow [20 September 1837]
- To A. Y. Spearman 20 September 1837
- From Henry Colburn to Robert Fitzroy 22 September 1837
- To William Shoberl [22 or 23 September 1837]
- To J. S. Henslow [23 September 1837]
- [Francis Thornhill Baring] 11 October 1837
- To J. S. Henslow 14 October [1837]
- To the Geological Society of London 20 October 1837
- To William Lonsdale [May? 1837]
- To Henry Colburn [23 October 1837]
- To J. S. Henslow [4 November 1837]
- From Elizabeth Wedgwood 10 November [1837]
- From Robert FitzRoy 15 November 1837
- From Robert FitzRoy 16 November 1837
- To J. S. Henslow [19 November 1837]
- To Richard Owen [c. December 1837]
- From Susan Elizabeth Darwin [early December 1837?]
- To Leonard Jenyns 3 December [1837]
- To Leonard Jenyns [4 December 1837]
- To W. D. Fox [11 December 1837]
- To Charles Lyell [19 December 1837]
- To Richard Owen 28 [December 1837]
- To Richard Owen [28 December 1837]
- To Richard Owen [1839 – April 1840]
- To Woodbine Parish [January 1839?]
- Questions for Mr Wynne [February–July 1838]
- To Richard Owen [January 1838]
- To J. S. Henslow [21 January 1838]
- To John Gould [February 1838]
- From William Fullerton Lindsay-Carnegie to Charles Lyell [14 February 1838]
- To A. Y. Spearman 16 February 1838
- From John George Children 21 February 1838
- From A. Y. Spearman 23 February 1838
- To John George Children 22 February [1838]
- From Robert FitzRoy 26 February 1838
- From William Buckland to the Geological Society of London 9 March 1838
- From Robert Bastard James to Charles Lyell [c. 10 March 1838]
- To J. S. Henslow [26 March 1838]
- To Susan Darwin [1 April 1838]
- From Leonard Horner 7 April [1838]
- To John Gould [13 April 1838]
- Notes on marriage [after 7 Apr 1838]
- From John Gould [13 April] 1838
- To Susan Darwin [26 April 1838]
- To Caroline Wedgwood [May 1838]
- To C. T. Whitley [8 May 1838]
- To William Lonsdale [15 May 1838]
- To Susan Darwin [15 May 1838]
- From Adam Sedgwick to the Geological Society of London [after 15 May 1838]
- To John Forbes Royle [24 May 1838]
- To Charles Wood 24 May 1838
- From Francis Beaufort 26 May [1838]
- To George Robert Waterhouse [August 1838–40]
- To William Lonsdale [c. June 1838]
- From W. D. Fox [c. November 1838]
- To Richard Owen [15 December 1837 – 9 June 1838]
- To W. D. Fox [15 June 1838]
- Notes on marriage [July 1838]
- From Francis Walker 6 July [1838]
- From J. P. S. de Grateloup 18 July 1838
- To Thomas Spring Rice [before 7 July 1838]
- To William John Broderip [August–December 1838]
- To Emma Wedgwood [7 August 1838]
- To Charles Lyell 9 August [1838]
- To A. Y. Spearman 18 August 1838
- From Charles Lyell 6 and 8 September 1838
- To the Geological Society of London 7 September 1838
- To [unidentified] 12 September [1838]
- To Charles Lyell [14] September [1838]
- To A. Y. Spearman 22 September 1838
- From Bartholomew James Sulivan 20 October 1838
- To John Stevens Henslow 3 November 1838
- To J. F. W. Herschel 2 [November 1838]
- From Caroline Wedgwood [11 November 1838]
- From J. S. Henslow [after 3 November 1838]
- To Charles Lyell [12 November 1838]
- From Robert Waring Darwin to Josiah Wedgwood II 13 November 1838
- From Emma and Elizabeth Wedgwood to Catherine Darwin [13 November 1838]
- From Erasmus Alvey Darwin [14 November 1838]
- From Charlotte Langton 14 November [1838]
- To Emma Wedgwood [14 November 1838]
- From Josiah Wedgwood II and Emma Wedgwood to R. W. Darwin 15 November 1838
- From William Owen Sr 21 November 1838
- To Emma Wedgwood [21 November 1838]
- From Emma Wedgwood [21–2 November 1838]
- From Harriet Henslow 22 November [1838]
- To C. T. Whitley 23 November [1838]
- From Emma Wedgwood [25–6 November 1838]
- To Emma Wedgwood [27 November 1838]
- From Sarah Harriet Hosier Williams [27 November 1838]
- From Emma Wedgwood [30 November 1838]
- To Emma Wedgwood [30 November – 1 December 1838]
- From Emma Wedgwood [3 December 1838]
- From Charlotte Langton 4 December [1838]
- To George Robert Gray [4 December 1838]
- From Thomas Bell [5 December 1838]
- To Joseph Beete Jukes 6 December 1838
- To G. R. Gray [6 December 1838]
- From Albert Way 9 December 1838
- From J. S. Henslow 16 December 1838
- From William Yarrell [c. 17 December 1838]
- To the Secretary of the American Philosophical Society 20 December 1838
- To Adam Sedgwick 21 [December 1838]
- From Emma Wedgwood [23 December 1838]
- To J. B. Jukes 25 December [1838]
- From Emma Wedgwood [26 December 1838]
- To Emma Wedgwood [29 December 1838]
- From Emma Wedgwood [29 December 1838]
- From Emma Wedgwood [30 December 1838]
- To Emma Wedgwood [31 December 1838 –] 1 January 1839
- From William Yarrell [December 1838]
- To T. L. Mitchell [1838]
- To Charles Babbage [February 1839 – August 1842]
- From Emma Darwin [c. February 1839]
- From Susan Darwin [c. 24 October 1839]
- To John Phillips [18 March 1839]
- To Charles Babbage [October 1839 – August 1842]
- From G. R. Waterhouse [1839 – 10 February 1840]
- To Charles Babbage [1839 – August 1842]
- To John Maurice Herbert [January 1839 – September 1842]
- To J. Shillinglaw, Secretary, Royal Geographical Society [1839 – May 1842]
- To Charles Stokes [1839 – September 1842]
- To Charles Babbage 19 [February 1839 – August 1842]
- To Charles Lyell [c. 9 January 1839]
- To Emma Wedgwood 2 [–3 January 1839]
- From Emma Wedgwood [3 January 1839]
- To William Whewell 4 [January 1839]
- To Emma Wedgwood [6–7 January 1839]
- From Emma Wedgwood [7 January 1839]
- From Emma Wedgwood [9 January 1839]
- From J. M. Herbert 13 January [1839]
- To W. J. Broderip 19 January [1839]
- To Emma Wedgwood [20 January 1839]
- From Emma Wedgwood [20–1 January 1839]
- To Edwin C. Prince 21 January [1839]
- From Emma Wedgwood [23 January 1839]
- To Emma Wedgwood [26 January 1839]
- From Thomas Evans Blackwell 26 January 1839
- To A. Y. Spearman 4 February 1839
- From J. S. Henslow 7 February 1839
- To William Whewell 16 February [1839]
- From Andrew Irvine 7 March 1839
- To William Lonsdale [27 April 1839 or earlier]
- To William Lonsdale [8 March 1839]
- From Andrew Smith 16 March 1839
- To the Librarian of the Royal Geographical Society [19 March 1839]
- From Robert FitzRoy [20 March 1839]
- To William Shoberl [21 March 1839]
- To William Herbert [c. 1 April 1839]
- From William Herbert to J. S. Henslow 5 April 1839
- From William Whewell 11 April 1839
- From J. S. Henslow [c. 14 April 1839]
- To William Whewell 16 April [1839]
- To the Secretary of the Geological Society of France 25 April 1839
- From Caleb Burrell Rose 30 April 1839
- To G. R. Gray [June–October 1839]
- From Richard Sutton Ford 6 May 1839
- From George Tollet [10 May 1839]
- To the Secretary of the American Philosophical Society 23 May 1839
- To Gideon Algernon Mantell 23 May 1839
- From Benjamin Silliman Sr and Benjamin Silliman Jr 24 May 1839
- To Alphonse de Candolle 25 May [1839]
- To A. Y. Spearman 27 May 1839
- To W. S. MacLeay 29 May 1839
- Letter of recommendation for Syms Covington 29 May 1839
- To T. L. Mitchell 31 May [1839]
- From Robert FitzRoy [2 or 16 June 1839]
- To Mr Folthorp of Smith, Elder & Co. 6 June [1839]
- From William Buckland 7 June 1839
- From Richard Owen 11 June 1839
- From William Henry Fitton 13 June 1839
- From William Lonsdale 15 June 1839
- From Robert FitzRoy 20 June [1839]
- To William Herbert 26 June 1839
- From William Herbert [c. 27 June 1839]
- To Thomas Green [after 30 June 1839]
- From William Andrew Fane De Salis 8 July 1839
- To A. Y. Spearman 13 July 1839
- From William Yarrell 14 July 1839
- To Leonard Jenyns 15 July [1839]
- From John Grant Malcolmson 24 July 1839
- From Jean Baptiste Armand Louis Léonce Élie de Beaumont 31 July 1839
- To W. H. Smyth 7 August [1839]
- To William Shoberl 16 August [1839]
- From Carl Friedrich Alexander Hartmann 23 August 1839
- From J. G. Malcolmson 31 August 1839
- From Alexander von Humboldt 18 September 1839
- From J. G. Malcolmson 7 October 1839
- To John Washington 14 October [1839]
- To John Washington [14 October 1839]
- To Leonard Jenyns 14 October [1839]
- To A. Y. Spearman 14 October 1839
- To Leonard Jenyns 17 October [1839]
- To Leonard Jenyns [20 or 27 October 1839]
- To W. D. Fox 24 October [1839]
- To Caroline Wedgwood [27 October 1839]
- To J. S. Henslow [10 November 1839]
- To John Washington 1 November [1839]
- To Alexander von Humboldt 1 November 1839
- To W. H. Miller 22 [November 1839]
- To A. Y. Spearman 27 November 1839
- To T. C. Eyton [30 November 1839]
- From J. G. Malcolmson 30 November 1839
- To William Walton [1840–2]
- To William Walton [1840–2]
- To John Edward Gray 1 January [1840]
- To T. C. Eyton [6 January 1840]
- To Basil Hall [7 January 1840]
- To A. Y. Spearman 16 January 1840
- To the Geological Society of London 22 January 1840
- To J. S. Henslow [24 January 1840]
- To Mr Folthorp of Smith, Elder & Co. [6 February 1840]
- To Charles Lyell [19 February 1840]
- To Robert FitzRoy [20 February 1840]
- To W. C. Redfield 24 February [1840]
- To Richard Owen 24 [February 1840]
- To Benjamin Silliman 26 February 1840
- To Leonard Jenyns [27 February 1840]
- To Basil Hall 15 March 1840
- From J. G. Malcolmson [after 7 October 1839]
- To Richard Owen [March? 1840]
- To David Milne 20 [February 1840]
- To the President and Council of the Geological Society of London 24 March 1840
- To the Geological Society of London 28 March [1840]
- From David Milne 28 March 1840
- From Charles Maclaren to Thomas Walker 30 March 1840
- To Leonard Jenyns 5 April [1840]
- To Emma Darwin [5 April 1840]
- From Benjamin Silliman 7 April 1840
- To William Kemp 1[1] May [1840]
- To Thomas Walker 5 May [1840]
- From W. C. Redfield 6 May 1840
- From B. J. Sulivan 12 May 1840
- To Society for the Encouragement of Arts, Manufactures, and Commerce 13 May [1840–2]
- To John Washington, Secretary, Royal Geographical Society 16 May 1840
- To A. Y. Spearman 20 May 1840
- To Robert Fitzroy [20 February 1840]
- To Charles Babbage 26 May [1840]
- To ? [2 June? 1840]
- To J. M. Herbert [after 5 June 1840]
- To W. D. Fox [7 June 1840]
- To J. S. Henslow 3 July [1840]
- From Jean Charles Léonard Simonde de and Jessie Sismondi to Emma Darwin 1 July 1840
- From Susan and Catherine Darwin [22 July 1840]
- To G. N. Smith [c. 15 August 1840]
- Frances Allen to G. N. Smith 19 August [1840]
- To John Phillips [November 1840]
- To John Gould [after 1 December 1840]
- From J. S. Henslow 2 November 1840
- To the Geological Society of London 18 November [1840]
- To G. N. Smith 20 November [1840]
- To G. R. Gray [20 November – 11 December 1840]
- From J. S. Henslow 21 November 1840
- To A. Y. Spearman 22 November 1840
- To M. J. Berkeley [26 November 1840]
- To W. A. Leighton 1 December 1840
- To W. C. Redfield [22 December 1840]
- To W. D. Fox [25 January 1841]
- To G. R. Gray [February 1841]
- From G. E. Bearpark 12 February 1841
- From W. D. Fox [1 June 1846]
- To G. R. Gray [February–March 1841]
- To Charles Lyell [21 February – 4 April 1841]
- To M. J. Berkeley [March 1841]
- To Charles Lyell [March 1841]
- To Louis Agassiz 1 March [1841]
- To Charles Lyell [9 March 1841]
- To Charles Lyell [12 March 1841]
- To A. Y. Spearman 27 March 1841
- From Leonard Jenyns [c. 30 March 1841]
- To William Lonsdale 14 April [1841]
- From J. S. Henslow 19 April 1841
- From W. C. Redfield May 1841
- To A. Y. Spearman 17 May 1841
- To E. W. Brayley 8 May [1841]
- To Leonard Jenyns 24 June [1841]
- To Emma Darwin [1 July 1841]
- To Emma Darwin [3 July 1841]
- To Charles Lyell 6 [July 1841]
- From Catherine Darwin 8 July 1841
- From Charles Lyell [c. 16 July 1841]
- To Charles Lyell [September–December 1842]
- From Alexander Bridport Becher 1 September 1842
- To W. D. Fox [23 August 1841]
- To Gardeners’ Chronicle [16 August 1841]
- To Richard Owen 25 August [1841–2]
- From Richard Owen [17 September 1841?]
- To W. D. Fox [28 September 1841]
- To J. P. Gaimard 14 October 1841
- From John Abberley (Darwin gardener) and R. W. Darwin 18 October 1841
- To Leonard Jenyns [November 1841]
- To the Council of the Geological Society of London [before 6 December 1841]
- To William Yarrell [5 or 12 September 1842]
- To Charles Stokes [January–March 1842]
- To Leonard Jenyns [13? January 1842]
- To J. S. Henslow [26 January 1842]
- To the Geological Society of London 31 January [1842]
- To J. F. Royle [2 February 1842]
- To Francis Boott [3 February 1842]
- To Richard Owen [4 February 1842]
- To H. T. De la Beche 7 February 1842
- To Hugh Edwin Strickland 17 February [1842]
- To H. E. Strickland [19 February 1842]
- To Susan Darwin [22 February 1842]
- To Emma Darwin [8 March 1842]
- To Emma Darwin [13 March 1842]
- To W. D. Fox 23 March [1842]
- To W. D. Fox [31 March 1842]
- To A. Y. Spearman 29 April 1842
- To Emma Darwin [9 May 1842]
- To Leonard Jenyns [May–September 1842]
- To Mary-Anne Herbert [5 May 1842]
- To Leonard Jenyns [9 May 1842]
- To Smith, Elder & Co. [17 May 1842]
- To H. E. Strickland 31 May [1842]
- To W. A. Leighton [1–23 July 1841]
- To W. H. Fitton 23 June 1842
- To Catherine Darwin [16 September 1842]
- To Susan Darwin [late July–August 1842]
- From John Provis 14 July 1842
- From John Provis 20 July 1842
- To Catherine Darwin [24 July 1842]
- To A. Y. Spearman 5 August 1842
- To H. E. Strickland [11 August 1842]
- From Thomas Blunt 11 August 1842
- To W. J. Broderip [31 August 1842]
- To G. R. Waterhouse [4 or 11 September 1842]
- To William Buckland [November 1840 – 17 February 1841]
- To J. S. Henslow 16 September [1842]
- From Elizabeth Wedgwood [25 September 1842]
- From Hensleigh Wedgwood 25 September [1842]
- To Charles Lyell [5 and 7 October 1842]
- To Royal Geographical Society [28 January or 4 February 1846]
- To the Geological Society of London 4 October 1842
- To A. S. Horner [4 October 1842]
- To Charles Lyell [5 and 7 October 1842]
- To Julian Jackson 13 October [1842]
- To W. H. Miller [16 October – 27 November 1842]
- To S. P. Woodward [14 January 1843]
- To Charles Lyell [November–December 1842]
- To W. A. Leighton 25 November [1844?–6]
- To W. D. Fox [9 December 1842]
- From [G. R. Waterhouse] [1943?]
- From [G. R. Waterhouse] [1943?]
- To Richard Owen [March 1843 – 15 May 1846]
- To Smith, Elder & Co. [14 January 1843]
- To Smith, Elder & Co. 21 January [1843]
- To J. S. Henslow [22 January 1843]
- To J. E. Gray 25 January [1843]
- To Charles Maclaren [c. February 1843]
- To Charles Maclaren [15 November – December 1842]
- To the Royal Geographical Society February 1843
- To the Geological Society of London 12 March [1843]
- To William Jackson Hooker 12 March [1843]
- To W. D. Fox [25 March 1843]
- From William Mostyn Owen Sr 26 March 1843
- To Robert FitzRoy 31 March [1843]
- To William Kemp 7 April [1843]
- To John Lindley 8 [April 1843]
- From John Lindley [after 8 April 1843]
- From Charles Lyell [9 April 1843]
- From Richard Brinsley Hinds 21 April 1843
- To G. A. Mantell 21 [April 1843]
- To Royal Geographical Society 23 April [1843]
- To William Kemp 24 [April 1843]
- To Susan Darwin 27[–8] April [1843]
- To Susan Darwin [8 December 1843]
- From B. J. Sulivan [10 May 1843]
- To G. A. Mantell 13 May [1843]
- To [Leonard Horner?] 25 June 1843
- To Smith, Elder, and Company 29 June [1843]
- To E. A. Darwin [before 1 October 1844]
- To B. W. Hawkins [c. 1 October 1843]
- To Henry Colburn 4 July [1843]
- To Ernst Dieffenbach 4 July [1843]
- To G. R. Waterhouse 8 July 1843
- To Ernst Dieffenbach 19 July [1843]
- From R. B. Hinds 19 July [1843]
- To G. R. Waterhouse [26 July 1843]
- To G. R. Waterhouse [31 July 1843]
- From G. R. Waterhouse [c. 2 August 1843]
- From J. S. Henslow [5 August 1843]
- From G. R. Waterhouse 9 August 1843
- To Ernst Dieffenbach 15 August [1843]
- From John Lindley [before 2 September 1843]
- To J. S. Henslow [2 September 1843]
- To William Kemp [8 September 1843]
- To W. D. Fox [4 September 1843]
- To Gardeners’ Chronicle [late August 1843]
- To the Admiralty 9 [May 1846]
- To John Edward Davis 15 September [1843]
- To Charles Lyell [15 or 22 September 1843]
- To S. P. Woodward 29 [September 1843]
- To Ernst Dieffenbach 2 October 1843
- From William Kemp 2 October 1843
- To J. S. Henslow [before 7 October 1843]
- To Syms Covington 7 October 1843
- From J. S. Henslow 9 October 1843
- To William Kemp 9 October [1843]
- To Smith, Elder & Co. [9 October 1843]
- To A. Y. Spearman 9 October 1843
- To Josiah Wedgwood III [12–24] October 1843
- To Emma Darwin [12–24 October 1843]
- To J. S. Henslow [14 October 1843]
- To William Kemp [14 October 1843]
- From William Kemp 17 October 1843
- From J. S. Henslow 17 October 1843
- From C. C. Babington 26 October 1843
- To Smith, Elder & Co. 27 October [1843]
- To G. R. Waterhouse [November 1843]
- To William Kemp 1 November [1843]
- From William Kemp 4 November 1843
- To William Kemp [9 November 1843]
- To J. S. Henslow [4 November 1843]
- From William Kemp 10 November 1843
- To J. D. Hooker [13 or 20 November 1843]
- To W. D. Fox [20 November 1843]
- To William Kemp 22 November [1843]
- From William Kemp 24 November 1843
- To William Kemp 1 December [1843]
- From J. D. Hooker 28 November 1843
- To G. R. Waterhouse [3 or 17 December 1843]
- To Susan Darwin 2 December 1843
- From William Kemp 4 December 1843
- To William Kemp 7 December [1843]
- From Francis Walker 10 December 1843
- To J. D. Hooker [12 December 1843]
- From J. D. Hooker [12 December 1843 – 11 January 1844]
- To Charles Lyell [16 December 1843]
- To Ernst Dieffenbach 16 December 1843
- To Emma Darwin [3 June 1844]
- From Erasmus Alvey Darwin [May 1844 – 1 October 1846]
- To Geological Society of London [3 January 1844]
- To J. D. Hooker [11 January 1844]
- From Bartholomew James Sulivan 13 January – 12 February 1845
- To Henry Denny 20 January [1844]
- To Ernst Dieffenbach 25 January 1844
- To J. D. Hooker [27 January 1844]
- From J. D. Hooker 29 January 1844
- To Henry Denny 5 February [1844]
- To J. D. Hooker [3–17 February 1844]
- To Charles Wicksted 13 February [1844?]
- To J. D. Hooker 23 February [1844]
- To William Kemp 23 February [1844]
- From J. D. Hooker [23 February – 6 March 1844]
- To J. D. Hooker [6 March 1844]
- From J. D. Hooker 9 March 1844
- To J. D. Hooker 11 March [1844]
- To Ernst Dieffenbach 14 March 1844
- To J. D. Hooker 16 March [1844]
- Letter to C. A. Wood 16 March [1844]
- To Gardeners’ Chronicle and Agricultural Gazette [27 March 1844]
- To J. D. Hooker 31 March [1844]
- From J. D. Hooker 5 April 1844
- To J. D. Hooker [17 April 1844]
- To Christian Gottfried Ehrenberg 20 April [1844]
- From George Robert Waterhouse 26 April 1844
- From G. R. Waterhouse [after 26 April 1844]
- From Philip de Malpas Grey-Egerton 5 May [1844]
- To Julian Jackson 23 May [1844]
- From George Brettingham Sowerby and Edward Forbes 28 May 1844
- To William Benjamin Carpenter [11 or 18 December 1844]
- To J. D. Hooker 1 June [1844]
- To Henry Denny 1 June [1844]
- To Henry Denny 3 June [1844]
- To Gardeners’ Chronicle and Agricultural Gazette [before 8 June 1844]
- To Ernst Dieffenbach 11 June [1844]
- From C. G. Ehrenberg 15 June 1844
- To J. D. Hooker 29 [June 1844]
- To C. G. Ehrenberg 4 July [1844]
- To Emma Darwin 5 July 1844
- From C. G. Ehrenberg 11 July 1844
- To J. D. Hooker [14 July 1844]
- To Henry Denny [27 July – 10 August 1844]
- To J. D. Hooker 22 July [1844]
- To John Stevens Henslow [25 July 1844]
- To Josiah Wedgwood III and E. A. Darwin 25 July 1844
- To The Royal Geographical Society [30 July 1844 – 1 October 1846]
- To Josiah Wedgwood III 31 July 1844
- To J. D. Hooker [1–29 August 1844]
- To Adolf von Morlot 9 August [1844]
- To Henry Denny 12 August [1844]
- To Leonard Horner 29 August [1844]
- To J. D. Hooker 29 [August 1844]
- To Charles Lyell [1 September 1844]
- From J. D. Hooker [c. 3 September 1844]
- To C. G. Ehrenberg 5 September [1844]
- To J. D. Hooker [8 September 1844]
- To Gardeners’ Chronicle and Agricultural Gazette [before 14 September 1844]
- To Gardeners’ Chronicle and Agricultural Gazette [before 14 September 1844]
- To Solicitor? 1 October 1844
- To Adolf von Morlot 10 October [1844]
- To James David Forbes 11 October [1844]
- To Leonard Jenyns 12 October [1844]
- To Emma Darwin [20 or 27 October 1844]
- From J. D. Hooker 28 October 1844
- From Henry Denny 30 October 1844
- To J. D. Forbes [November? 1844]
- To Henry Denny 7 November [1844]
- From J. D. Hooker 8 November 1844
- To J. D. Hooker [10–11 November 1844]
- To J. D. Forbes 13 [November 1844]
- From J. D. Hooker 14 November 1844
- To Gardeners’ Chronicle [before 23 November 1844]
- To J. D. Hooker [18 November 1844]
- To Leonard Jenyns 25 [November 1844]
- To Adolf von Morlot 28 November [1844]
- From J. D. Hooker 29 November 1844
- To J. D. Hooker [2 December 1844]
- To J. D. Hooker [4 December 1844]
- To William Benjamin Carpenter 6 December [1844]
- CD’s notes arising from conversations with J. D. Hooker 8 December 1844
- From J. D. Hooker 12 December 1844
- To J. D. Hooker 16 [December 1844]
- To W. D. Fox 20 December [1844]
- From W. B. Carpenter 21 December 1844
- To J. D. Hooker 25 December [1844]
- To William Benjamin Carpenter 25 December [1844]
- From J. D. Hooker 30 December 1844
- To Edward Cresy [before May 1848?]
- To G. B. Sowerby [1845?]
- From G. R. Waterhouse [c. June 1845]
- From Woodbine Parish [1845?]
- From Edward Forbes [after 14 February 1845]
- To Emma Darwin [7–8 February 1845]
- To David Thomas Ansted, assistant secretary, Geological Society of London [c. January 1845]
- From G. B. Sowerby [January – February? 1845]
- From W. B. Carpenter 2 January [1845]
- To J. D. Hooker [7 January 1845]
- To Charles Hamilton Smith 14 January [1845]
- From C. H. Smith 22 January 1845
- To J. D. Hooker 22 [January 1845]
- From J. D. Hooker [22–30 January 1845]
- To C. G. Ehrenberg 23 January [1845]
- To C. H. Smith 26 January [1845]
- To Emma Darwin [3–4 February 1845]
- To Edward William Brayley 7 February 1845
- To Trenham Reeks [before 8 February 1845]
- To Charles Lyell [8 February 1845]
- From Trenham Reeks 8 February 1845
- To J. D. Hooker [10 February 1845]
- To W. D. Fox [13 February 1845]
- To Leonard Jenyns 14 February [1845]
- From Alcide Charles Victor Dessalines d’Orbigny 14 February 1845
- From A. C. V. D. d’Orbigny [14 February 1845?]
- From Trenham Reeks 25 February 1845
- From J. D. Hooker [late February 1845]
- To Susan Darwin [27 November 1844?]
- From Edward Forbes [March? 1845]
- From William Hopkins 3 March 1845
- From W. H. Miller 8 March [1845]
- From C. G. Ehrenberg 13 March 1845
- From Trenham Reeks 14 March 1845
- From John Higgins 15 March 1845
- To William Parsons, earl of Rosse, Chairman of the Committee of Papers, Royal Society 16 March [1852]
- To John Murray 17 March [1845]
- To J. D. Hooker 19 March [1845]
- To John Murray 20 March [1845]
- From J. D. Hooker [23] March 1845
- To C. G. Ehrenberg 23 March [1845]
- To J. D. Hooker [26 March 1845]
- To J. D. Hooker 31 March [1845]
- To Thomas Bell [26 April – August 1845]
- To J. D. Hooker [16 April 1845]
- From J. D. Hooker [2–6 April 1845]
- To John Murray [5 April 1845]
- To Ernst Dieffenbach 6 April 1845
- From C. G. Ehrenberg 8 April 1845
- To Ernst Dieffenbach 8 April [1845]
- To John Murray [10 April 1845]
- To John Murray 12 April [1845]
- To John Murray 17 [April 1845]
- To C. G. Ehrenberg 19 April [1845]
- To J. D. Hooker 16 [April 1845?]
- To John Murray [23 April 1845]
- To W. D. Fox [24 April 1845]
- To G. B. Sowerby [May 1845]
- To J. D. Hooker [28 April 1845]
- From J. D. Hooker [28 April 1845]
- To J. D. Hooker [May 1845]
- To J. D. Hooker [4 June 1845]
- To George Robert Waterhouse [after 22 May 1845]
- From W. B. Carpenter 5 May 1845
- From Edward Forbes [9 May 1845]
- To Edward Forbes 13 May [1845]
- To J. S. Henslow 16 May [1845]
- From G. R. Waterhouse 21[–22] May 1845
- To C. G. Ehrenberg 21 May [1845]
- To Paul Edmund de Strzelecki [25 May 1845]
- To John Murray [31 May 1845]
- From G. R. Waterhouse [c. June 1845]
- From G. R. Waterhouse [c. June 1845]
- To John Murray [4 June 1845]
- To John Murray [6 June 1845]
- To John Murray 20 [June 1845]
- To John Murray [23 June 1845]
- To John Murray [26 June 1845]
- To J. D. Hooker [27 June 1845]
- To John Murray [28 June 1845]
- To Charles Lyell [5 July 1845]
- From J. D. Hooker [after 12 July 1845]
- From J. D. Hooker [mid-July 1845]
- To John Murray [3 July 1845]
- From B. J. Sulivan 4 July 1845
- From J. D. Hooker 5 July 1845
- To Ernst Dieffenbach [before 9 July 1845]
- To J. D. Hooker [11–12 July 1845]
- From G. R. Waterhouse [11 July 1845]
- To John Murray 16 [July 1845]
- To J. D. Hooker [22 July – 19 August 1845]
- From Louis Fraser 23 July 1845
- From Louis Fraser [24? July 1845]
- To J. S. Henslow 25 July 1845
- To John Murray [27 July 1845]
- From Hugh Cuming 28 July 1845
- From William Yarrell 29 July 1845
- To Charles Lyell [30 July – 2 August 1845]
- To J. D. Hooker [15 or 22 August 1845]
- From Charles Lyell [after 2 August 1845]
- To Christian Karl Josias Bunsen 16 August [1853]
- To John Murray [23 August 1845]
- To William Jackson Hooker [23 August 1845]
- To Charles Lyell 25 August [1845]
- To W. J. Hooker [25 August 1845]
- To W. J. Hooker 25 August 1845
- To John Murray 27 August [1845]
- To J. D. Hooker [29 August 1845]
- From J. D. Hooker 1 September [1845]
- To John Murray 2 September [1845]
- To J. D. Hooker [3 September 1845]
- To Susan Darwin 3[–4] September 1845
- From J. D. Hooker [4–9 September 1845]
- To J. D. Hooker [10 September 1845]
- From J. D. Hooker 14 September 1845
- To J. D. Hooker [18 September 1845]
- From John Higgins 2 October 1845
- To Charles Lyell 8 October [1845]
- To J. D. Hooker [8 October 1845]
- To J. S. Henslow 28 October [1845]
- To J. D. Hooker 28 October [1845]
- To C. G. Ehrenberg 29 October [1845]
- To J. D. Hooker [5 or 12 November 1845]
- To Edward Hitchcock 6 November [1845]
- To G. B. Sowerby 12 [November 1845]
- To J. D. Hooker [17 November 1845]
- From J. D. Hooker [19 November 1845]
- To J. D. Hooker [21 November 1845]
- To J. D. Hooker [25 November 1845]
- To J. D. Hooker [29 November 1845]
- To G. B. Sowerby [1 December 1845]
- To G. B. Sowerby [3 December 1845]
- To G. B. Sowerby [9? December 1845]
- To J. D. Hooker [10 December 1845]
- To Robert Fitzroy [1846]
- To Reeve Brothers [August 1846]
- To Richard Owen [6 March 1847]
- From G. B. Sowerby [1846]
- To John Lort Stokes [November–December 1845]
- DCP-LETT-941
- To John William Lubbock [16 January 1846]
- From G. B. Sowerby 17 January 1846
- To G. R. Waterhouse 18 January [1853]
- To J. D. Hooker [31 January 1846]
- From A. C. V. D. d’Orbigny 31 January 1846
- From J. D. Hooker 1 February 1846
- To J. D. Hooker [5 February 1846]
- From G. B. Sowerby 7 February 1846
- To J. D. Hooker [8? February 1846]
- To J. D. Hooker [10 February 1846]
- To Robert Hutton [April 1846]
- To J. D. Hooker [15 February 1846]
- To William Thompson 18 February [1846?]
- To J. D. Hooker [25 February 1846]
- From Edward Forbes [25 February 1846]
- To J. D. Hooker [25 February – 2 March 1846]
- From J. D. Hooker 2 [March] 1846
- To Richard Owen [21 April 1846]
- From C. G. Ehrenberg 11 March 1846
- To J. D. Hooker [13 March 1846]
- To J. D. Hooker [24 March 1846]
- To J. D. Hooker [29 March or 5 April 1846]
- From J. D. Hooker [25 March 1846]
- To C. G. Ehrenberg 25[–31?] March [1846]
- From J. D. Hooker [11–15 April 1846]
- To Smith, Elder & Co. 30 March [1846]
- From J. D. Hooker 30 March 1846
- From G. R. Waterhouse [30 March 1846]
- To Thomas Gold Appleton 31 March [1846]
- To George Brettingham Sowerby Jr 31 [March 1846]
- To Edward Holland [after 12 July 1843]
- To J. D. Hooker [May 1846]
- To Ernst Dieffenbach 6 April [1846]
- To J. D. Hooker 10 April [1846]
- To J. D. Hooker [16 April 1846]
- From William Hopkins 27 April 1846
- To J. D. Hooker [19 May 1846]
- To Leonard Horner [23 December 1846 – January 1847]
- From William Hopkins 5 May 1846
- From George Grey 10 May 1846
- To John Higgins 27 May [1846]
- To Emma Darwin [25 June 1846]
- To Emma Darwin [24 June 1846]
- From A. C. V. D. d’Orbigny [June – July 1846]
- From Searles Valentine Wood 5 June 1846
- To Smith, Elder & Co. 6 June [1846]
- From J. F. Stephens to Robert Peel 8 June 1846
- To Richard Owen 21 [June 1846]
- To William Crawford Williamson 23 June [1846]
- To J. D. Hooker [8 or 15 July 1846]
- To Leonard Jenyns [14 or 21 August 1846]
- To John Maurice Herbert [3 September? 1846]
- From Edward Forbes [7 August 1846]
- To Charles Lyell [8 August 1846]
- To Daniel Sharpe 23 August [1848?]
- To Robert Mallet 26 August [1846]
- To Leonard Horner [17 August – 7 September 1846]
- From J. D. Hooker [before 3 September 1846]
- From Edward Forbes [September 1846]
- To J. D. Hooker [3 September 1846]
- To Richard Owen [April? 1848]
- From J. D. Hooker 28 September 1846
- To John Lindley [c. 10 October 1846]
- To Annals and Magazine of Natural History [December 1846]
- To W. B. Carpenter [October–December 1846]
- To Robert FitzRoy 1 October 1846
- To J. D. Hooker [2 October 1846]
- To Charles Lyell [3 October 1846]
- To J. S. Henslow [5 October 1846]
- To J. D. Hooker [6 October 1846]
- To J. D. Hooker [8 October 1846]
- To A. C. Ramsay 10 October [1846]
- To Leonard Jenyns 17 October [1846]
- To Joseph Beete Jukes [18 October 1846]
- To Smith, Elder & Co. [19 October 1846]
- To J. D. Hooker [26 October 1846]
- To Librarian, Royal Society of London 27 October [1856]
- To Robert FitzRoy 28 October [1846]
- To J. D. Hooker [18 October 1846]
- To Daniel Sharpe [1 November 1846]
- To J. L. Stokes 3 November 1846
- To Daniel Sharpe [4 November 1846]
- To J. D. Hooker [6 November 1846]
- From J. L. Stokes 6 November 1846
- To J. L. Stokes [c. 26 November 1846]
- To George Grey 10 November 1846
- To J. D. Hooker [12 November 1846]
- To Smith, Elder & Co. 13 November [1845]
- To J. D. Hooker [14 November 1846]
- To J. D. Hooker [15 November 1846]
- To John Murray 17 November [1856–7]
- From John Higgins 17 November 1856
- To J. D. Hooker [17 November 1846]
- To John Murray 20 November [1856–7]
- To Catherine Darwin [22 November 1846]
- To Robert FitzRoy 23 November [1846]
- To J. D. Hooker [23 November 1846]
- From J. D. Hooker [24 November 1846]
- To David Thomas Ansted 25 November [1846]
- To Richard Owen 25 November [1846]
- To Francis Wedgwood 27 November [1846]
- To J. D. Hooker [December 1846]
- To J. D. Hooker [December 1846 – January 1847]
- To John Higgins 12 December [1846]
- To A. C. Ramsay 21 December [1846]
- To John Murray 30 December [1846]
- To Robert Hutton [1847 – 12 November 1848]
- To Harriet Lubbock [December 1848–9]
- To Josiah Wedgwood III [20? August 1847]
- To Josiah Wedgwood III [22 June – 10 August 1847]
- To Richard Owen [1847?]
- To J. S. Bowerbank [January–August 1848]
- DCP-LETT-1046
- To J. F. Royle [16 April – 21 May 1847]
- To Leonard Horner [January 1847]
- DCP-LETT-1049
- To William Benjamin Carpenter [January? 1847]
- To J. L. Stokes 2 January [1847]
- To Charles Lyell [23 January 1847]
- To Daniel Sharpe [19 January 1847]
- To Charles Lyell [on or before 20 January 1847]
- To Bernhard Studer 20 January [1847]
- To Leonard Jenyns 21 [January 1847]
- To Charles Lyell [24 January 1847]
- To J. D. Hooker [17 February 1847]
- To J. D. Hooker 8 [February 1847]
- To Ernst Dieffenbach 9 February [1847]
- To Charles Nichols, Geological Society 10 February [1847]
- To Richard Owen 12 February [1847]
- From Henry Allen Wedgwood 21 February 1847
- To Francisco Javier Muñiz 26 February 1847
- To J. D. Hooker [28 February 1847]
- To Robert Chambers [28 February 1847]
- From J. D. Hooker [c. 4 March 1847]
- To Thomas Salt [March 1847]
- From J. D. Hooker [1 March 1847]
- To J. D. Hooker [1 March 1847]
- To Gardeners’ Chronicle and Agricultural Gazette [before 6 March 1847]
- To Charles Lyell [7 March 1847]
- To John Russell [10 March 1847]
- To J. D. Hooker [14 March 1847]
- To Gustav von Leonhard 20 March [1847]
- To Bernhard Studer 21 March [1847]
- To J. D. Hooker [23 March 1847]
- To John Wickham Flower 23 March [1851]
- To J. D. Hooker [25 March 1847]
- To J. D. Hooker 7 April [1847]
- To William Henry Harvey [7 April 1847]
- From H. C. Watson to J. D. Hooker 12 April 1847
- To J. D. Hooker 15 [July 1847]
- To Robert Patterson 17 April [1847]
- To J. D. Hooker [18 April 1847]
- To Daniel Sharpe [23 January 1847]
- From J. D. Hooker [after 1 May 1847]
- To J. D. Hooker [1 May 1847]
- To J. D. Hooker [6 May 1847]
- To J. D. Hooker [12 May 1847]
- To J. D. Hooker [22 May 1847]
- To Richard Owen [1849?]
- To John Higgins 25 May [1847]
- To John Allen 25 May 1847
- To J. D. Hooker [25 May 1847]
- To J. D. Hooker [28 May 1847]
- To Charles Lyell [2 June 1847]
- To J. D. Hooker [2 June 1847]
- To J. D. Hooker [10 June 1847]
- To J. D. Hooker [12 June 1847]
- From J. D. Hooker 16 June 1847
- To J. D. Hooker [17 June 1847]
- To J. D. Hooker [19 June 1847]
- To James Clark Ross [27 June 1847]
- To J. D. Hooker [19 July 1847]
- To Bernhard Studer 4 July [1847]
- To Henry Denny 21 July [1847]
- To Thomas Salt 27 July [1849]
- To J. D. Hooker 28 July [1847]
- To J. D. Hooker [4 August 1847]
- To J. D. Hooker [12 August 1847]
- To Bernhard Studer 13 August [1847]
- To J. F. Royle 14 August [1847]
- To Josiah Wedgwood III 14 August [1847]
- To John Forbes Royle [12 April – 17 May 1847]
- To J. D. Hooker [18 August 1847]
- To H. T. De la Beche 19 August [1847]
- To Josiah Wedgwood III [22 August? 1847]
- To J. F. Royle 1 September [1847]
- To Mary Anne Theresa Whitby 2 September [1847]
- To John Thomas Quekett 7 September [1848]
- From Robert Chambers to David Milne 7 September 1847
- To Charles Lyell 8 [September 1847]
- To John Higgins 10 September [1847]
- To J. D. Hooker [12 September 1847]
- To Robert Chambers 11 September 1847
- To David Milne 20 [September 1847]
- To the Scotsman [after 20 September 1847]
- To Mary Elizabeth Lyell [4 October 1847]
- To J. D. Hooker [5 October 1847]
- From Robert Chambers 5 October 1847
- To Joseph Beete Jukes 8 October [1847]
- To Charles Lyell [11 October 1847]
- To J. D. Hooker [6 or 13 October 1847]
- To M. A. T. Whitby 14 October [1847]
- To J. D. Hooker [21 October 1847]
- To J. D. Hooker [25 October 1847]
- To J. D. Hooker [31 October 1847]
- To Emma Darwin [31 October 1847]
- To J. D. Hooker [6 November 1847]
- To J. D. Hooker [8 November 1847]
- To George Grey 13 November 1847
- To Henri Milne-Edwards 18 November [1847]
- To Abraham Clapham [29 October 1847?]
- To John Higgins 11 December [1847]
- To J. E. Gray 18 December 1847
- To J. C. Ross 31 December 1847
- To John Innes [1848?]
- To Josiah Wedgwood III [July 1848]
- To George Warde Norman [1848]
- To G. R. Waterhouse [January–June 1850]
- From Susan Elizabeth Darwin [1848?]
- To John Edward Gray [18 December 1847]
- From J. G. Malcolmson 2 January 1840
- To James Smith of Jordanhill 28 January [1848]
- To William Crawford Williamson 31 January [1848]
- To Richard Owen [4 February 1848]
- To J. F. W. Herschel 4 February 1848
- To Andrew Crombie Ramsay 4 February [1848]
- To J. E. Gray 5 [or 6] February 1848
- To James Smith of Jordanhill 6 February [1848]
- To George Robert Waterhouse [6 February 1848]
- To J. E. Gray [5 or 6 February 1848]
- To W. C. Williamson 12 February [1848]
- To John Phillips 14 February [1848]
- From J. D. Hooker 20 February – 16 [March] 1848
- To James Clark Ross 25 February [1848]
- To John Higgins 28 February [1848]
- To Robert Chambers [14 February – 20 March 1848]
- From John Higgins 1 March 1848
- To John Phillips 7 March [1848]
- To John Phillips [12? March 1848]
- To J. F. W. Herschel [21 March 1848]
- To Robert Ball 25 March [1848]
- To Richard Owen [26 March 1848]
- To William Alexander Baillie Hamilton 28 March [1848]
- To John Stevens Henslow [1 April 1848]
- To Richard Owen [2 April 1848]
- To A. C. Ramsay 7 April [1848]
- To H. T. De la Beche 7 April [1848]
- To John Phillips [7 or 14 April 1848]
- To Edward Cresy [May 1848]
- To John Innes [8 May 1848]
- To J. F. W. Herschel 7 May [1848]
- To J. D. Hooker 10 May 1848
- To J. F. W. Herschel 11 May [1848]
- To Emma Darwin [20–1 May 1848]
- To Emma Darwin [22 May 1848]
- To Emma Darwin [23 May 1848]
- To Emma Darwin [25 May 1848]
- To Emma Darwin [27–8 May 1848]
- To Charles Lyell [21? June 1848]
- To Robert Chambers [June 1848]
- To J. F. W. Herschel 6 June [1848]
- To John Higgins 6 June [1848]
- To John Higgins 14 June [1848]
- To Charles Lyell [16 June 1848]
- To J. E. Gray 28 [June 1848]
- To Edward Cresy [5 or 12 July 1848]
- To John Russell [10 July 1848]
- To J. S. Henslow 2 July [1848]
- To S. P. Woodward 10 July 1848
- To Gardeners’ Chronicle 13 July [1848]
- From William Buckland 15 July [1848]
- To Edward Cresy [15 July 1848]
- To Edward Cresy [20 July 1848]
- From J. D. Hooker 24 July [1848]
- To M. A. T. Whitby 12 August [1849]
- To Francis Boott 20 August 1848
- From J. E. Gray 26 August 1848
- To J. E. Gray 29 August [1848]
- To Charles Lyell [24 September 1848]
- To Henri Milne-Edwards 1 September [1848]
- To Augustus Addison Gould 3 September [1848]
- From William Thompson 29 September 1848
- To William Hellier Baily 5 October 1848
- To J. D. Hooker 6 October [1848]
- From J. D. Hooker 13 October 1848
- To ? [15 or 22 October 1848]
- To Jean Louis Rodolphe Agassiz 22 October 1848
- From Emily Catherine Darwin [12 November 1848]
- From Catherine Darwin [13 November 1848]
- To Emma Darwin [17 November 1848]
- To Maria Hooker [17 December 1848]
- To J. W. Lubbock [December 1848–9]
- To John Higgins 6 December [1848]
- To J. W. Lubbock [December 1848–9]
- To Josiah Wedgwood III [after 12 July 1851]
- To Edward Forbes [1 May – 5 June 1851]
- To Hugh Edwin Strickland 29 January [1849]
- From H. E. Strickland 31 January 1849
- To Smith, Elder & Company [16 February 1849]
- To W. J. Hooker [c. February 1849]
- From J. D. Hooker 3 February 1849
- From J. D. Hooker 3 February 1849
- To H. E. Strickland [4 February 1849]
- To W. D. Fox 6 February [1849]
- From Thomas Salt to E. A. Darwin 8 February 1849
- From H. E. Strickland 8 February 1849
- To Lovell Augustus Reeve [before 14 March 1849]
- To Johannes Peter Müller 10 February [1849]
- To H. E. Strickland 10 February [1849]
- From H. E. Strickland 15 February 1849
- To H. E. Strickland [19 February 1849]
- To Richard Owen [24 February 1849]
- To J. S. Bowerbank 24 February [1849]
- To Peter Lund Simmonds 25 February [1849]
- To ? [28 February 1849]
- To Richard Owen [January – 23 March 1850]
- To William Thompson [1 March 1849]
- To Henri Milne-Edwards 2 March [1849]
- From Emma Darwin to W. D. Fox [6 March 1849]
- To Susan Darwin [19 March 1849]
- To W. D. Fox 24 [March 1849]
- To J. D. Hooker 28 March 1849
- To Syms Covington 30 March 1849
- To Edward Cresy [24 June 1849]
- To J. D. Hooker 9 April 1849
- To W. D. Fox 18 April [1849]
- To J. S. Henslow 6 May 1849
- To Roderick Impey Murchison [before 30 May 1849]
- To Charles Lyell [14–28 June 1849]
- To John Higgins 5 June [1849]
- To John Murray 7 June [1849]
- To John Murray 12 June [1849]
- To J. F. W. Herschel 13 June [1849]
- From J. D. Hooker 24 June 1849
- To Charles Lyell 3 July [1849]
- To W. D. Fox 7 [July 1849]
- To Emily Harriet Stanhope 9 August [1849]
- To James Dwight Dana 12 August [1849]
- To A. A. Gould 20 August [1849]
- To Charles Lyell [2 September 1849]
- To Albany Hancock [21 September 1849]
- To J. S. Henslow [26 September 1849]
- To Johan Georg Forchhammer 25 September [1849]
- To Albany Hancock 29 September [1849]
- From J. D. Hooker 30 September 1849
- To Hugh Cuming [October? 1849]
- To J. D. Dana 8 October 1849
- To J. D. Hooker 12 October 1849
- To C. R. Weld [1849]
- To [Auguste Daubrée] [1849?]
- To George Ransome 25 October [1849]
- To Albany Hancock [29 or 30 October 1849]
- To Swale and Wilson [on or before 24 October 1849]
- To Charles Lyell [1 November 1849]
- To Hugh Cuming [4 November 1849]
- To M. E. Lyell [24 October 1849]
- To N. T. Wetherell 8 [August 1850]
- To John Richardson 4 November [1851]
- To J. G. Forchhammer 12 November [1849]
- To Sven Lovén 12 November 1849
- To Thomas Salt 12 November [1849]
- From J. G. Forchhammer [15 November 1849]
- To Charles Lyell [18 November 1849]
- To Thomas Salt 19 November [1849]
- To J. S. Henslow 20 November [1849]
- To J. G. Forchhammer 1 December [1849]
- To Robert Fitch 3 December [1849]
- To Charles Lyell 4 December [1849]
- To J. D. Dana 5 December [1849]
- To Charles Lyell [7? December 1849]
- To Abraham Clapham 10 December [1849]
- To John Higgins 10 December [1849]
- To Albany Hancock 25 December [1849]
- To Japetus Steenstrup 30 December [1849]
- DCP-LETT-1282
- To J. S. Henslow [7 October 1849]
- To J. S. Henslow [before 12 October 1849]
- To W. J. Hooker [January 1850]
- To Adam White [January–March 1850]
- To Charles Lyell [3 January 1850]
- To Robert Fitch 6 January [1850]
- From Charles Pickering 9 January 1850
- To Robert Fitch 10 January [1850]
- To Robert Fitch 15 January [1850]
- To W. D. Fox [17 January 1850]
- To J. S. Henslow 17 January [1850]
- To J. S. Bowerbank 19 January [1850]
- To Robert Fitch [23 January 1850]
- To J. S. Bowerbank [24 January – 7 March 1850]
- To Japetus Steenstrup 25 January [1850]
- To Robert Fitch [28 January 1850]
- To Robert Fitch 1 February [1850]
- To J. D. Hooker 3 February [1850]
- To Robert Fitch [5 February 1850]
- To Robert Fitch [6 February 1850]
- To James de Carle Sowerby 12 February [1850]
- To the Palaeontographical Society [before 22 February 1850]
- To J. D. Dana 24 February [1850]
- To J. S. Bowerbank 25 February [1850]
- To J. de C. Sowerby 3 March [1850]
- To Wilhelm Dunker 3 March [1850]
- To Charles Henry Lardner Woodd 4 March 1850
- To Charles Lyell [8 March 1850]
- From Abraham Clapham 8 March 1850
- To J. S. Bowerbank [8 March 1850]
- To Albany Hancock [26 January – March 1850]
- To J. S. Bowerbank 17 March [1850]
- To Robert Fitch 17 March [1850]
- To S. P. Woodward 21 March [1850]
- To Robert Fitch [13? April 1850]
- To Albany Hancock [31 March or 7 April 1850]
- To Japetus Steenstrup 3 April [1850]
- From William Masters 3 April 1850
- From J. D. Hooker 6 and 7 April 1850
- To Thomas Salt 7 April [1850]
- To A. A. Gould 8 April [1850]
- To Albany Hancock 15 [April 1850]
- To Richard Owen 28 April [1850]
- To W. D. Fox [May 1850]
- To J. de C. Sowerby 4 May [1850]
- To Robert Fitch 5 May [1850]
- To John Higgins 9 May [1850]
- To Albany Hancock 12 May [1850]
- To J. G. Forchhammer 20 May [1850]
- To the Secretary, Royal Geographical Society 20 May [1850]
- To Japetus Steenstrup 20 May [1850]
- To W. J. Hooker 22 May [1850]
- To Albany Hancock 25 May [1856]
- To J. de C. Sowerby [26 May 1850]
- To John Higgins 27 May [1850]
- To George Ransome 27 [August 1849]
- To J. de C. Sowerby [13 April 1850]
- To Charles Lyell [8 June 1850]
- To J. de C. Sowerby [8] June [1850]
- To J. D. Hooker 13 June [1850]
- To Charles Spence Bate 13 June [1851]
- To Louis Agassiz 15 June [1850]
- To Japetus Steenstrup 15 June [1850]
- To J. de C. Sowerby 8 July [1850]
- To Robert Downie 14 July [1850]
- To William Harris 6 August [1850]
- To C. S. Bate 18 August [1851]
- To J. de C. Sowerby [12 or 19 August 1850]
- To J. de C. Sowerby 27 August [1850]
- To J. de C. Sowerby [28 August or 4 September 1850]
- To Maria Hooker 31 August [1850]
- To J. de C. Sowerby 1 September [1850]
- To Japetus Steenstrup 1 September [1850]
- To W. D. Fox 4 September [1850]
- To J. S. Bowerbank 10 September [1850]
- To J. de C. Sowerby 10 September [1850]
- To Richard Owen 10 September [1850]
- To Richard Owen 10 September [1850]
- To Richard Owen [before 28 April 1850]
- To J. de C. Sowerby 12 September [1850]
- To Wilhelm Bernhard Rudolph Hadrian Dunker 20 September 1850
- To J. de C. Sowerby 23 September [1850]
- From the Ray Society [after 7 October 1850]
- To W. D. Fox 10 October [1850]
- To Edwin Lankester, Ray Society [18–22 October 1850]
- To Edwin Lankester, Ray Society 27 October [1850]
- To John Lubbock 10 [September 1853]
- To Robert Fitch 3 November [1850]
- From the Ray Society [4–6 November 1850]
- To Edwin Lankester, Ray Society 7 November [1850]
- To J. de C. Sowerby 11 November [1850]
- To Robert Fitch 11 November [1850]
- To Adam Sedgwick 11 October [1850]
- To Syms Covington 23 November 1850
- From J. D. Hooker 26 November 1850
- To Salt & Son 26 November [1850]
- To Josiah Wedgwood III 1 December [1850]
- To Edwin Lankester, Ray Society 5 December [1850]
- To John Higgins 13 December [1850]
- To Robert Fitch [December? 1850]
- To John Higgins 21 December [1850]
- To Albany Hancock 25 December [1850]
- To Josiah Wedgwood III 25 [April 1853]
- To E. A. Darwin 26 [April 1853]
- From J. D. Dana [before 29 December 1850]
- To J. D. Dana 29 December [1850]
- From J. D. Hooker [c. April 1851]
- To J. S. Bowerbank [24 April 1850]
- To John Edward Gray [January 1851]
- To Charles Lyell [8 April 1851]
- To John Mumford 1 January 1851
- To Rowland Hill 6 January 1851
- To James de Carle Sowerby 21 January [1851]
- To Robert Fitch 24 January [1851]
- To J. de C. Sowerby 10 February [1851]
- To J. de C. Sowerby 13 February [1851]
- To William Jackson Hooker 17 February [1851]
- To J. de C. Sowerby 19 February [1851]
- To S. P. Woodward 3 March [1851]
- To William Harris 4 March [1851]
- To George Robert Waterhouse 5 March [1867?]
- To Edwin Lankester, Ray Society 4 March [1851]
- To J. W. Flower [11 March 1851?]
- To W. D. Fox [27 March 1851]
- To Japetus Steenstrup 3 April 1851
- To Wilhelm Bernhard Rudolph Hadrian Dunker 5 April [1851]
- To Emma Darwin [17 April 1851]
- To Emma Darwin [18 April 1851]
- To Emma Darwin [18 April 1851]
- To Emma Darwin [19 April 1851]
- To Erasmus Alvey Darwin 19 April 1851
- From Emma Darwin [19 April 1851]
- From Emma Darwin [19 April 1851]
- To Emma Darwin [20 April 1851]
- To Frances Mackintosh Wedgwood [21 April 1851]
- To Emma Darwin [21 April 1851]
- To Emma Darwin [21 April 1851]
- From Emma Darwin [21 April 1851]
- From Emma Darwin [22–3 April 1851]
- From Emma Darwin [23 April 1851]
- To Emma Darwin [23 April 1851]
- To Fanny Mackintosh Wedgwood [24 April 1851]
- From Emma Darwin [24 April 1851]
- From Sarah Elizabeth (Elizabeth) Wedgwood [24 April 1851]
- To E. A. Darwin [25 April 1851]
- To Fanny Mackintosh Wedgwood [25 April 1851]
- From E. A. Darwin [25 April 1851]
- From Fanny Mackintosh Wedgwood 25 April [1851]
- From Susan Elizabeth Darwin [25 April 1851]
- From Emily Catherine Darwin [25? April 1851]
- To Elizabeth Mary Thorley 26 April [1851]
- From Emily Catherine Darwin [27 April 1851]
- From Fanny Mackintosh Wedgwood 28 [April 1851]
- To W. D. Fox 29 April [1851]
- To Edward Adolphus Seymour Seymour May 1851
- To Hensleigh and Fanny Mackintosh Wedgwood 1 May [1851]
- To J. S. Dismorr 6 May [1851]
- To J. S. Dismorr 15 May [1851]
- To A. S. Horner 25 May [1851]
- To Robert Ball 26 May [1851]
- To A. A. Gould 2 June [1851]
- To W. B. R. H. Dunker 2 June [1851]
- To John Higgins 7 June 1851
- To Albany Hancock 8 June [1851]
- To Robert Ball 8 June [1851]
- To S. P. Woodward 9 June [1851]
- To J. S. Dismorr 13 June [1851]
- To Albany Hancock 22 June [1851]
- To J. S. Bowerbank 25 June [1851]
- To James Smith of Jordanhill 4 July [1851]
- To the Palaeontographical Society [before 31 January 1851]
- From J. D. Hooker [late August – early September 1851]
- To J. S. Bowerbank 7 July [1851]
- To Thomas Henry Huxley 17 July [1851]
- To Edwin Lankester, Ray Society 19 July [1851]
- To Edwin Lankester, Ray Society 22 July [1851]
- To George Newport 24 July [1851]
- To Edwin Lankester, Ray Society 26 July [1851]
- To Edwin Lankester, Ray Society 30 July [1851]
- To Edwin Lankester, Ray Society [7 August 1851]
- To Edwin Lankester, Ray Society [9 August 1851]
- To George Newport 12 August [1851]
- To E. W. V. Harcourt 19 August [1856]
- From John Gwyn Jeffreys 7 September 1851
- To James Dwight Dana 9 September [1851]
- To Japetus Steenstrup 9 September [1851]
- To J. S. Bowerbank, Ray Society 28 September [1851]
- To William Erasmus Darwin 3 October [1851]
- To T. H. Huxley 9 October 1851
- To Daniel Sharpe 16 October [1851]
- To Japetus Steenstrup 16 October [1851]
- To James Hilton 25 October [1851?]
- From J. D. Hooker [November 1851]
- To Japetus Steenstrup 4 November [1851]
- To Thomas Salt 4 November 1851
- To T. H. Huxley 22 November [1851]
- To John Stevens Henslow 11 December [1851]
- To ? 19 December [1852 or 1854]
- To Christian Ferdinand Friedrich von Krauss 21 December [1851]
- To Thomas Salt 24 December 1851
- To Adam White 26 December 1851
- To J. S. Henslow [1852–60]
- To Thomas Salt 26 December [1851]
- To John Richardson 30 December [1851]
- To William and Julius Fairbeard [October 1855 – May 1856]
- From James McNab? [c. May 1855]
- To Japetus Steenstrup 3 January [1852]
- To Gardeners’ Chronicle [before 10 January 1852]
- To C. S. Bate 10 January [1853]
- To Edward Forbes 23 January [1852?]
- To Edwin Lankester, Ray Society 30 January [1852]
- To J. D. Dana 15 February [1852]
- To W. E. Darwin 24 [February 1852]
- To A. A. Gould 29 February [1852]
- To W. D. Fox 7 March [1852]
- To Syms Covington 14 March 1852
- DCP-LETT-1478
- From Japetus Steenstrup 8 April 1852
- To George Crawford Hyndman 16 April [1852]
- To T. H. Huxley 23 April [1853]
- To John William Parker 5 May [1852]
- To J. D. Dana 8 May [1852]
- To Henry Norton Shaw, Secretary, Royal Geographical Society 17 May [1852]
- To John Higgins 19 June [1852]
- To Richard Owen 17 July [1852]
- From John Higgins 27 July 1852
- To John Higgins 29 July [1852]
- From John Higgins 31 July 1852
- To John Higgins 2 August [1852]
- To George Ransome 5 August [1852]
- To W. E. Darwin 27 August [1852]
- To George Robert Waterhouse 8 September [1852]
- To Josiah Wedgwood III 21 October [1852]
- To W. D. Fox 24 [October 1852]
- To Josiah Wedgwood III 20 November 1852
- To George Johnston 23 November 1852
- To J. D. Dana 25 November [1852]
- To Joseph Augustin Hubert de Bosquet 17 December [1852]
- To John Higgins 18 December [1852]
- To Albany Hancock 25 December [1852]
- To J. D. Hooker [April 1852]
- To Albany Hancock 10 January [1853]
- To Albany Hancock 29 January [1853]
- To W. D. Fox 29 January [1853]
- To Thomas Salt 31 January [1853]
- To Albany Hancock 10 February [1853]
- To Albany Hancock 12 February [1853]
- To Charles Lyell 15 February [1853]
- To Josiah Wedgwood III 18 February 1853
- To Albany Hancock 25 February [1853]
- To W. B. Tegetmeier 7 March [1858]
- From Albany Hancock 25 February 1853
- To J. S. Henslow 8 March [1853]
- To Thomas Salt 15 March [1853]
- From R. Carden 18 March 1853
- To Edwin Lankester, Ray Society 19 March [1853]
- To Charles Wigley 21 March 1853
- To Charles Lyell 24 March [1853]
- To Albany Hancock 30 March [1853]
- To J. S. Henslow 31 March [1853]
- To C. S. Bate 1 April [1853]
- To Andrew Crombie Ramsay 9 April [1853]
- To John Higgins 11 April [1853]
- To T. H. Huxley 11 April [1853]
- To J. A. H. de Bosquet 15 April [1853]
- From E. A. Darwin 26 April 1853
- To Gardeners’ Chronicle [c. 27 April 1853]
- To J. A. H. de Bosquet 7 June [1853]
- To Charles Lyell 7 June [1853]
- To John Higgins 14 June [1853]
- To J. A. H. de Bosquet 18 June 1853
- To C. S. Bate 7 July [1853]
- To W. D. Fox 17 July [1853]
- To J. A. H. de Bosquet 17 July 1853
- To John Murray 24 July [1853]
- To Francis Galton 24 July [1853]
- To W. D. Fox 29 [July 1853]
- To Richard Owen 30 July [1853]
- To W. D. Fox 10 August [1853]
- To C. S. Bate 30 August [1853]
- To J. D. Hooker [9 October 1853]
- To John William Lubbock 6 September [1853]
- To George Johnston 6 September 1853
- To J. D. Hooker 25 September [1853]
- To J. D. Dana 27 September [1853]
- To J. D. Dana 10 October [1853]
- To J. D. Hooker 10 [October 1853]
- To J. W. Lubbock 11 October [1853]
- To J. A. H. de Bosquet 13 October [1853]
- To Syms Covington 21 October 1853
- From J. D. Hooker [4 November 1853]
- To J. D. Hooker 5 November [1853]
- To John Higgins 2–3 December [1853]
- To J. D. Dana 6 December [1853]
- To J. A. H. de Bosquet 24 December 1853
- From J. D. Dana [before 6 December 1855]
- To Edward Cresy [before May 1848?]
- From J. D. Hooker [after 11 December 1854]
- To Fanny Mackintosh Wedgwood 18 [August 1854]
- To J. A. H. de Bosquet 19 January [1854]
- To the Ray Society [before 23 January 1854]
- To Edward Sabine 31 January [1854]
- From Bartholomew James Sulivan 2 February [1855]
- To Edward Sabine 5 February [1854]
- To J. D. Hooker [9 or 16 February 1854]
- To Charles Lyell 18 February [1854]
- To J. S. Henslow 20 February [1854]
- To P. G. King 21 February 1854
- To Francis Galton 22 February [1855]
- From Francis Galton to Charles John Andersson [after 22 February 1855]
- To the Palaeontographical Society [before 24 February 1854]
- To J. D. Hooker 1 March [1854]
- From J. D. Hooker [26 February 1854]
- To J. D. Hooker 10 March [1854]
- From J. D. Hooker [c. 25 March 1854]
- To John Higgins 18 March [1854]
- To John Higgins 23 March [1854]
- To J. D. Hooker 26 March [1854]
- To J. W. Lubbock 28 March [1854]
- To J. E. Gray 28 March [1854]
- To Robert Patterson 6 April [1854]
- To John Higgins 9 April [1854]
- To William Robert Grove 26 April [1854]
- To Josiah Wedgwood III 1 May [1854]
- To Adolf Wilhelm Hermann Kolbe 5 May [1847]
- To S. P. Woodward 6 May 1854
- To J. D. Hooker 17 June [1860]
- From J. D. Hooker [24 June 1854]
- To J. D. Hooker 27 [June 1854]
- To Edward Sabine 28 June [1854]
- To J. D. Hooker 29 [May 1854]
- From J. D. Hooker [29 June 1854]
- To J. D. Hooker 7 July [1854]
- To Thomas Salt 12 July [1854]
- To J. A. H. de Bosquet 13 August [1854]
- To ? 16 August [1854–8]
- To Robert Patterson 21 August [1854]
- To Mrs Stutchbury 22 August 1854
- To Albany Hancock 24 August [1854]
- From J. D. Hooker 25 August 1854
- To John Price 26 [August 1854]
- To G. R. Waterhouse 29 August [1854]
- From Charles Cardale Babington [c. June 1855]
- To John Lubbock [September 1854]
- To J. S. Henslow 2 September [1854]
- To T. H. Huxley 2 September [1854]
- To J. D. Hooker 7 September [1854]
- To Japetus Steenstrup 7 September [1854]
- To T. H. Huxley 8 September [1854]
- To A. A. Gould 9 September [1854]
- To T. H. Huxley 13 September [1854]
- To a librarian [early September? 1854]
- From Richard Thomas Lowe 19 September 1854
- To John Higgins 5 October [1854]
- To George Henry Turnbull 28 October [1854]
- To J. D. Hooker [November–December 1854]
- To J. D. Hooker 5 November [1854]
- From G. R. Waterhouse 11 November 1854
- To Daniel Sharpe 12 November [1854]
- From J. D. Hooker [6 November 1854]
- To J. D. Hooker 15 November [1854]
- To J. S. Henslow 17 November [1854]
- To Walter Baldock Durrant Mantell 17 November 1854
- From H. C. Watson [19 November 1854]
- From H. C. Watson 20 November [1854]
- To A. C. Ramsay 22 November [1854]
- From J. D. Hooker [15 November 1854]
- From James R. Garrett to Robert Patterson 1 December 1854
- To J. D. Hooker 2 December [1854]
- To J. D. Hooker 4 December [1854]
- To Saba Holland 4 December [1854]
- From J. D. Hooker 5 December [1854]
- To J. D. Hooker 11 [December 1854]
- To G. H. Turnbull 12 December [1854]
- From Edward Hewitt 18 December 1857
- To John Higgins 25 December 1854
- To H. C. Watson [17 July 1861]
- To C. J. F. Bunbury [before 9 May 1856]
- DCP-LETT-1618
- To W. E. Darwin [before 11 September 1857]
- To John Lubbock [29 July 1856]
- From Edmund Saul Dixon [September–October 1848]
- From J. D. Hooker [16 November 1856]
- DCP-LETT-1623
- From Arthur Edward Knox [c. March 1855–7?]
- From G. R. Waterhouse [after 2 March 1855]
- To Charles Lyell 10 January [1855]
- To Francis Galton 1 January [1855]
- To J. W. Lubbock 10 January [1855]
- From J. D. Hooker [3 November 1854]
- To Charles Lyell 14 January [1855]
- To J. W. Lubbock 15 [January 1855]
- From George Gulliver 20 January [1856]
- To Charles Lyell [21 January – 11 February 1855]
- From John Davy 30 January 1855
- To T. H. Huxley 20 February [1855]
- From John Rae 21 February 1855
- To Syms Covington 28 February 1855
- From J. D. Hooker [before 7 March 1855]
- To W. E. Darwin 1 March [1853]
- From Thomas Vernon Wollaston 2 March [1855]
- To G. R. Waterhouse 4 March [1855]
- From G. R. Waterhouse [7 March 1855]
- To J. D. Hooker 7 March [1855]
- From J. D. Hooker [before 17 March 1855]
- To T. H. Huxley 8 March [1855]
- From W. D. Fox 8 March [1856]
- To J. S. Henslow 13 March 1855
- To Arthur Henfrey 17 March [1855]
- To Leonard Horner 18 [March 1855]
- To the Royal Society 19 March 1855
- To W. D. Fox 19 March [1855]
- From John Davy 21 March 1855
- DCP-LETT-1652
- To John Davy 25 March [1855]
- To John Davy 26 March [1855]
- To J. S. Henslow 26 March [1855]
- To W. D. Fox 27 March [1855]
- To Hugh Miller 29 March [1855]
- To Arthur Henfrey 31 March [1855]
- To T. H. Huxley 31 March [1855]
- To W. E. Darwin [25 April 1855]
- To J. D. Hooker 7 April [1855]
- To M. J. Berkeley 7 April [1855]
- To W. B. D. Mantell 10 April [1856]
- From C. J. F. Bunbury 10 April 1855
- To M. J. Berkeley 11 April [1855]
- To Gardeners’ Chronicle 11 April [1855]
- To J. D. Hooker 13 April [1855]
- To T. H. Huxley 18 April [1855]
- To J. D. Hooker 19 April [1855]
- From Edward Blyth 21 April 1855
- To J. D. Hooker 24 April [1855]
- From Charles Lyell 23 April 1855
- To John Lubbock 24 April [1855]
- To Asa Gray 25 April [1855]
- To W. D. Fox 26 April [1855]
- To Leonard Horner 27 April [1855]
- To Edward Cresy 29 April [1853]
- To W. D. Fox 7 May [1855]
- To Charles Lyell 8 May [1855]
- To J. D. Hooker 11 May [1855]
- To J. D. Hooker 15 [May 1855]
- To Edward Cresy 15 May [1853]
- To W. D. Fox 17 May [1855]
- To Gardeners’ Chronicle 21 May [1855]
- From Asa Gray 22 May 1855
- To W. D. Fox 23 May [1855]
- To Gardeners’ Chronicle [before 26 May 1855]
- To John Higgins 26 May 1855
- To J. D. Hooker 27 May [1855]
- To W. E. Darwin 29 [November 1855]
- From Frederick Bashford and Edward Blyth [after 3 July 1855]
- To Hugh Falconer [December? 1844]
- To J. D. Hooker 2 June [1855]
- To J. D. Hooker 5 June [1855]
- From J. D. Hooker [6–9 June 1855]
- To Asa Gray 8 June [1855]
- To J. D. Hooker 10 June [1855]
- To T. H. Huxley 10 June [1855]
- To W. D. Fox 11 June [1855]
- To M. J. Berkeley 12 June [1855]
- To J. D. Hooker 15 [June 1855]
- From Margaretta Hare Morris to Richard Chandler Alexander 17 June 1855
- To J. D. Hooker 23 [June 1855]
- From Thomas Bell Salter 25 June 1855
- To W. D. Fox 27 [June 1855]
- To J. S. Henslow 27 June [1855]
- From J. S. Henslow 29 June 1855
- From Asa Gray 30 June 1855
- To J. S. Henslow 2 July [1855]
- From Thomas Carew Hunt 2 July 1855
- To M. J. Berkeley 3 July [1855]
- To J. D. Hooker 5 July [1855]
- To J. S. Henslow 7 July [1855]
- To G. R. Waterhouse 8 July [1855]
- From J. D. Hooker [8 July 1855]
- From H. C. Watson 11 July [1855]
- To J. S. Henslow 11 July [1855]
- To J. D. Hooker 14 [July 1855]
- To J. S. Henslow 14 July [1855]
- To J. D. Hooker 18 [July 1855]
- To John Lubbock 19 [July 1855]
- From Robert Hunt 19 July 1855
- To J. D. Hooker 19 July [1855]
- To Gardeners’ Chronicle [before 21 July 1855]
- To A. A. Gould 21 July 1855
- To Asa Gray 21 July [1855]
- To J. S. Henslow 21 July [1855]
- To Robert Hunt 22 July [1855]
- To W. D. Fox 22 [July 1855]
- To J. S. Henslow 23 [July 1855]
- From Robert Hunt 24 July 1855
- To J. D. Hooker 28 [July 1855]
- To J. S. Henslow 28 July [1855]
- To W. D. Fox 31 July [1855]
- To Robert Hunt 31 July [1855]
- From Edward Blyth 4 August 1855
- To J. D. Hooker 9 [December 1855]
- To J. D. Hooker 10 August [1855]
- To J. D. Hooker 11 August [1855]
- From John Cattell 13 August 1855
- From H. C. Watson 13 August 1855
- DCP-LETT-1740A
- To J. D. Hooker 14 [August 1855]
- To J. D. Hooker 18 [October 1855]
- From H. C. Watson 17 August 1855
- To the Council of the Royal Society 18 August 1855
- To W. D. Fox 22 August [1855]
- From Edward Blyth 22–3 August 1855
- From H. C. Watson 23 August 1855
- To J. S. Henslow 23 [August or September 1855]
- To Asa Gray 24 August [1855]
- To H. C. Watson [26 August 1855]
- To William Bernhard Tegetmeier 31 August [1855]
- From Edward Blyth 7 September [1855]
- To Henry Allen Wedgwood 5 September [1855]
- To W. B. Tegetmeier [13 September 1855]
- From Edward Blyth [22 September 1855]
- From John Rice Crowe 27 September 1855
- To T. H. Huxley 29 [September 1855]
- From H. C. Watson 2 October 1855
- To T. H. Huxley 3 [September 1855]
- From Robert McAndrew 6 October 1855
- From Edward Blyth 8 October 1855
- From Edward Blyth [30 September or 7 October 1855]
- From Edward Blyth [1–8 October 1855]
- To J. D. Hooker 10 October [1855]
- From H. C. Watson 11 October 1855
- To J. S. Henslow 12 October [1855]
- To W. D. Fox 14 October [1855]
- To Henry Tibbats Stainton 20 October [1855]
- To [William Baxter or W. W. Baxter?] 24 October [1842–5 or 1853 or 1855–68?]
- To T. C. Eyton 25 October [1855]
- To J. S. Henslow 29 October [1855]
- To Gardeners’ Chronicle [before 3 November 1855]
- To Charles Lyell 4 November [1855]
- To J. D. Hooker 6 November [1855]
- To J. D. Hooker 8 [November 1855]
- From H. C. Watson 8 November 1855
- From Edward Blyth [8 November 1855]
- To J. R. Crowe 9 November 1855
- To J. S. Henslow 10 November [1855]
- To J. S. Henslow 12 November 1855
- To Gardeners’ Chronicle 13 November [1855]
- To J. D. Hooker 14 November [1855]
- To W. B. Tegetmeier 16 November [1855]
- To the Secretary, Royal Society 18 November [1855]
- To Armand de Quatrefages 20 November [1855]
- To Gardeners’ Chronicle 21 November [1855]
- To T. C. Eyton 26 November [1855]
- To J. D. Hooker [23 November 1855]
- To John Price 29 November [1842–55]
- To Gardeners’ Chronicle [before 1 December 1855]
- To W. B. Tegetmeier [2 December 1855]
- To T. C. Eyton 3 December [1855]
- From William Henry Benson 5 December 1855
- To W. B. Tegetmeier 6 December [1855]
- From Edward Blyth 8 December 1855
- To T. C. Eyton 9 December [1855]
- To Edgar Leopold Layard 9 December 1855
- To George Henry Kendrick Thwaites 10 December 1855
- To George Gulliver 18 December [1855]
- To J. S. Henslow 18 [December 1855]
- To Charles Augustus Murray 24 December 1855
- From George Gordon 24 December 1855
- To H. N. Shaw, Secretary, Royal Geographical Society 25 December [1855]
- To J. S. Henslow 26 December [1855]
- To George Gulliver 27 December [1855]
- To Gardeners’ Chronicle [before 29 December 1855]
- To Gardeners’ Chronicle [before 29 December 1855]
- To William Erasmus Darwin [26 February 1856]
- To W. E. Darwin [17 February 1857]
- From Thomas Vernon Wollaston [February 1856]
- From S. P. Woodward [after 4 June 1856]
- From H. C. Watson [after 23 March 1858]
- DCP-LETT-1809
- To Frances Mackintosh Wedgwood 18 [August 1856 – January 1858]
- From Edward Blyth [22 October 1855]
- CD memorandum [December 1855]
- To William Bernhard Tegetmeier 1 January [1856]
- To John Maurice Herbert 2 January [1856]
- To W. D. Fox 3 January [1856]
- To John Stevens Henslow 3 January [1856]
- To John Davy 3 January [1856]
- From Edward Blyth 8 January [1856]
- DCP-LETT-1818
- From Charles Wade Crump to Edward Blyth [before 8 January 1856]
- From John Davy 10 January 1856
- To W. B. Tegetmeier 14 January [1856]
- To John Edward Gray 14 January [1856]
- To W. B. Tegetmeier [1 February 1856]
- To John Phillips 18 January [1856]
- To J. E. Gray 19 January [1856]
- To J. S. Henslow 22 January [1856]
- To Walter Elliot 23 January 1856
- From Edward Blyth 23 January 1856
- DCP-LETT-1826
- To Katharine Murray Lyell 26 January [1856]
- To John Phillips 28 January [1856]
- To William Yarrell 6 [February 1856]
- To Samuel Birch 6 February [1856]
- From Charles James Fox Bunbury 7 February 1856
- To John Lubbock 14 [July 1855]
- From Edward Blyth 23 February 1856
- From Edward Blyth 26 February 1856
- To M. J. Berkeley 29 February [1856]
- From John Morris 1 March 1856
- From M. J. Berkeley 7 March 1856
- To George Henry Kendrick Thwaites 8 March 1856
- From Thomas Hutton 8 March 1856
- To Hugh Falconer 8 March [1845?]
- To Syms Covington 9 March 1856
- To Herbert Spencer 11 March [1856]
- To Samuel Birch [12 March 1856]
- To W. B. Tegetmeier 15 March [1856]
- To W. D. Fox 15 March [1856]
- To M. J. Berkeley 18 March [1856]
- To W. B. Tegetmeier 20 March [1856]
- From Edward Blyth [c. 22 March 1856]
- To C. J. Andersson 25 March [1856]
- To John William Lubbock 2 April [1859]
- To Thomas Henry Huxley 2 April [1856]
- To Walter Baldock Durrant Mantell 3 April [1856]
- From Edward Blyth [3 April 1856]
- From Charles John Andersson [6 April 1856]
- To J. D. Hooker 8 April [1856]
- To Samuel Birch 8 April [1856]
- To T. H. Huxley 9 April [1856]
- From Richard Thomas Lowe 12 April 1856
- To Henry Tibbats Stainton 13 April [1856]
- From C. J. F. Bunbury 16 April 1856
- To Charles Lyell 21 April [1856]
- To C. J. F. Bunbury 21 April [1856]
- To Godfrey Wedgwood 21 April [1856]
- To Edward Sabine 23 April [1856]
- To John Lubbock 24 April [1856]
- To W. B. Tegetmeier 25 April [1856]
- To Miss Holland [May 1856]
- From Charles Lyell 1–2 May 1856
- To Asa Gray 2 May [1856]
- From S. P. Woodward 2 May 1856
- From Laurence Edmondston [before 3 May 1856]
- To Charles Lyell 3 May [1856]
- To Laurence Edmondston 3 May [1856]
- To T. H. Huxley 4 May [1856]
- From J. D. Hooker 7 May 1856
- To J. D. Hooker 9 May [1856]
- To E. W. V. Harcourt 9 May [1856]
- To C. J. F. Bunbury 9 May [1856]
- To Henry Ambrose Oldfield 10 May [1856]
- To W. B. Tegetmeier 11 May [1856]
- To J. D. Hooker 11 May [1856]
- To S. P. Woodward 15 May [1856]
- To J. D. Hooker 21 [May 1856]
- To J. W. Lubbock 27 May [1856]
- To T. H. Huxley 27 May [1856]
- To S. P. Woodward 27 May [1856]
- To John William Lubbock 28 [June 1856 – January 1865?]
- To Francis Galton 28 May [1854]
- To W. B. Tegetmeier 31 May [1856]
- From Edward William Vernon Harcourt 31 May 1856
- To John Lubbock [14 January 1856]
- To J. D. Hooker 1 June [1856]
- To E. W. V. Harcourt 1 June [1856]
- To S. P. Woodward 3 June [1856]
- To W. D. Fox 4 June [1856]
- To W. B. Tegetmeier 4 June [1856]
- From S. P. Woodward 4 June 1856
- To S. P. Woodward [after 4 June 1856]
- From H. C. Watson 5 June 1856
- To W. B. D. Mantell 5 June [1856–9]
- To T. V. Wollaston 6 June [1856]
- To Edgar Leopold Layard 8 June [1856]
- To W. D. Fox 8 [June 1856]
- To John Lubbock [8 June 1856]
- From E. L. Layard [September–October 1856]
- From H. C. Watson 10 June 1856
- To H. C. Watson [after 10 June 1856]
- To John Lubbock 12 [June 1856]
- To E. W. V. Harcourt 12 June [1856]
- To W. D. Fox 14 June [1856]
- To Charles Lyell 16 [June 1856]
- To J. S. Henslow 16 June [1856]
- To J. D. Hooker 17–18 [June 1856]
- From Charles Lyell 17 June 1856
- To Robert Everest? 18 June [1856]
- From H. C. Watson 20 June 1856
- To J. D. Hooker 22 June [1856]
- To W. B. Tegetmeier 24 June [1856]
- To E. W. V. Harcourt 24 June [1856]
- To Charles Lyell 25 June [1856]
- From J. D. Hooker [26 June or 3 July 1856]
- From T. V. Wollaston [27 June 1856]
- From T. V. Wollaston [c. 27 June 1856]
- DCP-LETT-1912B
- To W. B. Tegetmeier [July 1856]
- To T. H. Huxley 1 July [1856]
- To J. E. Gray 1 July [1856]
- From Charles Lyell [1 July 1856]
- From John Henry Gurney 2 July 1856
- To Charles Lyell 5 July [1856]
- To J. D. Hooker 5 [July 1856]
- To J. D. Hooker 5 July [1856]
- DCP-LETT-1919A
- To Charles Lyell 8 July [1856]
- To J. D. Hooker 8 [July 1856]
- To T. H. Huxley 8 July [1856]
- From J. D. Hooker 10 July 1856
- To J. D. Hooker 13 July [1856]
- To James Dwight Dana 14 July [1856]
- To Asa Gray 14 July [1856]
- From S. P. Woodward 15 July 1856
- From S. P. Woodward [15 July 1856]
- From John Richardson 17 July 1856
- To the Secretary, Royal Society 18 July 1856
- To S. P. Woodward 18 July 1856
- To J. D. Hooker 19 July [1856]
- To J. D. Hooker 30 July [1856]
- From Asa Gray [early August 1856]
- To W. B. Tegetmeier [15–22 August 1856]
- From J. S. Henslow 2 August 1856
- From J. D. Hooker 4 August 1856
- To J. D. Hooker 5 August [1856]
- To J. S. Henslow 6 August [1856]
- To J. D. Hooker 7 August [1856]
- To W. B. Tegetmeier 14 August [1856]
- To Ebenezer Norman 17 [August 1856]
- To T. C. Eyton 21 August [1856]
- To W. B. Tegetmeier 23 August [1856]
- To Asa Gray 24 August [1856]
- To J. D. Hooker 26 [July 1856]
- To T. C. Eyton 27 [August 1856]
- To W. B. Tegetmeier 30 August [1856]
- To T. C. Eyton 31 August [1856]
- To John Lubbock 5 September [1856]
- To J. D. Hooker 8 September [1856]
- From J. D. Dana 8 September 1856
- To Joseph Augustin Hubert de Bosquet 9 September [1856]
- From Peter Wallace 10 September 1856
- To Laurence Edmondston 11 September [1856]
- To W. B. Tegetmeier [18 September 1856]
- From Victor de Robillard 20 September 1856
- To W. B. Tegetmeier 21 September [1856]
- To Philip Henry Gosse 22 September [1856]
- From Asa Gray 23 September 1856
- To John Lubbock 23 September [1856]
- From Louis Sulpice Bouton to Charles Tilstone Beke 24 September [1856]
- To P. H. Gosse 28 September [1856]
- To J. D. Hooker 28 September [1856]
- To J. D. Dana 29 September [1856]
- To J. D. Hooker [16 October 1856]
- From J. D. Hooker [early December 1856]
- To W. D. Fox 3 October [1856]
- To T. C. Eyton 5 October [1856]
- To J. D. Hooker 5 October [1856]
- From William Freeman Daniell 8 October – 7 November 1856
- To the Royal Society 8 October [1856?]
- To J. D. Hooker 9 October [1856]
- To ? 9 October [1856]
- To Asa Gray 12 October [1856]
- To J. D. Hooker [early December 1856]
- To W. B. Tegetmeier 15 October [1856]
- To W. B. Tegetmeier 19 October [1856]
- To J. D. Hooker [19 October 1856]
- To W. D. Fox 20 October [1856]
- To John Lubbock 27 October [1856]
- To John Lubbock [1 November 1856]
- To W. B. Tegetmeier 3 November [1856]
- From Asa Gray 4 November 1856
- From J. D. Hooker 9 November 1856
- To Charles Lyell 10 November [1856]
- From H. C. Watson 10 November 1856
- To J. D. Hooker 11–12 November [1856]
- To George Howard Darwin and W. E. Darwin 13 [November 1856]
- From W. F. Daniell 14 November 1856
- To J. D. Hooker 15 November [1856]
- To J. W. Lubbock 18 November [1856]
- To J. D. Hooker 18 November [1856]
- To W. B. Tegetmeier 19 November [1856]
- To John Higgins 19 November [1856]
- From H. C. Watson 19 November 1856
- From J. D. Hooker 22 November 1856
- From Charles Cardale Babington 22 November 1856
- To J. D. Hooker 23 November [1856]
- From John Obadiah Westwood 23 November 1856
- To Asa Gray 24 November [1856]
- To W. E. Darwin 25 [November 1856]
- To John Thompson 26 November [1856]
- From H. C. Watson 26 November 1856
- To George Bentham 26 November [1856]
- From George Howard Darwin [28 November 1856]
- To W. B. Tegetmeier 29 November [1856]
- To George Bentham 30 November [1856]
- To J. S. Henslow [after 6 December 1856]
- DCP-LETT-2007
- To J. D. Hooker 1 December [1856]
- From George Dickie 1 December 1856
- To George Bentham 3 December [1856]
- To W. B. Tegetmeier 4 December [1856]
- To Gardeners’ Chronicle [before 6 December 1856]
- From T. V. Wollaston [11 or 18 December 1856]
- From J. D. Hooker 7 December 1856
- To Harriet Lubbock [8 December 1856]
- From J. D. Dana 8 December 1856
- To T. H. Huxley 9 December [1856]
- To J. D. Hooker 10 December [1856]
- To W. E. Darwin 10 [December 1856]
- To T. H. Huxley 13 [December 1856]
- To J. M. Herbert 18 November [1856]
- To James Dwight Dana 21 December [1856]
- To Thomas Davidson 23 December [1856]
- To W. H. Harvey 24 December [1856]
- To J. D. Hooker 24 December [1856]
- From H. C. Watson [28 December 1856]
- From Thomas Davidson 29 December 1856
- To John Innes [after 16 February 1857]
- From George Robert Waterhouse [April 1844]
- From J. D. Hooker [24 March 1863]
- To John Lubbock [March? 1856]
- To [W. E. Darwin] [1857?]
- From T. V. Wollaston [early November 1856]
- To J. A. H. de Bosquet [before 3 November 1856]
- To Henry Doubleday [before 5 February 1857]
- To J. D. Hooker [after 20 January 1857]
- To Asa Gray 1 January [1857]
- From William Henry Harvey 3 January 1857
- To Armand de Quatrefages 4 January [1856]
- To T. H. Huxley 4 January [1857]
- To Henry Doubleday 8 January [1857]
- To W. H. Harvey 7 January [1857]
- From Richard Hill 10 January 1857
- From Charles Lyell [16 January 1857]
- To J. D. Hooker 17 January [1857]
- To T. H. Huxley 17 January [1857]
- To J. D. Hooker 20 January [1857]
- To William Benjamin Carpenter 26 January [1858]
- From Henry Doubleday 26 January 1857
- To T. H. Huxley 3 February [1857]
- To John Tyndall 4 February [1857]
- From Henry Doubleday 5 February 1857
- To W. B. Tegetmeier 6 February [1857]
- To Bernard Peirce Brent 7 February [1857]
- To W. D. Fox 8 February [1857]
- To Charles Lyell 11 February [1857]
- To W. B. Tegetmeier 11 February [1857]
- From Alfred Christy to W. B. Tegetmeier 11 February 1857
- From Asa Gray 16 February 1857
- To W. B. Tegetmeier 18 February [1857]
- DCP-LETT-2055
- To Syms Covington 22 February 1857
- To W. D. Fox 22 February [1857]
- To Richard Kippist 23 February [1857]
- From Victor de Robillard 26 February 1857
- To Asa Gray [after 15 March 1857]
- To Gardeners’ Chronicle [after 28 February 1857]
- To Robert Patterson 10 March [1857]
- From H. C. Watson 10 March 1857
- From Richard Hill 12 March 1857
- From H. C. Watson to Asa Gray 13 March 1857
- To J. D. Hooker 15 March [1857]
- To J. D. Hooker [21 March 1857]
- To W. B. Tegetmeier 28 [September 1856]
- From James Tenant 31 March 1857
- From Hensleigh Wedgwood [before 29 September 1857]
- From Edwards Crisp 4 April 1857
- To J. D. Dana 5 April [1857]
- To J. D. Hooker 8 April [1857]
- To William Sharpey 9 April [1857]
- From J. D. Hooker [11 April 1857]
- To J. D. Hooker 12 April [1857]
- From T. V. Wollaston [12 April 1857]
- To Charles Lyell 13 April [1857]
- From George Robert Waterhouse 14 April 1857
- To Laurence Edmondston 19 April [1857]
- DCP-LETT-2080
- From James Tenant 23 April 1857
- To P. H. Gosse 27 April [1857]
- From J. D. Dana 27 April 1857
- To J. D. Hooker [29 April 1857]
- To W. D. Fox [30 April 1857]
- To Alfred Russel Wallace 1 May 1857
- To J. D. Hooker [2 May 1857]
- To J. D. Hooker [3 May 1857]
- To Asa Gray 9 May [1857]
- To W. B. Tegetmeier 12 [May 1857]
- To W. E. Darwin 13 May [1857]
- To J. D. Hooker 16 [May 1857]
- To W. B. Tegetmeier 18 May [1857]
- To William Sharpey 22 May [1857]
- To J. D. Dana 25 May [1857]
- To W. E. Darwin [November 1857]
- From James Hunt [before 29 December 1857]
- To W. E. Darwin 21 [July 1857]
- From Asa Gray 1 June 1857
- To J. D. Hooker 2 June [1857]
- To William Sharpey 2 June [1857]
- To J. D. Hooker 3 June [1857]
- To J. D. Hooker 5 June [1857]
- To T. C. Eyton 9 June [1857]
- From Asa Gray [c. 24 May 1857]
- To Gardeners’ Chronicle [before 13 June 1857]
- From H. C. Watson 14 June [1857]
- To James Dwight Dana 15 June [1851]
- To W. B. Tegetmeier [18 June 1857]
- To Asa Gray 18 June [1857]
- To W. B. Tegetmeier 23 June [1857]
- To W. B. Tegetmeier 25 [June 1857]
- To J. D. Hooker 25 June [1857]
- To T. C. Eyton 26 [June 1857]
- From J. D. Hooker [27] June 1857
- To W. B. Tegetmeier [19 July 1857]
- CD memorandum July 1857
- To J. D. Hooker 1 July [1857]
- To J. D. Hooker 5 July [1857]
- To T. H. Huxley 5 July [1857]
- From T. H. Huxley 7 July 1857
- From Asa Gray 7 July 1857
- To Francis Galton 7 July [1857]
- To T. H. Huxley 9 July [1857]
- To John Lubbock 14 [July 1857]
- To J. D. Hooker 14 July [1857]
- To Asa Gray 20 July [1857]
- To T. C. Eyton 22 [July 1857]
- To Gardeners’ Chronicle [before 25 July 1857]
- To W. B. Tegetmeier 27 July [1857]
- From Asa Gray [August 1857]
- To J. D. Hooker 1 August [1857]
- To Laurence Edmondston 2 August [1857]
- From Henrietta Emma Darwin [2 August 1857]
- To J. S. Henslow 10 August [1857]
- From T. V. Wollaston [November–December 1857]
- To J. D. Hooker 22 August [1857]
- To W. E. Darwin [before 29 October 1857]
- To Asa Gray 5 September [1857]
- To J. D. Hooker 6 September [1857]
- To Secretary, Academia Caesarea Leopoldino-Carolina Naturae Curiosorum 8 September [1857]
- To George Varenne Reed 8 September [1856]
- To J. D. Hooker 11 September [1857]
- To T. H. Huxley 15 September [1857]
- From Robert Schlagintweit 25 September 1857
- To William Walmisley Baxter 23 September [1857–9?]
- To T. H. Huxley 26 September [1857]
- From T. H. Huxley [before 3 October 1857]
- From A. R. Wallace [27 September 1857]
- To W. B. Tegetmeier 29 September [1857]
- To W. E. Darwin 29 [October 1857]
- To J. D. Hooker 30 September [1857]
- To John Lubbock [22 November 1857]
- To T. H. Huxley 3 October [1857]
- To James Buckman 4 October [1857]
- To Skeffington Poole 13 October [1858]
- To J. S. Henslow 14 October [1857]
- To J. S. Henslow 18 October [1857]
- To Gardeners’ Chronicle 18 October [1857]
- To J. D. Hooker 20 October [1857]
- To J. D. Hooker [23 October 1857]
- From Bernard Peirce Brent 23 October 1857
- From Walter White 26 October 1857
- From Thomas Glover 26 October 1857
- To W. D. Fox 30 October [1857]
- DCP-LETT-2162
- DCP-LETT-2163
- To T. C. Eyton 2 November [1857]
- From Henry Coe 4 November 1857
- To T. H. Huxley [before 12 November 1857]
- From Frederick Smith 10 November 1857
- To Robert Patterson 12 November [1857]
- To Gardeners’ Chronicle [before 12 November 1857]
- To J. D. Hooker 14 [November 1857]
- From Henry Coe 14 November 1857
- From Williams & Norgate 17 November 1857
- To W. B. Tegetmeier 21 November [1857]
- To J. D. Hooker 21 November [1857]
- To Hugh Falconer 23 November 1857
- To C. S. Bate 29 November [1857]
- To Asa Gray 29 November [1857]
- To George Bentham 1 December [1857]
- From James Buckman [1 December 1857]
- From J. D. Hooker [2 December 1857]
- From Richard Bishop to Charles Spence Bate 3 December 1857
- To J. D. Hooker 4 December [1857]
- From J. D. Hooker [6 December 1857]
- To John Higgins 9 December 1857
- To J. D. Hooker 9 December [1857]
- To E. W. V. Harcourt 13 December [1857]
- From H. C. Watson 14 December [1857]
- To George Bentham 15 December [1857]
- To E. W. V. Harcourt 15 December [1857]
- To T. H. Huxley 16 December [1857]
- From George Bentham [16 or 17 December 1857]
- To W. D. Fox 17 December [1857]
- From J. D. Hooker [17–23 December 1857]
- To George Bentham 18 December [1857]
- From H. C. Watson 20 December [1857]
- DCP-LETT-2191
- To A. R. Wallace 22 December 1857
- From Edward Hewitt 22 December 1857
- To J. D. Hooker 25 December [1857]
- From Erasmus Alvey Darwin [May–June 1858]
- From Robert Scot Skirving [1860?]
- From R. S. Skirving [1860?]
- To J. D. Hooker [June 1857]
- From H. C. Watson 3 January 1858
- To a librarian [c. June 1858 or later]
- From Edward Blyth [8 January 1858]
- To J. D. Hooker 12 January [1858]
- To E. W. V. Harcourt 13 January [1858]
- To W. D. Fox 14 January [1858]
- To J. D. Hooker 15 January [1858]
- From J. D. Hooker 15 January 1858
- To William Bernhard Tegetmeier 17 January [1858]
- To William Sharpey, Secretary, Royal Society 24 January [1857]
- To John Stevens Henslow 25 January [1858]
- To W. D. Fox 31 January [1858]
- To J. D. Hooker [17 February 1858]
- To J. D. Hooker 4 [February 1858]
- To George Henry Kendrick Thwaites 7 February [1858]
- To J. D. Hooker 9 February [1858]
- From George Robert Waterhouse 10 February 1858
- From William Balfour Baikie 11 February 1858
- To William Erasmus Darwin 11 [February 1858]
- From G. R. Waterhouse 13 February 1858
- To Louis Agassiz 21 February [1858]
- To Asa Gray 21 February [1858]
- To W. D. Fox 22 February [1858]
- To Charles Cardale Babington 22 February [1858]
- From Edward Blyth 22 February 1858
- To J. D. Hooker 23 February [1858]
- From H. C. Watson 23 February [1858]
- To Thomas Henry Huxley 24 February [1858]
- From J. D. Hooker [25] February 1858
- From Frederick Smith 26 February 1858
- To W. E. Darwin 27 [February 1858]
- To J. D. Hooker 28 February [1858]
- To W. D. Fox 28 February [1858]
- DCP-LETT-2230
- From C. C. Babington 3 March 1858
- To John Innes 4 March [1859]
- To C. C. Babington 4 March [1858]
- To the Secretary, Royal Society 5 March 1858
- To J. D. Hooker 5 [March 1858]
- To Frederick Smith [before 9 March 1858]
- To Trenham Reeks? 10 March [1858]
- To J. D. Hooker 10 [March 1858]
- To Richard Kippist 10 March [1858]
- To J. D. Hooker 11 March [1858]
- From J. D. Hooker [14 March 1858]
- To Edward Sabine 16 March [1857]
- To J. D. Hooker 16 [March 1858]
- From J. D. Hooker 18 March 1858
- To the Secretary, Royal Society 22 March 1858
- From H. C. Watson 23 March 1858
- To ? 26 March [1858?]
- To George Busk, Linnean Society 30 March [1858]
- To J. D. Hooker 31 March [1858]
- From Asa Gray [before 3 April 1858]
- From Leonard Jenyns [before 18 April 1858]
- To Leonard Jenyns 1 April [1858]
- To Asa Gray 4 April [1858]
- To Leonard Jenyns 9 April [1858]
- To J. D. Hooker 10 April [1858]
- To W. B. Tegetmeier 14 April [1858]
- To W. H. Miller [15 April 1858]
- To W. D. Fox 16 April [1858]
- To Henry Norton Shaw, Royal Geographical Society 16 April [1858]
- From G. R. Waterhouse 17 April 1858
- To Leonard Jenyns 18 April [1858]
- To W. B. Tegetmeier [21 April 1858]
- To Emma Darwin [28 April 1858]
- To Charles Lyell 26 April [1858]
- To J. D. Hooker 26 [April 1858]
- To Leonard Jenyns [28 April 1858]
- To W. E. Darwin [26 April 1858]
- To W. E. Darwin [26 May 1858]
- To W. E. Darwin [20 June 1858]
- To W. E. Darwin [3 May 1858]
- To J. D. Hooker 6 May [1858]
- To W. D. Fox 8 May [1858]
- To W. B. Tegetmeier 9 May [1858]
- From W. H. Miller [14 May 1858]
- To W. E. Darwin 14 [May 1858]
- To J. D. Hooker 16 May [1858]
- To J. D. Hooker 18 [May 1858]
- To Syms Covington 18 May [1858]
- From J. D. Hooker [before 6 May 1858]
- From E. A. Darwin [before 8 June 1858]
- To J. D. Hooker 3 June [1858]
- To W. B. Tegetmeier 5 June [1858]
- To W. B. Tegetmeier 8 [June 1858]
- To J. D. Hooker 8 [June 1858]
- From E. A. Darwin [8 June 1858]
- From E. A. Darwin [after 8 June 1858]
- To John Higgins 9 June 1858
- From John Lubbock 10 June 1858
- To Charles Lyell 18 [June 1858]
- To Roderick Impey Murchison 19 June [1858]
- From E. A. Darwin [19 June 1858]
- From Asa Gray 21 June 1858
- To W. B. Tegetmeier 22 June [1858]
- To J. D. Hooker 23 [June 1858]
- To A. C. Ramsay 24 June [1859]
- To R. I. Murchison 24 [June 1858]
- To W. D. Fox 24 June [1858]
- To Charles Lyell [25 June 1858]
- To Charles Lyell 26 [June 1858]
- To W. D. Fox 27 [June 1858]
- To J. D. Hooker [29 June 1858]
- To J. D. Hooker [29 June 1858]
- From J. D. Hooker and Charles Lyell to the Linnean Society 30 June 1858
- To W. D. Fox 2 July [1858]
- To W. B. Tegetmeier 4 [July 1858]
- To Asa Gray 4 July 1858
- To J. D. Hooker 5 July [1858]
- To W. D. Fox 6 July [1858]
- To Hugh Falconer [1845?–7 or 1857–64]
- To J. D. Hooker 13 [July 1858]
- From J. D. Hooker 13–15 July 1858
- From William Swale 13 July 1858
- To Charles Lyell 18 July [1858]
- To J. D. Hooker [18 July 1858]
- To J. D. Hooker 21 July [1858]
- To W. D. Fox 21 [July 1858]
- To J. D. Hooker [5 August 1858]
- To J. D. Hooker 30 [July 1858]
- To William Jackson Hooker [30 July 1858]
- From J. D. Hooker 31 July 1858
- From G. R. Waterhouse 2 August 1858
- To J. D. Hooker [10 August 1858]
- To T. C. Eyton 4 August [1858]
- To J. S. Henslow 4 August [1858]
- To Asa Gray 11 August [1858]
- From Charles Moore 11 August 1858
- To Trenham Reeks? 13 August [1858]
- To John Phillips 1 September [1858]
- To W. B. Tegetmeier 8 September [1858]
- From Henry Coe 18 September 1858
- From Willem Hendrik de Vriese to J. D. Hooker 21 September 1858
- To W. E. Darwin 22 [September 1858]
- To J. S. Henslow 25 September [1857]
- To the Secretary, Royal Society 28 September 1858
- To John Lubbock [November 1858]
- To W. B. Tegetmeier 2 October [1858]
- To T. C. Eyton 4 October [1858]
- To [J. D. Hooker] [before 6 October 1858]
- To W. E. Darwin 6 October [1858]
- To J. D. Hooker 6 October [1858]
- From Henry Coe 6 October 1858
- From Alfred Russel Wallace to J. D. Hooker 6 October 1858
- To T. C. Eyton 11 October [1858]
- To J. D. Hooker 12 [October 1858]
- From Henry Coe 12 October 1858
- To W. E. Darwin 15 [October 1858]
- To George Bentham 15 October [1858]
- From T. C. Eyton 16 October 1858
- To W. B. Tegetmeier 17 [October 1858]
- To J. D. Hooker 20 [October 1858]
- From Henry Coe 20 October 1858
- To Skeffington Poole 20 October [1858]
- From Skeffington Poole [21 October 1858]
- To Skeffington Poole 22 October [1858]
- To T. H. Huxley 23 October [1858]
- From Skeffington Poole 23 October 1858
- DCP-LETT-2348
- To Skeffington Poole [27 October 1858]
- To J. D. Hooker 29 [October 1858]
- To W. E. Darwin [30 October 1858]
- To J. D. Hooker 2 November [1858]
- To T. H. Huxley 3 November [1858]
- To W. E. Darwin 5 [November 1858]
- To James Egan 8 November [1858]
- To J. D. Hooker 9[–10] November [1858]
- To J. S. Henslow 9 November [1858]
- To Robert Monsey Rolfe 10 November [1858]
- From J. D. Hooker 12 November 1858
- To Gardeners’ Chronicle [before 13 November 1858]
- To W. D. Fox 13 November [1858]
- To J. D. Hooker 14 November [1858]
- To J. D. Hooker [14 November 1858]
- To W. B. Tegetmeier 16 November [1858]
- From Samuel Wells 17 November 1858
- To Asa Gray 18 November [1858]
- To the Chancellor of the Exchequer 18 November 1858
- From William Allport Leighton 19 November 1858
- From J. D. Hooker [20 November 1858]
- To W. A. Leighton 21 November [1858]
- To J. D. Hooker [23 November 1858]
- From John Pearson 23 November 1858
- To J. D. Hooker 24–5 November [1858]
- To James Egan 25 November [1858]
- To Herbert Spencer 25 November [1858]
- From Samuel Wells 25 November 1858
- To W. B. Tegetmeier 27 [November 1858]
- To T. H. Huxley 1 December [1858]
- To J. D. Hooker 3 December [1858]
- To John Higgins 8 December 1858
- To Ferdinand Jakob Heinrich von Mueller 8 December [1857]
- To W. E. Darwin [9 December 1858]
- To Walter Elliot 12 December [1858]
- From T. H. Huxley 17 December 1858
- From J. D. Hooker 22 December 1858
- To W. B. Tegetmeier 24 December [1858]
- To J. D. Hooker 24 December [1858]
- From J. D. Hooker [26 December 1858]
- To J. D. Hooker 27 [November 1858]
- From Andrew Crombie Ramsay 29 December 1858
- To J. D. Hooker 31 December [1858]
- From Hensleigh Wedgwood [January? 1860]
- To John Lubbock [August–September 1858]
- To W. H. Miller [after 5 June 1860]
- To John Lubbock [6 March 1857]
- To W. E. Darwin [3 November 1858]
- From John Lubbock [after 28 April 1860?]
- To [Mary Holland] [April 1860]
- To John Lubbock 12 [August 1857]
- To John Lubbock 30 [March? 1858]
- From A. C. Ramsay 6 January 1859
- From Richard Hill 10 January 1859
- To Syms Covington 16 January 1859
- To J. D. Hooker 20 January [1859]
- To John Phillips 21 January [1859]
- To J. D. Hooker 23 January [1859]
- From J. D. Hooker 25 January 1859
- To A. R. Wallace 25 January [1859]
- To J. D. Hooker 28 January [1859]
- To W. B. Tegetmeier 4 February [1859]
- To John Lubbock [6 February 1859]
- From John Lubbock 8 February 1859
- To John Phillips 8 February [1859]
- To John Lubbock 9 February [1859]
- To W. D. Fox [12 February 1859]
- To Emma Darwin [25 April 1858]
- To W. E. Darwin [13 February 1859]
- To William Erasmus Darwin 17 February [1861]
- To Mary Butler 20 February [1859]
- To W. B. Tegetmeier 21 [February 1859]
- To Maria Hooker 21 February [1859?]
- To John Lubbock 21 [March 1859]
- To George Howard Darwin 24 [February 1859]
- From T. M. Brewer to A. A. Gould [March 1858]
- To J. D. Hooker 2 March [1859]
- To W. B. Tegetmeier 5 March [1859]
- To J. D. Hooker 5 [March 1859]
- To T. H. Huxley 8 March [1859]
- To John Lubbock 8 March [1859]
- From T. H. Huxley [9–12 March 1859]
- From J. D. Hooker [9 March 1859]
- To J. D. Hooker 11 March [1859]
- To T. H. Huxley 13 [March 1859]
- To W. E. Darwin 14 [March 1859]
- To J. D. Hooker 15 March [1859]
- From John Lubbock 15 March 1859
- To John Lubbock 16 [March 1859]
- To Henry Denny 23 March [1865]
- To W. D. Fox 24 [March 1859]
- To Charles Lyell 28 March [1859]
- To J. S. Bowerbank 29 March [1859]
- To Charles Lyell 30 March [1859]
- To J. D. Hooker 30 March [1859]
- To John Murray 31 March [1859]
- To W. E. Darwin [5 May 1859]
- From John Murray 1 April 1859
- From J. D. Hooker [8–11 April 1859]
- To John Murray 2 April [1859]
- To J. D. Hooker 2 April [1859]
- To John Murray 5 April [1859]
- To A. A. Gould 6 April [1858]
- To A. R. Wallace 6 April 1859
- To J. D. Hooker 7 April [1859]
- To W. B. Tegetmeier 9 April [1859]
- To W. D. Fox 10 April [1859]
- To J. D. Hooker 11 April [1859]
- To J. D. Hooker 12 [April 1859]
- CD memorandum 24 April 1859
- To Benjamin Collins Brodie 26 April [1859]
- To John Murray 29 April [1859]
- To Frederick Smith 29 April [1859]
- From Frederick Smith 30 April 1859
- To J. D. Hooker 3 May [1859]
- From Whitwell Elwin to John Murray 3 May 1859
- To J. D. Hooker 6 May [1859]
- To John Murray 6 May [1859]
- To John Murray 10 May [1859]
- To J. D. Hooker 11 May [1859]
- To John Murray 14 May [1859]
- To J. D. Hooker 18 [May 1859]
- To John Murray 18 May [1859]
- To J. D. Hooker [26 May 1859]
- To John Murray 31 May [1859]
- To T. H. Huxley 2 June [1859]
- To W. E. Darwin 3 June [1859]
- To W. H. Miller 5 June [1860]
- To John Murray 14 June [1859]
- From Charles Lyell to T. H. Huxley 17 June 1859
- From Robert Shedden Scrimgeour & John Shedden Scrimgeour & Co. 17 June 1859
- To John Higgins 15 June 1859
- To Charles Lyell 21 June [1859]
- To J. D. Hooker 22 [June 1859]
- To Entomologist’s Weekly Intelligencer [before 25 June 1859]
- To Charles Lyell 28 [June 1859]
- To George Varenne Reed 1 July [1859]
- To J. D. Hooker 2 July [1859]
- To W. E. Darwin 7 July [1859]
- To John Higgins 13 July [1859]
- From John Higgins 15 July 1859
- To John Higgins 18 July [1859]
- To John Murray 25 [July 1859]
- To Robert Main 27 July [1859]
- To J. D. Hooker 28 [July 1859]
- To W. B. Tegetmeier 5 August [1859]
- To Richard Hill 8 August [1859]
- To A. R. Wallace 9 August 1859
- To John Lubbock 11 August [1857]
- To Adam Sedgwick 24 August [1859]
- To W. E. Darwin 25 [August 1859]
- To John Murray 31 August [1859]
- To J. D. Hooker 1 September [1859]
- To Charles Lyell 2 September [1859]
- To John Murray 2 September [1859]
- To John Murray 10 September [1859]
- To Mary Butler 11 September [1859]
- To J. D. Hooker 11 [September 1859]
- To W. B. Tegetmeier 13 September [1859]
- To Charles Lyell 20 September [1859]
- To W. D. Fox 23 September [1859]
- To Charles Lyell 25 September [1859]
- To G. V. Reed 26 September [1859]
- To Charles Lyell 30 September [1859]
- To W. E. Darwin [23 October – 20 November 1859]
- To W. E. Darwin [14 October 1859]
- To Elizabeth Drysdale [22 or 29 October 1859]
- DCP-LETT-2498F
- To Georgina Tollet 1 October [1846?–71]
- To James Paget [15 October – 19 November 1859]
- From Charles Lyell 3 October 1859
- DCP-LETT-2501F
- To W. D. Fox [6 October 1859]
- To Charles Lyell 11 October [1859]
- To J. D. Hooker 15 October [1859]
- To T. H. Huxley 15 October [1859]
- To John Murray 15 October [1859]
- To Charles Lyell 20 October [1859]
- To John Murray 20 October [1859]
- From Charles Lyell 22 October 1859
- To J. D. Hooker [23 October 1859]
- To Charles Lyell 25 October [1859]
- From Hugh Falconer 25 October and 12 November [1859]
- To J. D. Hooker [27 October or 3 November 1859]
- From Charles Lyell 28 October 1859
- To Charles Lyell 31 [October 1859]
- From John Murray 2 November 1859
- To John Murray [3 November 1859]
- To Richard Owen 11 November [1859]
- To James Dwight Dana 11 November [1859]
- To J. F. W. Herschel 11 November [1859]
- To François Jules Pictet de la Rive 11 November [1859]
- To Louis Agassiz 11 November [1859]
- To Asa Gray 11 November [1859]
- To John Phillips 11 November [1859]
- To J. S. Henslow 11 November 1859
- To Alphonse de Candolle 11 November [1859]
- To Hugh Falconer 11 November [1859]
- To Adam Sedgwick 11 November [1859]
- From Richard Owen 12 November 1859
- To John Lubbock [19 November 1859]
- To Leonard Jenyns 13 November [1859]
- To A. R. Wallace 13 November 1859
- DCP-LETT-2530
- To John Murray 14 November [1859]
- To John Lubbock [22 November 1859]
- To W. D. Fox [16 November 1859]
- From Charles Kingsley 18 November 1859
- To W. B. Carpenter 18 November [1859]
- To W. B. Carpenter 19 November [1859]
- To J. D. Hooker [20 November 1859]
- To Caroline Sarah Wedgwood [after 21 November 1859]
- From J. D. Hooker [21 November 1859]
- From H. C. Watson 21 November [1859]
- From Charles Lyell 21 November 1859
- To ? [after 2 November 1859]
- To J. D. Hooker [22 November 1859]
- To Charles Lyell 23 November [1859]
- From T. H. Huxley 23 November 1859
- From E. A. Darwin 23 November [1859]
- To T. C. Eyton 24 [November 1859]
- To Charles Lyell 24 [November 1859]
- From Adam Sedgwick 24 November 1859
- To John Murray 24 November [1859]
- To T. H. Huxley 24 [November 1859]
- From Charles Lyell [22 November 1859]
- To Charles Lyell 25 [November 1859]
- To T. H. Huxley 25 November [1859]
- To T. H. Huxley 25 November [1859]
- To Adam Sedgwick 26 November [1859]
- To John Phillips 26 November [1859]
- From Richard Hill 26 November 1859
- To T. H. Huxley 27 November [1859]
- To Charles Lyell [28 November 1859]
- To Charles Lyell 29 [November 1859]
- To John Phillips 29 November [1859]
- To Charles Kingsley 30 November [1859]
- From H. C. Watson 30 November [1859]
- From Asa Gray [25 February 1868 or later]
- To W. H. Miller 1 December [1860]
- To Charles Kingsley 1 December [1859]
- To Charles Lyell 2 December [1859]
- To John Murray 2 December [1859]
- To Charles Lyell [3 December 1859]
- To W. B. Carpenter 3 December [1859]
- To Charles James Fox Bunbury 3 December [1859]
- To John Murray 4 December [1859]
- To John Higgins 4 December 1859
- To Armand de Quatrefages 5 December [1859]
- To T. H. Huxley [5 December 1859]
- From Francis Galton 9 December 1859
- To T. H. Huxley [9 December 1859]
- To Charles Lyell [10 December 1859]
- To Richard Owen 10 December [1859]
- To John Murray 10 December 1859
- From Henry Holland 10 December [1859]
- From J. D. Hooker [12 December 1859]
- To Richard Owen 13 December [1859]
- To Francis Galton 13 December [1859]
- To T. H. Huxley 13 December [1859]
- To J. D. Hooker 14 December [1859]
- To John Lubbock 14 December [1859]
- To T. H. Huxley 16 December [1859]
- To John Lubbock 17 December [1859]
- To Hugh Falconer 17 December [1859]
- To William Henry Sykes 20 December [1859]
- From J. D. Hooker [20 December 1859]
- From William Jardine 20 December 1859
- To J. D. Hooker 21 [December 1859]
- To Asa Gray 21 December [1859]
- To Charles Lyell 22 [December 1859]
- To John Murray 22 December [1859]
- To J. D. Hooker 23 [December 1859]
- To Leonard Horner 23 December [1859]
- To John Murray 24 December [1859]
- To F. J. Pictet de la Rive 24 December [1859]
- To Asa Gray 24 December [1859]
- To T. H. Huxley 24 December [1859]
- DCP-LETT-2601
- To J. D. Hooker 25 [December 1859]
- To T. H. Huxley 25 December [1859]
- To W. D. Fox 25 December [1859]
- To John Higgins 26 December 1859
- To J. D. Hooker 26 [December 1859]
- To John Murray 26 [December 1859]
- To Charles Lyell 27 [December 1859]
- To W. H. Miller 27 December [1860]
- To J. D. Hooker 28 [December 1859]
- To T. H. Huxley 28 December [1859]
- To Charles Lyell 29 [December 1859]
- To J. D. Hooker 29 [December 1859]
- To John Gwyn Jeffreys 29 December [1859]
- To J. D. Dana 30 December [1859]
- To John Murray 30 [January 1860]
- To W. H. Miller 31 December [1860]
- To Leonard Horner [1856–7]
- DCP-LETT-2619
- To Edward Cresy [12 November 1860]
- From David Forbes [after 11 December 1860]
- From William Masters [after 7 April 1860]
- From Daniel Oliver [15–16 October 1860]
- From Bernard Peirce Brent [1860?]
- To ? [1860 or later]
- From J. B. Bacon to Elizabeth Drysdale [1857–62?]
- From Alfred Russel Wallace [December? 1860]
- To Frederick Temple [c. 28 February 1861]
- From W. C. L. Martin [1859–61]
- To S. P. Woodward 9 [July 1860]
- From Asa Gray [10 January 1860]
- To John Murray [25 January 1860]
- To Thomas Henry Huxley 1 January [1860]
- To [John Hawkshaw?] 1 January [1860]
- From William Whewell 2 January 1860
- To J. D. Hooker 3 January [1860]
- From H. C. Watson [3? January 1860]
- To Charles Lyell 4 [January 1860]
- From Leonard Jenyns 4 January 1860
- To J. T. Smith 4 January 1860
- From Asa Gray to J. D. Hooker 5 January 1860
- To H. C. Watson [5–11 January 1860]
- To Thomas Bridges 6 January 1860
- To William Benjamin Carpenter 6 January [1860]
- From Joshua Toulmin Smith 6 January 1860
- From Thomas Bridges [October 1860 or later]
- To Leonard Jenyns 7 January [1860]
- To Asa Gray 7 January [1860]
- To T. H. Huxley 9 January [1860]
- To Charles Lyell 10 January [1860]
- To J. S. Henslow 10 January [1859]
- To T. H. Huxley 11 January [1860]
- To Isidore Geoffroy Saint-Hilaire 12 January [1860]
- To Charles Lyell 14 January [1860]
- To J. D. Hooker 14 [January 1860]
- To Edward Cresy 15 January [1860]
- To Armand de Quatrefages 15 January [1860]
- To Williams and Norgate 16 January [1860]
- DCP-LETT-2653A
- To Baden Powell 18 January [1860]
- To Baden Powell 18 January [1860]
- To William Bernhard Tegetmeier 20 January [1860]
- To Edward Cresy 20 January [1860]
- To Gardeners’ Chronicle [14–19 January 1860]
- To Armand de Quatrefages 21 January [1860]
- To T. H. Huxley 21 [January 1860]
- To Daniel Oliver 22 January [1861]
- To T. H. Huxley 23 January [1863 or 1864]
- From Asa Gray 23 January 1860
- To John Murray 23 [January 1860]
- To R. H. Meade 23 January [1860?]
- From John Murray 27 January 1860
- To Asa Gray 28 January [1860]
- To Isidore Geoffroy Saint-Hilaire 28 January [1860]
- To Williams and Norgate 29 [January 1860]
- To J. S. Henslow 29 January [1860]
- To Charles Griffin & Co. 29 January [1860]
- To John Murray 29 January [1860]
- From Charles James Fox Bunbury 30 January 1860
- To George Henry Kendrick Thwaites 31 January [1868]
- To J. D. Hooker 31 [January 1860]
- To J. D. Hooker [22 January 1860]
- To T. H. Huxley [26 January 1860]
- From George Robert Waterhouse [February 1860]
- To William Erasmus Darwin [4 March 1860]
- To Asa Gray 1 February [1860]
- To Neil Arnott 16 February [1860?]
- To Richard Kippist? 1 February [1860]
- To T. H. Huxley 2 [February 1860]
- To Herbert Spencer 2 February [1860]
- To John Murray 3 February [1860]
- To J. S. Henslow 3 February [1860]
- From Philip Lutley Sclater [3? February 1860]
- To P. L. Sclater 4 February [1860]
- To T. H. Huxley 4 February [1860]
- To John Murray 4 February [1860]
- To Heinrich Georg Bronn 4 February [1860]
- To Charles Lyell 4 February [1860]
- To John Murray 5 February [1860]
- To J. D. Hooker 8 February [1860]
- To C. J. F. Bunbury 9 February [1860]
- To J. S. Henslow 9 February [1860]
- From P. L. Sclater 11 February 1860
- To Charles Lyell 12 [February 1860]
- From Charles Lyell [13–14 February 1860]
- To P. L. Sclater 14 February [1860]
- To J. D. Hooker 14 February [1860]
- From George Henry Kendrick Thwaites [14 February 1860]
- To H. G. Bronn 14 February [1860]
- To H. G. Bronn [c. 25 February 1860]
- To Charles Lyell 15 and 16 [February 1860]
- To Asa Gray [8 or 9 February 1860]
- To Smith, Elder, and Company? 17 February [1860]
- To Charles Lyell 18 [and 19 February 1860]
- To Asa Gray 18 February [1860]
- From Francois Jules Pictet de la Rive 19 February 1860
- To J. D. Hooker [20 February 1860]
- From Asa Gray 20 February 1860
- From Andrew Crombie Ramsay 21 February 1860
- From Herbert Spencer 22 February 1860
- To Charles Lyell 23 February [1860]
- To J. D. Hooker [23 February 1860]
- To F. J. Pictet de la Rive 23 February [1860]
- From James Lamont [23 February 1860]
- To A. C. Ramsay 23 February [1860]
- To W. B. Tegetmeier 24 [February? 1860]
- To Asa Gray 24 February [1860]
- To Charles Lyell 25 February [1860]
- To J. D. Hooker 26 [February 1860]
- To J. D. Hooker [26 February or 4 March 1860]
- From Joseph Beete Jukes 27 February 1860
- From Francis Boott 29 February 1860
- To Asa Gray 2 March [1860]
- To J. D. Hooker 3 March [1860]
- To T. H. Huxley 4 March [1860]
- To a Bookseller 4 March [1860]
- To James Lamont 5 March [1860]
- To Williams and Norgate? 6 March [1860]
- To S. P. Woodward 6 March [1860]
- To Albrecht Carl Ludwig Gotthilf Günther 6 March [1860]
- To Asa Gray 8 March [1860]
- From Frederick Wollaston Hutton 8 March 1860
- To J. D. Hooker 12 March [1860]
- To Joseph Prestwich 12 March [1860]
- To J. D. Hooker 18 [March 1860]
- To G. H. K. Thwaites 21 March [1860]
- To H. G. Bronn 21 March [1860]
- To W. R. Greg 21 March [1860?]
- To W. D. Fox 22 [March 1860]
- To Octavian Blewitt 27 March [1860]
- To Charles Lyell [24 March – 3 April 1860]
- From Williams & Norgate 29 March 1860
- To Armand de Quatrefages 30 March [1860]
- DCP-LETT-2737
- DCP-LETT-2738
- To Williams and Norgate 1 April [1860]
- To G. R. Waterhouse 1 April [1860]
- To F. J. Pictet de la Rive 1 April [1860]
- To J. S. Henslow 2 April [1860]
- To Asa Gray 3 April [1860]
- From Frederick Smith 3 April 1860
- To John Murray 4 April [1860]
- To Frederick Smith 4 April [1860]
- To W. B. Carpenter 6 April [1860]
- To Albert Way 7 April [1860]
- To Maxwell Tylden Masters 7 April [1860]
- From J. S. Henslow 7 April 1860
- To T. H. Huxley 9 April [1860]
- To John Murray 9 April [1860]
- To William Marshall 9 April [1860]
- To a bookseller 9 April [1860]
- To Charles Lyell 10 April [1860]
- To H. G. Bronn 10 April [1860]
- To Williams & Norgate 10 April [1860]
- To T. H. Huxley 11 April [1860]
- To H. G. Bronn 13 April [1860]
- To J. D. Hooker 13 [April 1860]
- To M. T. Masters 13 April [1860]
- To T. H. Huxley 14 April [1860]
- To Charles Lyell 15 April [1860]
- From Thomas Stewardson 16 April 1860
- To W. B. Tegetmeier 17 April [1860]
- To J. D. Hooker 18 [April 1860]
- From J. D. Hooker [20 April 1860]
- To Oswald Heer? 20 April [1861?]
- To T. H. Huxley [after 20 April 1860]
- To Gardeners’ Chronicle [13 April 1860]
- To Asa Gray 25 April [1860]
- To ? 25 [April 1860?]
- To J. D. Hooker 26 April [1860]
- To J. D. Hooker 27 April [1860]
- To Charles Lyell 27 and 28 April [1860]
- To Andrew Murray 28 April [1860]
- To Andrew Murray 28 [April 1860]
- From J. D. Hooker [28 April 1860]
- DCP-LETT-2775
- To J. D. Hooker 30 April [1860]
- To Cottage Gardener [after 8 May 1860]
- From B. P. Brent [May–June 1860?]
- To Roderick Impey Murchison 1 May [1860]
- From Charles Lyell 2 May 1860
- From Andrew Murray 3 May 1860
- From Henry Doubleday 3 May 1860
- To Charles Lyell 4 May [1860]
- From J. S. Henslow 5 May 1860
- To Andrew Murray 5 May [1860]
- To J. D. Hooker 7 May [1860]
- To T. H. Huxley 7 May [1860]
- From Charles Lyell 7 May 1860
- To Charles Lyell 8 [May 1860]
- To Thomas Stewardson 8 May 1860
- To W. B. Tegetmeier 8 May [1860]
- To J. S. Henslow 8 May [1860]
- From William Masters 8 May 1860
- From H. C. Watson 10 May 1860
- From J. S. Henslow to J. D. Hooker 10 May 1860
- To J. D. Hooker 11 May [1860]
- From John Cattell 12 May 1860
- To Williams & Norgate 13 [May 1860]
- To H. A. Huxley [before 25 November 1866?]
- To J. D. Hooker 13 [May 1860]
- To Francis Galton 13 May [1860]
- To J. D. Hooker 14 May [1860]
- To J. S. Henslow 14 May [1860]
- To J. D. Hooker 15 [May 1860]
- To James Drummond 16 May 1860
- From Henry Doubleday 16 May 1860
- To J. S. Henslow 17 May [1860]
- To Charles Lyell 18 May [1860]
- To A. R. Wallace 18 May 1860
- To Asa Gray 18 May [1860]
- To W. D. Fox 18 May [1860]
- To John Murray 18 May [1860]
- To Williams & Norgate 18 May [1860]
- To J. D. Hooker 20 May [1860]
- To Charles Lyell 22 May [1860]
- To J. D. Hooker 22 [May 1860]
- To Asa Gray 22 May [1860]
- To John Lubbock 25 May [1860]
- To J. D. Hooker 29 [May 1860]
- To John Lubbock 29 [May 1860]
- To J. D. Hooker 30 May [1860]
- From Asa Gray [10 July 1860]
- To Charles Lyell 1 [June 1860]
- To George Rolleston 1 June [1860]
- To J. D. Hooker 5 June [1860]
- To Charles Lyell 6 June [1860]
- To George Rolleston 6 June [1860]
- To J. D. Hooker 7 June [1860]
- To John Murray 7 June [1860]
- To Asa Gray 8 June [1860]
- From J. D. Hooker 8 June 1860
- To Gardeners’ Chronicle [4–5 June 1860]
- To Emma Gärtner 9 June [1860]
- DCP-LETT-2828
- To Henry Tibbats Stainton 11 June [1860]
- To J. D. Hooker 12 [June 1860]
- To John Higgins 13 June [1860]
- To Charles Lyell 14 [June 1860]
- From Charles Lyell 15 June 1860
- To ? 14 June [1860]
- To Charles Lyell 17 June [1860]
- To W. B. Carpenter 17 June [1860]
- To T. C. Eyton 18 June [1860]
- To W. D. Fox 18 June [1860]
- From John Higgins 19 June 1860
- From Frederick Bond [16? June 1860]
- From Charles Lyell 19 June 1860
- From John Higgins 16 June 1860
- To Charles Lyell 20 [June 1860]
- To H. T. Stainton 20 June [1860]
- To John Higgins 21 June [1860]
- To John Higgins 22 June 1860
- To Alexander Goodman More 24 June [1860]
- To A. C. Ramsay [26 June 1859]
- To Charles Lyell 25 [June 1860]
- To John Obadiah Westwood 25 June [1860]
- From A. C. Ramsay [27–30 June 1859]
- To J. D. Hooker 26 [June 1860]
- From Frederick Bond 26 June 1860
- To Entomologist’s Weekly Intelligencer [20 June 1860]
- To A. G. More [30 June 1860]
- From Bernard Peirce Brent [after August 1856]
- To A. C. Ramsay 1 July [1859]
- From J. D. Hooker 2 July 1860
- To J. D. Hooker [2 July 1860]
- To T. H. Huxley 3 July [1860]
- To Asa Gray 3 July [1860]
- To J. D. Hooker [3 July 1860]
- To A. G. More 3 July [1860]
- To J. D. Hooker [4 July 1860]
- To John Lubbock [4 July 1860]
- To Charles Lyell 5 [July 1860]
- To T. H. Huxley [5 July 1860]
- To [2 July 1860]
- To J. O. Westwood 9 July [1860]
- From Hugh Falconer 9 July [1860]
- To J. D. Hooker 12 July [1860]
- To Hugh Falconer 12 July [1860]
- To Emma Gärtner 14 July [1860]
- To H. G. Bronn 14 July [1860]
- From Henry Fawcett 16 July [1861]
- To J. S. Henslow 16 July [1860]
- To Charles Giles Bridle Daubeny 16 July [1860]
- To John Innes 18 July [1860]
- To J. D. Hooker 19 [July 1860]
- To W. B. Tegetmeier 20 July [1860]
- To T. H. Huxley 20 July [1860]
- To John Lubbock 20 July [1860]
- To J. D. Hooker [20? July 1860]
- To Asa Gray 22 July [1860]
- From Charles Hardy 23 July 1860
- To J. D. Hooker [17 July 1860]
- To Charles Hardy 27 July [1860]
- To J. D. Hooker 29 July [1860]
- To Charles Lyell 30 July [1860]
- To James Dwight Dana 30 July [1860]
- To W. B. Tegetmeier 30 July [1860]
- To Frederick Watkins 30 July [1860]
- To W. E. Darwin [30 July 1860]
- To J. D. Hooker 31 [August 1860]
- To T. H. Huxley [30? July 1860]
- To C. G. B. Daubeny 1 August [1860]
- To John Murray 3 August [1860]
- To A. G. More 3 August [1860]
- To A. G. More 5 August [1860]
- From T. H. Huxley 6 August 1860
- To J. D. Hooker 7 August [1860]
- To T. H. Huxley 8 August [1860]
- To A. G. More 9 August [1860]
- To Charles Lyell 11 August [1860]
- To Asa Gray 11 August [1860]
- From Charles Théophile Gaudin [15 August 1860]
- To Robert Monsey Rolfe? 15 August [1860]
- From William Henry Harvey 24 August 1860
- To Edward Cresy 25 August [1860]
- To Charles Lyell 28 August [1860]
- From Charles Lyell 28 August 1860
- From Jeffries Wyman [c. 15] September 1860
- From Charles Lyell [before 20 November 1860]
- To Charles Lyell 1 September [1860]
- To W. B. Tegetmeier 1 September [1860]
- To J. D. Hooker 2 September [1860]
- To A. G. More 5 September [1860]
- To a bookseller 6 September [1860]
- To John Innes 6 September [1860]
- To J. D. Hooker 6 September [1860]
- From Charles Lyell 8 September 1860
- To a bookseller 9 September [1860]
- To T. H. Huxley 10 September [1860]
- To Asa Gray 10 September [1860]
- To George Gordon 11 September [1860]
- To John Innes 11 September [1860]
- To Daniel Oliver 11 September [1860]
- DCP-LETT-2914
- To Charles Lyell 12 September [1860]
- From Daniel Oliver [4–8 February 1862]
- To Daniel Oliver 15 [September 1860]
- To George Varenne Reed 15 September [1860]
- To Gardeners’ Chronicle 15 September [1860]
- From Thomas Vernon Wollaston [16 September 1860]
- To George Gordon 17 September [1860]
- From James Drummond 17 September 1860
- To T. H. Huxley 18 September [1860]
- From Charles Lyell 18 September 1860
- From H. C. Watson to George Gordon 19 September 1860
- From Daniel Oliver 19 September 1860
- From H. C. Watson to George Gordon 19 September 1860
- To W. H. Harvey [20–4 September 1860]
- To Daniel Oliver 21 [September 1860]
- To Daniel Oliver [22–3 September 1860]
- To Charles Lyell 23 [September 1860]
- To Ebenezer Norman [24 September 1860]
- From Daniel Oliver 25 September 1860
- From Charles Lyell 25 September 1860
- To Charles Lyell 26 [September 1860]
- To Daniel Oliver [10 October 1860]
- To Asa Gray 26 September [1860]
- From Charles Lyell 27 September 1860
- To Charles Lyell 28 [September 1860]
- To J. S. Henslow 28 [September 1860]
- From Charles Lyell 30 September 1860
- To Edward Cresy [19 October 1860]
- From H. G. Bronn 13 [or 15] October 1860
- To Charles Lyell 3 October [1860]
- To Jeffries Wyman 3 October [1860]
- From Charles Lyell [after 3 October 1860]
- To Charles Lyell 5 [October 1860]
- To Daniel Oliver 5 October [1860]
- To H. G. Bronn 5 October [1860]
- From Charles Lyell 6 October 1860
- To Daniel Oliver [29 September 1860]
- To Charles Lyell 8 October [1860]
- From W. H. Harvey 8 October 1860
- From James Drummond 8 October 1860
- To J. S. Henslow 11 October [1860]
- To Daniel Oliver 12 [October 1860]
- To Daniel Oliver 12 [October 1860]
- To John Murray 12 October [1860]
- From August Wilhelm von Hofmann to Edward Cresy 13 October 1860
- To Johann Nicolaus Trübner? 14 October [1860]
- To Daniel Oliver 14 October [1860]
- To Edward Cresy 14 October [1860]
- To John Medows Rodwell 15 October [1860]
- To Daniel Oliver 17 October [1860]
- To Daniel Oliver [31? October 1860]
- To W. D. Fox 18 October [1860]
- From Robert Patterson 18 October 1860
- To Asa Gray 19 October [1860]
- To Daniel Oliver 20 October [1860]
- To G. H. K. Thwaites 20 October [1860]
- To Robert Patterson 21 October [1860]
- To Daniel Oliver 23 [October 1860]
- To Daniel Oliver 24 [September 1860]
- To Asa Gray 24 October [1860]
- To John Innes 26 October [1860]
- To W. E. Darwin 26 [October 1860]
- To J. S. Henslow 26 October [1860]
- To Daniel Oliver 27 [September 1860]
- To David Thomas Ansted 27 October [1860]
- From A. W. von Hofmann to Edward Cresy 27 October 1860
- From Benjamin Silliman Jr 27 October 1860
- To William Sharpey 28 October [1860]
- From Edward Cresy 30 October 1860
- To Asa Gray 31 October [1860]
- From John Medows Rodwell 31 October 1860
- From Daniel Oliver [before 23 October 1860]
- To T. H. Huxley 1 November [1860]
- To Edward Cresy 2 November [1860]
- To Edward Cresy 2 November [1860]
- To Daniel Oliver 3 November [1860]
- To J. M. Rodwell 5 November [1860]
- To Daniel Oliver 7 November [1860]
- To W. E. Darwin [9 November 1860]
- To T. H. Huxley 10 November [1860]
- From Edward Cresy 10 November 1860
- To J. S. Henslow 10 November [1860]
- To G. V. Reed 12 November [1860]
- To John Phillips 14 November [1860]
- From Trenham Reeks 15 November 1860
- To Daniel Oliver 16 November [1860]
- To T. H. Huxley 16 November [1860]
- To Daniel Oliver [21 November 1860]
- To John Lubbock [18 November 1860]
- To John Higgins 19 November 1860
- To Charles Lyell 20 November [1860]
- To John Murray 20 November [1860]
- To J. D. Hooker 21 November [1860]
- To James Drummond 22 November [1860]
- To Henry Walter Bates 22 November [1860]
- To T. H. Huxley 22 November [1860]
- From W. H. Harvey to J. D. Hooker 23 November [1860]
- From Daniel Oliver 23 November 1860
- To Charles Lyell 24 November [1860]
- From Charles Lyell 24 November 1860
- To Charles Lyell 25 November [1860]
- To Asa Gray 26 November [1860]
- To J. D. Hooker 26 November [1860]
- From J. D. Hooker [26 November – 4 December 1860]
- To John Lubbock 28 November [1860]
- From Charles Lyell 30 November 1860
- DCP-LETT-3002
- To T. H. Huxley 2 December [1860]
- To John Murray 3 December [1860]
- To Jeffries Wyman 3 December [1860]
- To Charles Lyell 4 December [1860]
- To Benjamin Silliman Jr 4 December [1860]
- To J. D. Hooker 4 December [1860]
- To T. H. Huxley 5 [December 1860]
- To John Murray 5 December [1860]
- To J. D. Hooker 6 December [1860]
- From J. M. Rodwell 6 December 1860
- To Henry Fawcett 6 December [1860]
- From J. D. Hooker [6–11 December 1860]
- To W. E. Darwin [8 December 1860]
- From Alfred Swaine Taylor to Edward Cresy 10 December 1860
- To Richard Kippist? 11 December [1860]
- To Asa Gray 11 December [1860]
- To T. H. Huxley 11 December [1860]
- To J. D. Hooker 11 December [1860]
- To David Forbes 11 December [1860]
- To George Charles Wallich 12 December [1860]
- To Edward Cresy 12 December [1860]
- From T. H. Huxley [before 14 December 1860]
- To Asa Gray 14 December [1860]
- From G. C. Wallich 14 December [1860]
- To J. D. Hooker 17 December [1860]
- To W. D. Fox 17 December [1860]
- To James Drummond 20 December [1860]
- To Daniel Oliver 20 December [1860]
- To Asa Gray 21 December [1860]
- To John Murray 22 [November 1860]
- From Sarah Elizabeth Wedgwood 25 December [1860?]
- To J. D. Hooker 26 December [1860]
- To John Innes 28 December [1860]
- From J. D. Hooker 28 December 1860
- To J. D. Hooker 29 December [1860]
- From Gideon Lincecum 29 December 1860
- To [the Royal College of Surgeons of England] 28 December [1860]
- From J. D. Hooker [11 May – 3 December 1860]
- DCP-LETT-3037
- To John Lubbock [before 5 February 1861]
- From Daniel Oliver [before 3 November 1861]
- DCP-LETT-3040
- To Williams & Norgate [1861]
- To Thomas Henry Huxley 3 January [1861]
- From H. C. Watson to J. D. Hooker 4 January 1861
- To Gardeners’ Chronicle [before 5 January 1861]
- To S. P. Woodward 5 June [1861]
- To Richard Kippist 7 January [1861]
- From Jeffries Wyman 8 January [1861]
- To W. D. Fox 9 January [1861]
- From Charles and Emma Darwin to W. E. Darwin [13 January 1861]
- To J. D. Hooker 15 January [1861]
- To John Murray 21 January [1861]
- To William Walmisley Baxter? 22 January 1861
- To Asa Gray 23 [January 1861]
- To William Erasmus Darwin [24 January 1861]
- From William Duppa Crotch 25 January 1861
- To ? [1860–82?]
- From Francis Walker 1 February 1861
- To Charles Lyell 2 February [1861]
- To William Bernhard Tegetmeier 3 February [1861]
- To Jeffries Wyman 3 February [1861]
- To J. D. Hooker 4 February [1861]
- From William A. Wooler 4 February 1861
- To Francis Galton 4 February [1856]
- To J. D. Hooker 8 [February 1861]
- To Gardeners’ Chronicle [before 9 February 1861]
- To Richard Kippist 13 February [1861?]
- To Thomas Salt 9 February [1861]
- To Leonard Horner 14 February [1861]
- To Williams & Norgate 16 February [1861]
- To T. H. Huxley 17 February [1861]
- To Thomas Salt 17 February [1861]
- To Asa Gray 17 February [1861]
- To J. D. Hooker 20 [February 1861]
- To T. H. Huxley 22 February [1861]
- To John Tyndall 23 February [1861]
- To Andrew Murray 23 February [1861]
- To John Murray 24 February [1861]
- To W. B. Tegetmeier 25 February [1861]
- To James Lamont 25 February [1861]
- To Daniel Oliver 26 February [1861]
- To Asa Gray 26–7 February [1861]
- To Archibald Geikie 27 February [1861]
- From John Innes [before 6 April 1861]
- To W. B. Tegetmeier 1 March [1861]
- To George Rolleston 2 March [1861]
- From Andrew Murray 3 March 1861
- To John Murray 3 March [1861]
- To Andrew Murray 3 March [1861]
- To Philip Lutley Sclater 4 March [1861]
- To Joseph Leidy 4 March [1861]
- From Gideon Lincecum 4 March 1861
- To Williams & Norgate 4 March [1861]
- To George Rolleston 7 March [1861]
- To Alexander Goodman More 8 March [1861]
- To J. D. Hooker 11 March [1861]
- To P. L. Sclater 12 [March 1861]
- To Asa Gray 12 March [1861]
- To Cuthbert Collingwood 14 March [1861]
- From George Maw 15 March 1861
- To George Maw 17 March [1861]
- To J. D. Hooker 18 March [1861]
- From Henry Walter Bates 18 March 1861
- To T. H. Huxley 20 March [1860]
- To Leonard Horner 20 March [1861]
- To W. B. Tegetmeier 22 March [1861]
- To P. L. Sclater 23 March [1861]
- To Daniel Oliver 23 March [1861]
- To J. D. Hooker 23 [April 1861]
- To William Samuel Symonds 26 March [1861]
- To H. W. Bates 26 March [1861]
- To J. D. Hooker 26 [March 1861]
- To J. D. Hooker 27 [March 1861]
- To W. B. Tegetmeier 28 March [1861]
- To W. B. Tegetmeier [28 March – 14 April 1861]
- From H. W. Bates 28 March 1861
- DCP-LETT-3105
- To Daniel Oliver 1 April [1861]
- To T. H. Huxley 1 April [1861]
- To B. P. Brent 1 April [1861]
- To W. B. Tegetmeier 2 April [1861]
- To H. W. Bates 4 April [1861]
- To Daniel Oliver 4 April [1861]
- To J. D. Hooker 4 April [1861]
- To George Busk 5 April [1861]
- From John D. Glennie Jr 6 April 1861
- To Samuel Birch 6 April [1861]
- To John Crawfurd 7 April 1861
- To Asa Gray 11 April [1861]
- To J. D. Hooker 11 April [1861]
- To Charles Lyell 12 April [1861]
- To [Robert Chambers?] 13 April [1861]
- To W. B. Tegetmeier 14 April [1861]
- To J. D. Hooker 14 [April 1861]
- From George Rolleston 16 April 1861
- From P. L. Sclater 17 April 1861
- To Frederick Wollaston Hutton 20 April 1861
- To P. L. Sclater 21 [April 1861]
- To W. E. Darwin 21 and 22 April [1861?]
- To Samuel Birch 21 April [1861]
- To J. D. Hooker 23 [April 1861]
- To Daniel Oliver 23 April [1861]
- To Herbert Spencer 23 [February 1860]
- To Armand de Quatrefages 25 April [1861]
- To Thomas Davidson 26 April 1861
- To the Field [before 27 April 1861]
- To John Murray 30 April [1861]
- To Robert Chambers 30 April [1861]
- To Thomas Davidson 30 April 1861
- From Charles Lyell 4 October 1859
- To Daniel Oliver 1 May [1861]
- To T. C. Eyton 3 May [1861]
- From Thomas Davidson 3 May 1861
- To John Murray 3 May [1861]
- To Luke Hindmarsh 3 May [1861]
- To the Field [before 4 May 1861]
- To P. L. Sclater 4 May [1861]
- From W. B. Tegetmeier 4 May [1861]
- To T. C. Eyton 6 May [1861]
- To ? 7 May [1861–8?]
- From John Murray 7 May 1861
- From William Hardy to Luke Hindmarsh [8 May 1861]
- To John Murray 8 May [1861]
- From W. E. Darwin 8 May [1866]
- To W. E. Darwin 9 May [1861]
- To Luke Hindmarsh 12 May [1861]
- To Journal of Horticulture [before 14 May 1861]
- To T. C. Eyton 14 May [1861]
- To J. D. Hooker 14 May [1861]
- From Robert Edmond Grant 16 May 1861
- To J. S. Henslow [September 1831 – May 1861]
- To Charles William Crocker 18 May [1861]
- To J. D. Hooker 18 [May 1861]
- To John Higgins 20 May 1861
- To T. H. Huxley 22 May [1861]
- To J. F. W. Herschel 23 May [1861]
- To J. D. Hooker 24–5 May [1861]
- To Bartholomew James Sulivan 24 May [1861]
- To the Field [before 25 May 1861]
- To W. E. Darwin [25 May 1861]
- To John Lubbock [25 May 1861]
- To Abraham Dee Bartlett 26 May [1861]
- To W. E. Darwin [26 May 1861]
- To Daniel Oliver 27 May [1861]
- To Journal of Horticulture [17 May 1861]
- To James Hunt 28 May [1861]
- To W. B. Tegetmeier 28 May [1861]
- To Edward Cresy 28 May [1861]
- From W. B. Tegetmeier [28 May 1861]
- From Bernard Peirce Brent 29 May 1861
- To J. D. Hooker 30 May [1861]
- From Emma Darwin [June 1861]
- To C. W. Crocker 1 June [1861]
- To W. E. Darwin 1 [June 1861]
- To John Lubbock 1 June [1861]
- To P. L. Sclater 2 June [1861]
- To A. G. More 2 June [1861]
- To Charles Kingsley 2 June [1865]
- To A. G. More 4 June [1861]
- To Asa Gray 5 June [1861]
- To John Lubbock 6 June [1861]
- To W. E. Darwin 6 [June 1861]
- To John Lubbock [8 June 1861]
- To ? 11 June [1861–8]
- From Thomas Francis Jamieson 13 June 1861
- To Edward Walford 13 June [1861]
- To Gardeners’ Chronicle [before 15 June 1861]
- To the Field [before 15 June 1861]
- To Bingham Sibthorpe Malden 15–16 June [1861]
- From B. P. Brent 15 June 1861
- To George Gordon 17 June [1861]
- To George Bentham 17 June [1861]
- To A. G. More 17 June [1861]
- To Journal of Horticulture [before 18 June 1861]
- To Frederick Smith 19 June [1861]
- To J. D. Hooker 19 June [1861]
- To George Gordon 22 June [1861]
- To J. D. Hooker 22 June [1861]
- To George Bentham 22 June [1861]
- From Hugh Falconer 23 June 1861
- To Henry Bence Jones 23 June [1861]
- To John Lubbock 24 June [1861]
- To Hugh Falconer 24 [June 1861]
- From Robert Colgate 25 June 1861
- From H. C. Watson to George Gordon 27 June 1861
- To George Dickie [5 July 1861]
- From George Gordon to John Hutton Balfour 1 July 1861
- To George Gordon 4 July [1861]
- To J. D. Hooker [6 July 1861]
- To George Gordon 6 July [1861]
- From Tiberius Cornelis Winkler 7 July 1861
- To A. G. More 7 July [1861]
- To W. D. Fox 8 July [1861]
- To Journal of Horticulture [before 9 July 1861]
- To John Lubbock 10 July [1861]
- To Frances Julia Wedgwood 11 July [1861]
- To J. D. Hooker 13 July [1861]
- To George Maw 13 July [1861]
- To John Lubbock 14 July [1861]
- To J. D. Hooker 17 [July 1861]
- To A. G. More 17 [July 1861]
- DCP-LETT-3211A
- To Peter Martin Duncan? 18 July [1861]
- To A. G. More 19 July [1861]
- To George Maw 19 July [1861]
- To Charles Lyell 20 July [1861]
- To Henry Fawcett 20 July 1861
- To Asa Gray 21 July [1861]
- To John Tyndall 24 July [1861]
- From H. C. Watson 24 July 1861
- To John Lubbock 26 July [1861]
- To J. D. Hooker 27 July [1861]
- To J. D. Hooker [28 July – 10 August 1861]
- From William Branwhite Clarke [August 1861]
- To Charles Lyell [1 August 1861]
- To John Lubbock 1 [and 2] August [1861]
- To John Lubbock [2 August 1861]
- To J. D. Hooker [11 August 1861]
- From the University of Breslau 4 August 1861
- To Charles Lyell 6 August [1861]
- To John Lubbock 9 August [1861]
- DCP-LETT-3228A
- To John Lubbock 10 August [1861]
- To Charles Lyell 13 [August 1861]
- To J. D. Hooker 13 [August 1861]
- To A. G. More 13 [August 1861]
- To John Lubbock 14 August [1861]
- To John Obadiah Westwood 15 August [1861]
- To Charles Lyell 21 August [1861]
- To Williams & Norgate 25 August [1861]
- From George Maw 27 August [1861]
- To W. B. Tegetmeier 29 August [1861]
- To Neil Arnott 29 August [1861]
- To J. D. Hooker 30 August [1861]
- To George Maw 31 August [1861]
- From H. W. Bates [before 25 September 1861]
- From George Rolleston 1 September 1861
- From Asa Gray [27 and 29 August] and 2 September [1861]
- From T. F. Jamieson 3 September 1861
- To J. O. Westwood 4 September [1861]
- To Charles Hardy? 4 September [1861]
- To George Rolleston 5 September [1861]
- To Charles Lyell 6 September [1861]
- To T. F. Jamieson 6 September [1861]
- To J. D. Hooker 6 September [1861]
- To Journal of Horticulture [before 10 September 1861]
- To Charles Lyell 10 September [1861]
- To John Murray 10 September [1861]
- To Daniel Oliver 11 September [1861]
- To Gardeners’ Chronicle [before 14 September 1861]
- To Gardeners’ Chronicle [before 14 September 1861]
- To Charles Lyell [15 September 1861]
- To Asa Gray 16 September [1861]
- To Asa Gray 17 September [1861]
- To Henry Fawcett 18 September [1861]
- From H. C. Watson 20 September 1861
- To John Murray 21 September [1861]
- To Charles Lyell 22 September [1861]
- From John Murray 23 September 1861
- To A. G. More 23 September [1861]
- To J. D. Hooker 24 September [1861]
- To John Murray 24 September [1861]
- To Joseph Reay Greene? 24 September [1861]
- To H. W. Bates 25 September [1861]
- From J. O. Westwood 26 September 1861
- To J. D. Hooker 28 September [1861]
- From J. D. Hooker [28 September 1861]
- From Charles Lyell 30 September 1861
- From H. W. Bates 30 September 1861
- To Charles Lyell 1 October [1861]
- To A. G. More 1 October [1861]
- To H. W. Bates 2 October 1861
- To John Murray 3 October [1861]
- To J. D. Hooker 4 October [1861]
- To John Murray 5 October [1861]
- To J. D. Hooker 6–7 October [1861]
- To John Gould 6 October [1861]
- To Daniel Oliver 8 October [1861]
- From Daniel Oliver [after 8 October 1861]
- From Thomas White Woodbury [9–22 October 1861]
- To J. D. Hooker 11 October [1861]
- From Asa Gray 11 October 1861
- To Asa Gray [after 11 October 1861]
- To W. E. Darwin 12 October [1861]
- To J. D. Hooker 13 October [1861]
- To John Rogers 14 October [1861]
- To J. D. Hooker 15 [October 1861]
- To W. E. Darwin 17 [October 1861]
- To J. D. Hooker 18 October [1861]
- To John Lindley 18 October [1861]
- To J. D. Hooker 19 [June 1860]
- To Charles Lyell 20 October [1861]
- To John Murray 21 October [1861]
- From Henry Wenman Newman [before 22 October 1861]
- To T. H. Huxley 22 October [1861]
- To W. E. Darwin 22 October [1861]
- From Charles Lyell 22 October 1861
- To Charles Lyell 23 [October 1861]
- To J. D. Hooker 23 October [1861]
- From T. F. Jamieson 24 October 1861
- To W. B. Clarke 25 October [1861]
- To John Lindley 25 October [1861]
- To Lionel Smith Beale 26 October [1861]
- To J. D. Hooker 27 October [1861]
- To W. E. Darwin [27 October 1861]
- To T. H. Huxley 31 October [1861]
- To J. D. Hooker 1 November [1861]
- To J. D. Hooker 1 November [1861]
- To John Lindley 1 November [1861]
- To W. E. Darwin 4 November [1861]
- To J. D. Hooker 5 [November 1861]
- To J. D. Hooker 6 [November 1861]
- To J. D. Hooker 7 November [1861]
- To J. D. Hooker 8 November [1861]
- From Daniel Oliver 8 November 1861
- From Asa Gray 9 November 1861
- To George Bentham 9 November [1861]
- To J. D. Hooker 10 November [1861]
- To Dorothy Fanny Nevill 12 November [1861]
- To George Robert Waterhouse 12 November [1861]
- To J. D. Hooker 14 November [1861]
- To J.-B. P. Guépin 14 November 1861
- To W. E. Darwin 15 November [1861]
- From W. E. Darwin [17 November 1861]
- To John Lindley 16 November [1861]
- To J. D. Hooker 17 November [1861]
- To John Lindley 17 November [1861]
- To D. F. Nevill 19 November [1861]
- To J. D. Hooker 20 [November 1861]
- To J. D. Hooker [22 November 1861]
- From William Hugh Gower 23 November 1861
- To George Bentham 24 November [1861]
- To J. D. Hooker 25 November [1861]
- To George Bentham 26 November [1861]
- From George Bentham 26 November 1861
- From George Bentham 29 November 1861
- To Daniel Oliver 30 November [1861]
- From Alfred Russel Wallace 30 November 1861
- To George Bentham 30 November [1861]
- From H. W. Bates [1 December] 1861
- To J. D. Hooker 1 December [1861]
- To H. W. Bates 3 December [1861]
- To John Higgins 3 December 1861
- To Ludwig Rütimeyer 5 December [1861]
- To Daniel Oliver 7 December [1861]
- To J. D. Hooker [9 December 1861]
- To Asa Gray 11 December [1861]
- To John Innes 15 December [1861]
- To John Lindley 15 December [1861]
- To H. W. Bates 15 December [1861]
- To J. D. Hooker 18 [December 1861]
- To John Innes 19 December [1861]
- From B. O’Neile Wilson 22 December 1861
- From John Innes [24 December 1861]
- To John Lindley 24 December [1861]
- To J. D. Hooker 27 [December 1861]
- To J. D. Hooker 28 [December 1861]
- To John Lindley 28 December [1861]
- From Asa Gray 31 December 1861
- From Leonard Jenyns 31 December 1861
- From James Bateman [1 February 1862]
- From Robert Bateman [28 January 1862]
- To John St Barbe [before 3 July 1862]
- From the principal inhabitants of Down to the secretary of the Post Office [1845–51?]
- To John St Barbe [16 July 1862]
- To James Brown Gibson [after 29 June 1862]
- From Andrew Smith [November? 1862]
- From W. E. Darwin [2 November 1862]
- From H. G. Bronn [before 11 March 1862]
- From T. C. Eyton [after 19 May 1862?]
- To Frederick Smith [c. 17 February 1864?]
- From Emma and Charles Darwin to W. E. Darwin [20 May 1864]
- To W. E. Darwin 29 [June 1863?]
- From Ellen Frances Lubbock to Emma Darwin [January 1862]
- DCP-LETT-3369
- From John Brodie Innes 2 January [1862]
- To J. B. Innes [3] January [1862]
- To Charles Edouard Brown-Séquard 2 January [1862]
- From J. D. Hooker [1 January 1862]
- From J. D. Hooker [29 December 1861]
- From J. D. Hooker [30 December 1861 or 6 January 1862]
- From John Lubbock 6 January 1862
- From Henry Walter Bates 6 January 1862
- From John Lubbock 7 [February] 1862
- From Société Impériale Zoologique d’Acclimatation 10 January 1862
- To Société Impériale Zoologique d’Acclimatation [after 10 January 1862]
- From H. W. Bates 11 January 1862
- To H. W. Bates 13 January [1862]
- From Thomas Henry Huxley 13 January 1862
- From Charles Carter Blake 13 January 1862
- From C. E. Brown-Séquard 13 January 1862
- To T. H. Huxley 14 [January 1862]
- From John Hutton Balfour 14 January 1862
- From Henry Holland [3–14] January [1862]
- To Ludwig Rütimeyer 15 [and 16] January [1862]
- From Henry Holland 15 January [1862]
- To J. D. Hooker 16 January [1862]
- From William Branwhite Clarke 16 January 1862
- From Charles Cardale Babington 17 January 1862
- From J. D. Hooker [25 January 1862]
- From J. D. Hooker [19 January 1862]
- From T. H. Huxley 20 January 1862
- To C. C. Babington 20 January [1862]
- From Conrad Martens 20 January 1862
- From Erasmus Alvey Darwin 21 [January 1863]
- From Henry Holland [21 January 1862?]
- From W. B. Clarke 21 January 1862
- From Dorothy Frances Nevill [before 22 January 1862]
- To T. H. Huxley 22 January [1862]
- To Asa Gray 22 January [1862]
- To D. F. Nevill 22 January [1862]
- From Leonard Jenyns 22 January [1862]
- From John Rogers 22 January 1862
- From D. F. Nevill [before 22 January 1862]
- To John Lubbock 23 January [1862]
- To Leonard Jenyns 24 January [1862]
- To J. D. Hooker 25 [and 26] January [1862]
- From H. W. Bates 25 January 1862
- To John Lubbock 25 January [1857]
- From John Lubbock 27 January 1862
- To D. F. Nevill 27 November [1861]
- To John Murray 28 January [1862]
- From John Edward Gray 28 January 1862
- From John Lubbock 29 January 1862
- From Francis Boott 27 January 1862
- From J. E. Gray 29 January 1862
- From John Murray 30 January [1862]
- To J. D. Hooker 30 January [1862]
- From C. C. Babington 30 January 1862
- From Henry Holland 30 January [1862]
- To H. W. Bates 31 January [1862]
- To Henry Holland 31 January [1862]
- To Charles William Crocker 31 January [1864]
- From Charles Kingsley 31 January 1862
- To Richard Kippist 31 January [1869?]
- DCP-LETT-3427
- To J. D. Hooker [before 15 February 1862]
- From J. D. Hooker [before 15 February 1862]
- From J. D. Hooker [31 January – 8 February 1862]
- From D. F. Nevill [c. 14 March 1862]
- To C. C. Babington 1 February [1862]
- From J. E. Gray 1 February 1862
- From J. D. Hooker [8 February 1862]
- From Henry Holland [1 or 8 February 1862]
- To T. H. Huxley 2 February [1862]
- To George Bentham 3 February [1862]
- To T. H. Huxley 6 February [1862]
- To Charles Kingsley 6 February [1862]
- To J. D. Hooker 9 February [1862]
- From Charles Augustus Bennet, Lord Tankerville [9 February 1862]
- To John Murray 9 [February 1862]
- From Maurice Alberts 10 February 1862
- To Ludwig Rütimeyer 11 February [1862]
- From W. E. Darwin 12 February [1862]
- From John Lubbock 13 February 1862
- From Maurice Alberts 13 February 1862
- To Maurice Alberts [after 13 February 1862]
- To William Erasmus Darwin 14 February [1862]
- To Asa Gray 16 February [1862]
- From Charles William Crocker 17 February 1862
- From Andrew Crombie Ramsay 17 February 1862
- From Asa Gray 18 February 1862
- From Searles Valentine Wood 18 February 1862
- To A. C. Ramsay 18 February [1862]
- From J. B. Innes 19 February [1862]
- From J. D. Hooker [26 February 1862?]
- From J. E. Gray 21 February 1862
- To J. B. Innes 24 February [1862]
- To J. D. Hooker 25 February [1862]
- To Maxwell Tylden Masters 26 February [1862]
- To H. W. Bates 27 [February 1862]
- From J. D. Hooker 27 February 1862
- To H. W. Bates 27 February [1862]
- From Charles Lyell [28–31 March 1862]
- From C. W. Crocker [before 13 March 1862]
- From J. D. Hooker 3 March 1862
- From George E. Harris 3 March 1862
- DCP-LETT-3466A
- To G. E. Harris 5 March [1862]
- From Asa Gray 6 March [1862]
- To J. D. Hooker 7 March [1862]
- From J. D. Hooker [10 March 1862]
- To H. G. Bronn 11 March [1862]
- From C. W. Crocker 13 March 1862
- To J. D. Hooker 14 March [1862]
- To Asa Gray 15 March [1862]
- From J. D. Hooker 17 March 1862
- From M. T. Masters 17 March 1862
- To Richard Kippist 18 March [1862]
- To Richard Kippist 18 March [1862]
- To William Bernhard Tegetmeier 18 March [1862]
- To J. D. Hooker 18 March [1862]
- From J. D. Hooker [23 March 1862]
- To J. D. Hooker 22 [March 1862]
- DCP-LETT-3482
- From J. D. Hooker [23–5 March 1862]
- From Thomas Francis Jamieson 24 March 1862
- To J. D. Hooker 26 [March 1862]
- From Henry Holland 26 March [1862]
- From J. D. Hooker [after 26 March 1862?]
- From H. G. Bronn 27 March 1862
- DCP-LETT-3487F
- To T. F. Jamieson 27 March [1862]
- To George Bentham 30 March [1862]
- From Asa Gray 31 March [1862]
- From Henry Holland [c. April 1862]
- To Charles Lyell 1 April [1862]
- To Octavian Blewitt 2 April [1862]
- From George Busk 1 April 1862
- From John Murray 1 April 1865
- To John Murray 4 April [1865]
- From J. D. Hooker [7 April 1862]
- From Alfred Russel Wallace 7 April 1862
- From Edward Newman 6 April 1862
- From Edmund Alexander Parkes 8 April 1862
- To Daniel Oliver 9 April [1861]
- To J. D. Hooker 9 [April 1862]
- To John Murray 9 April [1862]
- From Daniel Oliver 10 April 1862
- To Andrew Murray 10 April [1862]
- To Daniel Oliver 12 [April 1862]
- From Andrew Murray 12 April 1862
- From J. D. Hooker [15 April 1862]
- To H. W. Bates 16 April [1862]
- To C. E. Brown-Séquard 16 April [1862]
- To Hugh Falconer 16 April [1856]
- From John Lubbock 17 April 1862
- From H. W. Bates [17 April 1862]
- To Daniel Oliver 20 [April 1862]
- To Asa Gray 21 April [1862]
- From C. W. Crocker 22 April 1862
- From Daniel Oliver 23 April 1862
- To Daniel Oliver 24 April [1862]
- From Thomas Gold Appleton 24 April [1862]
- From Berthold Carl Seemann 24 April 1862
- To H. G. Bronn 25 April [1862]
- To W. E. Darwin 26 April [1862]
- From E. A. Parkes 28 April 1862
- To T. H. Huxley 30 April [1862]
- From H. W. Bates 30 April 1862
- From Armand de Quatrefages [after 11 July 1862]
- To W. E. Darwin [8 May 1862]
- From G. C. Oxenden [before 30 May 1862]
- From J. D. Hooker [17 May 1862]
- To J. B. Innes 1 May [1862]
- To J. D. Hooker 1 May [1862]
- From J. D. Hooker [16 May 1862]
- To John Murray 2 May [1862]
- To H. W. Bates 4 May [1862]
- From J. B. Innes to Thomas Sellwood Stephens [before 5 May 1862]
- From J. B. Innes 5 May [1862]
- From T. H. Huxley 6 May 1862
- DCP-LETT-3536
- From J. D. Hooker [5 May 1862]
- From Hugh Falconer 7 May [1862]
- To Hugh Falconer [8 May 1862]
- To H. W. Bates 9 May [1862]
- To J. D. Hooker 9 May [1862]
- To T. H. Huxley 10 May [1862]
- To Philip Lutley Sclater 12 May [1862]
- To W. D. Fox 12 May [1862]
- To P. L. Sclater 14 May [1862]
- From Daniel Oliver 14 May 1862
- From John Obadiah Westwood 14 May 1862
- To J. D. Hooker 15 [May 1862]
- From John Lubbock 15 May 1862
- From George Henry Kendrick Thwaites 15 May 1862
- From M. T. Masters [c. 15 May 1862]
- From D. F. Nevill [16? May 1862]
- From George Chichester Oxenden 15 May 1862
- From George Bentham 15 May 1862
- To W. D. Fox [17 May 1862]
- From Georgina Tollet 17 May [1862]
- From C. W. Crocker 17 May 1862
- To J. D. Hooker [18 May 1862]
- From Asa Gray 18 May 1862
- To Alexander Goodman More 18 May [1862]
- From H. G. Bronn 19 May 1862
- From Henry Holland 19 May [1862]
- From Edward Cresy 19 May 1862
- From H. W. Bates 19 May 1862
- DCP-LETT-3565
- From C. C. Babington 22 May 1862
- From J. D. Hooker 23 May 1862
- From A. R. Wallace 23 May 1862
- To Leonard Jenyns 24 May [1862]
- To A. R. Wallace 24 [May 1862]
- From Joseph Beete Jukes 25 May 1862
- From G. C. Oxenden 26 May 1862
- From Leonard Jenyns 28 May 1862
- From J. D. Hooker [29 May 1862]
- To J. D. Hooker 30 May [1862]
- To J. D. Hooker [30 and 31 December 1861]
- From G. C. Oxenden 30 May [1862]
- From George Dickie 30 May 1862
- From J. B. Jukes 30 May 1862
- To W. E. Darwin [31 May 1862]
- From G. C. Oxenden 31 May [1862]
- To John Higgins 1 June 1862
- DCP-LETT-3582
- To Daniel Oliver [before 11 June 1862]
- From G. C. Oxenden [before 21 June 1862]
- From W. E. Darwin June 1862
- To J. D. Hooker [after 10 June 1863]
- From W. E. Darwin [1 August 1862]
- From Down Friendly Society to Bromley Savings Bank [before 14 July 1862]
- To Daniel Oliver 1 June [1867]
- From Asa Gray [2 June 1862]
- From G. C. Oxenden 4 June [1862]
- From E. Schweizerbart’sche Verlagsbuchhandlung 7 June 1862
- To A. G. More 7 June [1862]
- To Daniel Oliver 8 June [1862]
- From J. D. Hooker 9 June 1862
- To Journal of Horticulture [before 10 June 1862]
- To Asa Gray 10–20 June [1862]
- To H. W. Bates 11 June [1862]
- To J. D. Hooker 11 June [1862]
- From Frederick Currey 12 June 1862
- From George Howard Darwin [12 June 1862]
- To Leonard Horner 13 June [1862]
- To Patrick Matthew 13 June [1862]
- To W. E. Darwin 13 [June 1862]
- To John Murray 13 June [1862]
- From Alphonse de Candolle 13 June 1862
- From John Higgins 13 June 1862
- From H. W. Bates 14 June 1862
- From W. E. Darwin 14 June [1862]
- From Albert Charles Lewis Gotthilf Günther to S. P. Woodward 14 June 1861
- To G. H. K. Thwaites 15 June [1862]
- From Charles Pritchard 17 June [1862]
- To Alphonse de Candolle 17 June [1862]
- To John Murray 18 [June 1862]
- To Bienen Zeitung 18 June 1862
- From J. D. Hooker 19 [June 1862]
- To W. B. Tegetmeier 20 June 1862
- To G. H. K. Thwaites 20 June [1862]
- From E. A. Darwin 20 June [1862]
- To John Murray 20 [June 1862]
- From W. B. Clarke 20 June 1862
- To E. A. Darwin 21 June [1862]
- From G. C. Oxenden 21 June 1862
- From H. G. Bronn 21 June 1862
- To J. D. Hooker 23 June [1862]
- To Nicholas Trübner 23 June [1862]
- To William Pamplin 23 June [1862]
- From C. V. Naudin 26 June 1862
- From Frederick Smith 27 June [1862]
- From August Wilhelm von Hofmann 27 June 1862
- From J. D. Hooker 28 June 1862
- From Frederick Smith 28 June 1862
- From Emma Darwin to T. G. Appleton 28 June [1862]
- From E. A. Parkes 29 June 1862
- To J. D. Hooker 30 [June 1862]
- From George Maw 30 June 1862
- To H. G. Bronn 30 June [1862]
- From Asa Gray [late June 1862]
- To W. E. Darwin [24 July 1862]
- From Henrietta Emma Darwin to W. E. Darwin [16 March 1864]
- To W. A. Leighton 4 December [1862]
- To Asa Gray 1 July [1862]
- From E. A. Darwin 1 July [1862]
- From John Murray [1 July – 23 August 1862]
- From J. D. Hooker 2 July 1862
- From Asa Gray 2–3 July 1862
- From E. A. Darwin 2 July [1862]
- From Frederick Currey 3 July 1862
- To George Maw 3 July [1862]
- To Armand de Quatrefages 3 July [1862]
- To W. E. Darwin 4 [July 1862]
- From William Alexander Wooler 5 July 1862
- From Charles Giles Bridle Daubeny 5 July 1862
- From George Maw 7 July 1862
- From W. E. Darwin 8 July [1862]
- To M. T. Masters 8 July [1862]
- To H. C. Watson 8 [August 1862]
- From G. C. Oxenden 8 July 1862
- From G. C. Oxenden 8 July [1862]
- To W. E. Darwin 9 July [1862]
- To W. E. Darwin [after 14 July 1862]
- From J. D. Hooker 10 July 1862
- To H. G. Bronn 11 July 1862
- To Armand de Quatrefages 11 July [1862]
- From E. Schweizerbart’sche Verlagsbuchhandlung 11 July 1862
- From M. T. Masters 12 July 1862
- To Asa Gray 14 July [1862]
- From W. E. Darwin 14 July 1862
- From Friedrich Hermann Gustav Hildebrand 14 July 1862
- To Journal of Horticulture [before 15 July 1862]
- From Asa Gray 15 July [1862]
- From Bernard Peirce Brent 15 July 1862
- DCP-LETT-3660A
- To Friedrich Hildebrand 17 July [1862]
- From Asa Gray 21 July 1862
- To Journal of Horticulture [before 22 July 1862]
- DCP-LETT-3661F
- To Asa Gray 23[–4] July [1862]
- To M. T. Masters 24 July [1862]
- To Daniel Oliver 24 July [1862]
- From J. D. Hooker [24 July 1862]
- To J. D. Hooker 26 July [1862]
- To Asa Gray 28 July [1862]
- From Daniel Oliver 28 July 1862
- From Philip Henry Stanhope 28 July 1862
- DCP-LETT-3669A
- From Asa Gray 29 July 1862
- To J. O. Westwood 30 July 1862
- From G. H. Darwin [after 5 August 1862]
- DCP-LETT-3672
- To W. E. Darwin [2–3 September 1862]
- From M. S. Wedgwood [6 August 1862]
- From W. E. Darwin to Emma Darwin 8 August [1862]
- From W. E. Darwin [9? September 1862]
- From W. E. Darwin 1 August 1862
- From J. O. Westwood 1 August 1862
- From W. E. Darwin 2 August [1862]
- To W. E. Darwin [2–3 August 1862]
- From Asa Gray 4 August 1862
- From G. C. Oxenden 4 August [1862?]
- From Margaret Susan Wedgwood [before 4 August 1862]
- To W. E. Darwin 4 [November 1862]
- From W. E. Darwin 5 August 1862
- From A. R. Wallace 8 August 1862
- To Asa Gray 9 August [1862]
- From Thomas White Woodbury 9 August 1862
- To W. B. Tegetmeier 12 August [1862]
- From Asa Gray 18–19 August 1862
- To A. R. Wallace 20 August [1862]
- From J. D. Hooker 20 August 1862
- From Charles Lyell 20 August 1862
- To Asa Gray 21 August [1862]
- To John Lubbock 21 August [1862]
- To ? 21 August [1862]
- From A. R. Wallace [after 20 August 1862]
- To Charles Lyell 22 August [1862]
- To J. D. Hooker 22 [August 1862]
- From J. D. Hooker [26–31 August 1862]
- From John Lubbock 23 August 1862
- To John Murray 24 August [1862]
- To Camilla Ludwig 26 August [1862]
- From A. C. Ramsay 26 August 1862
- To Daniel Oliver 29 [July 1862]
- DCP-LETT-3703
- To W. E. Darwin [10? September 1862]
- To John Lubbock [3 September 1862]
- To Daniel Oliver 2 September [1862]
- To C. C. Babington 2 September [1862]
- To John Lubbock 2 September [1862]
- To Daniel Oliver [17 September 1862]
- To Asa Gray [3–]4 September [1862]
- From Daniel Oliver 4 September 1862
- From Asa Gray 5 September 1862
- To John Lubbock 5 September [1862]
- To A. C. Ramsay 5 September [1862]
- From Edouard Claparède 6 September 1862
- From G. C. Oxenden 11 September 1862
- To W. D. Fox 12 September [1862]
- From Daniel Oliver 13 September 1862
- From Edward Cresy 13 September 1862
- To Daniel Oliver 14 September [1862]
- To J. D. Hooker 11 September [1862]
- From Daniel Oliver 14 April 1862
- To John Lindley 14 September [1862]
- To Edward Cresy 15 September [1862]
- From J. D. Hooker 16 September 1862
- From C. C. Babington 16 September 1862
- From P. G. King 16 September 1862
- From G. C. Oxenden 17 September [1862]
- To J. D. Hooker [18 September 1862]
- From Alphonse de Candolle 18 September 1862
- From J. D. Hooker 20 September 1862
- To W. D. Fox 20 [September 1862]
- From W. B. Clarke 20 September 1862
- From Emile M. J. M. P. Goubert 20 September 1862
- To J. D. Hooker 21 [September 1862]
- From Asa Gray 22 September 1862
- From Hugh Falconer 24–7 September [1862]
- To J. D. Hooker 26 September [1862]
- To A. G. More 26 September [1862]
- From G. C. Oxenden 27 September [1862]
- From Bartholomew James Sulivan 27 September [1862]
- From A. R. Wallace 30 September 1862
- From Henry Johnson 30 September 1862
- DCP-LETT-3744
- From Erasmus Alvey Darwin [April – May? 1862]
- To Hugh Falconer 1 October [1862]
- To Charles Lyell 1 October [1862]
- To A. G. More 1 October [1862]
- From B. J. Sulivan 2 October [1862]
- From Hugh Falconer 3 October 1862
- From Hugh Falconer 4 October 1862
- To Hugh Falconer 4 October [1862]
- From Asa Gray 4 and 13 October 1862
- To J. D. Hooker 6 October [1862]
- To John Murray 7 October [1862?]
- From Henry Johnson 8 October 1862
- From W. E. Darwin 9 October 1862
- From T. H. Huxley 9 October 1862
- From T. H. Huxley 10 October [1862]
- From W. E. Darwin 11 October [1862]
- From J. D. Hooker [12 October 1862]
- From T. F. Jamieson to Charles Lyell 17 October 1862
- To Daniel Oliver 13 October [1862]
- From B. J. Sulivan 13 October [1862]
- To George Bentham 13 October [1862]
- To Charles Lyell 14 October [1862]
- To J. D. Hooker 14 [October 1862]
- From B. J. Sulivan 14 October [1862]
- To H. W. Bates 15 October [1862]
- From George Bentham 15 October 1862
- To Asa Gray 16 October [1862]
- From C. C. Babington 16 October 1862
- From E. Schweizerbart’sche Verlagsbuchhandlung 16 October 1862
- To Walter White 17 [October – November 1862?]
- To Friedrich Rolle 17 October [1862]
- From H. W. Bates 17 October 1862
- To [Friedrich Emil Suchsland] [after 19 January 1863]
- To H. W. Bates 18 October [1862]
- From J. D. Hooker [18 October 1862]
- From B. J. Sulivan 18 October [1862]
- To Daniel Oliver 20 [January 1863]
- From W. E. Darwin 21 October [1862]
- From W. E. Darwin 23 October [1862]
- To the Journal of Horticulture [before 22 October 1861]
- To John Lubbock 23 October [1862]
- From J. D. Hooker 25 October 1862
- From John Lubbock 25 October 1862
- To W. E. Darwin [25 October 1862]
- To John Lubbock 27 [October 1862]
- To J. D. Hooker 27 [October 1862]
- From Asa Gray 27 October 1862
- From W. E. Darwin 28 October 1862
- From Henrietta Emma Darwin [29 October 1862]
- From John Lubbock 30 October 1862
- To W. E. Darwin 30 [October 1862]
- From W. E. Darwin [5 October 1862]
- From C. W. Crocker 31 October 1862
- To Hugh Falconer [7 March 1857]
- From J. D. Hooker 2 November 1862
- To J. D. Hooker 3 November [1862]
- From J. B. Jukes 3 November 1862
- To J. D. Hooker 4 November [1862]
- To Asa Gray 6 November [1862]
- From J. D. Hooker 7 November 1862
- To Gardeners’ Chronicle [before 8 November 1862]
- From Asa Gray 10 November 1862
- From John Scott 11 November 1862
- To J. D. Hooker [10–]12 November [1862]
- From J. D. Hooker 12 November 1862
- From Robert Swinhoe 12 November 1862
- From Hugh Falconer 12 November [1862]
- To John Scott 12 November [1862]
- To Hugh Falconer 14 November [1862]
- From J. D. Hooker [15 and] 20 November [1862]
- From John Scott 15 November [1862]
- To P. G. King 16 November [1862]
- To Ludwig Büchner 17 November [1862]
- From Asa Gray 17 November 1862
- To J. D. Hooker 18 [November 1862]
- From Adam Fitch 18 November 1862
- To John Scott 19 November [1862]
- From John Scott [20 November – 2 December 1862]
- To H. W. Bates 20 November [1862]
- DCP-LETT-3817
- To T. F. Jamieson 21 November 1862
- To John Higgins 21 November 1862
- To Daniel Oliver 23 [November 1862]
- To Asa Gray 23 November [1862]
- From Edward Blyth 23 November 1862
- To J. D. Hooker 24 [November 1862]
- From Asa Gray 24 November 1862
- From C. W. Crocker 24 November 1862
- From H. W. Bates 24 November 1862
- To Journal of Horticulture [before 25 November 1862]
- To H. W. Bates 25 November [1862]
- From Daniel Oliver 25 November 1862
- From Richard Trevor Clarke [after 25 November 1862]
- To Asa Gray 26[–7] November [1862]
- From J. D. Hooker 26 November 1862
- To William Allport Leighton 26 November [1862]
- From Robert Monsey Rolfe, Lord Cranworth 28 November 1862
- To J. D. Hooker [after 26] November [1862]
- To W. E. Darwin 30 November [1861]
- From Arthur Mellersh 30 November [1862]
- From R. T. Clarke [after 27 November 1862]
- From Mary Butler [before 25 December 1862]
- To Pickard & Stoneman 1 December [1862]
- To Journal of Horticulture [before 2 December 1862]
- From T. H. Huxley 2 December 1862
- From Robert Swinhoe 2 December 1862
- From Patrick Matthew 3 December 1862
- To John Scott 3 December [1862]
- From James Dwight Dana 4 December 1862
- From J. D. Hooker [14 December 1862]
- From John Scott 6 December [1862]
- To T. H. Huxley 7 December [1862]
- To T. W. Woodbury 7 December [1862]
- DCP-LETT-3849F
- From Asa Gray 9 December 1862
- From Julius von Haast 9 December 1862
- To Thomas Henry Huxley 10 [January 1863]
- To John Scott 11 December [1862]
- From Edinburgh Royal Medical Society [before 12 December 1862]
- To William Forsell Kirby 12 December [1862]
- To J. D. Hooker 12 [December 1862]
- From J. D. Hooker [21 December 1862]
- From A. C. Ramsay 13 December 1862
- DCP-LETT-3858
- From E. A. Darwin 14 December [1862?]
- To A. C. Ramsay 14 December [1862]
- To H. W. Bates 15 December [1862]
- From John Lubbock 15 December 1862
- From J. B. Innes 16 December [1862]
- To John Lubbock 16 [December 1862]
- From John Scott 17 December [1862]
- To T. H. Huxley 18 December [1862]
- From John Lubbock 18 December 1862
- To John Scott 19 December [1862]
- To W. B. Tegetmeier 28 [December 1862]
- To George William Johnson or Robert Hogg 20 December [1862]
- To J. D. Hooker [21 December 1862]
- To J. B. Innes 22 December [1862]
- From Francis Boott 22 December [1862]
- To [Camilla] Ludwig 22 December 1862
- To Thomas Rivers 23 December [1862]
- To James Anderson 23 December [1862]
- To J. D. Hooker 24 December [1862]
- From Francis Boott 26 December 1862
- To W. B. Tegetmeier 27 [December 1862]
- To T. H. Huxley 28 December [1862]
- To Thomas Rivers 28 December [1862]
- From J. D. Hooker [before 29 December 1862]
- To G. H. K. Thwaites 29 December [1862]
- To J. D. Hooker 29 [December 1862]
- From Asa Gray 29 December 1862
- To Hugh Falconer 29 December [1862]
- To Journal of Horticulture [before 27 December 1862]
- To J. D. Hooker [1 March – 15 May 1862]
- DCP-LETT-3885
- To Charles Turner [1 April – 16 June 1863?]
- From George Howard Darwin [before 11 May 1863]
- DCP-LETT-3888
- DCP-LETT-3889
- To Richard Kippist 27 [February or March 1861?]
- From J. D. Hooker [31 December 1862]
- From J. D. Hooker [27 or 28 December 1862]
- From J. D. Hooker [12 January 1863]
- To George Henry Turnbull [16? February 1863]
- From Daniel Oliver [26 March 1863]
- From W. E. Darwin [28 June 1863?]
- To Natural History Review [before 10 October 1862]
- To T. H. Huxley [before 25 February 1863]
- To Asa Gray 2 January [1863]
- To Williams & Norgate [7 February 1863 or earlier]
- To J. D. Hooker 3 January [1863]
- From Hugh Falconer 3 January [1863]
- To John Lubbock 4 January [1863]
- To Hugh Falconer 5 [and 6] January [1863]
- From J. D. Hooker 6 January 1863
- From John Lubbock 6 January [1863]
- From John Scott 6 January 1863
- To James Dwight Dana 7 January [1863]
- To Thomas Rivers 7 January [1863]
- DCP-LETT-3907
- From Hugh Falconer 8 January [1863]
- To John Scott 8 January [1863]
- From Hugh Falconer 9 January 1863
- To Thomas Rivers 11 January [1863]
- To Henry Walter Bates 12 January [1863]
- From George Varenne Reed 12 January 1863
- To J. D. Hooker 13 January [1863]
- To Smith, Elder & Company 14 January [1863]
- From Alfred Russel Wallace 14 January [1863]
- From J. P. Thom 14 January 1863
- To Alphonse de Candolle 14 January [1863]
- To Thomas Rivers 15 January [1863]
- From J. D. Hooker [15 January 1863]
- From George Bentham 16 January 1863
- From John Scott 16 January 1863
- To Thomas Rivers 17 [January 1863]
- From Henri Louis Frédéric de Saussure 17 January 1863
- From Isaac Anderson-Henry 17 January 1863
- From H. W. Bates 17 January [1863]
- From Hugh Falconer 18 January [1863]
- To Asa Gray 19 January [1863]
- To Hugh Falconer 20 [January 1863]
- To Isaac Anderson-Henry 20 January [1863]
- DCP-LETT-3930
- DCP-LETT-3931
- DCP-LETT-3932
- From Thomas Rivers 21 January 1863
- To John Scott 21 January [1863]
- To Julius von Haast 22 January 1863
- To John Murray 22 January [1863]
- From Daniel Oliver 22 January 1863
- From Francis Boott 23 January 1863
- To John Lubbock 23 [February 1863]
- From J. D. Hooker 24 January 1863
- From H. W. Bates 24 January 1863
- To T. F. Jamieson 24 January [1863]
- To Thomas Rivers 25 January [1863]
- To Hermann Crüger 25 January [1863]
- To W. B. Tegetmeier 26 [January 1863]
- To H. W. Bates 26 January [1863]
- From Thomas Rivers 26 January 1863
- From Friedrich Rolle 26 January 1863
- From Isaac Anderson-Henry 26–7 January 1863
- To Francis Trevelyan Buckland 26 January [1863]
- From W. B. Tegetmeier [after 26 January 1863]
- From Asa Gray 27 January 1863
- To Journal of Horticulture and Cottage Gardener [before 27 January 1863]
- From Thomas Francis Jamieson 28 January 1863
- To J. D. Hooker 30 January [1863]
- To Friedrich Rolle 30 January [1863]
- From Thomas Rivers 30 January 1863
- To Roland Trimen 31 January [1863]
- To Alphonse de Candolle 31 January [1863]
- From Isaac Anderson-Henry 31 January 1863
- From Henry Holland [10 February 1863]
- From F. T. Buckland [before 1 February 1863]
- To F. T. Buckland 1 February [1863]
- To Thomas Rivers 1 February [1863]
- To John Joseph Briggs 2 February [1863]
- To Isaac Anderson-Henry 2 February [1863]
- From Thomas Rivers [3 February 1863]
- To Journal of Horticulture and Cottage Gardener [before 3 February 1863]
- From William Henry Harvey 3 February 1863
- To Charles Lyell 4 [February 1863]
- From Bartholomew James Sulivan 4 February [1863]
- From J. D. Dana 5 February 1863
- From W. D. Fox 6 February [1863]
- From James Paget 7 February 1863
- To Charles Victor Naudin 7 February 1863
- To T. H. Huxley [8 February 1863]
- From Camille Dareste 8 February 1863
- To W. D. Fox [10 February 1863]
- From B. J. Sulivan 10 February [1863]
- From Henrietta Grace Powell 11 February 1863
- From Frederick Smith 11 February 1863
- From W. D. Fox [11 February 1863]
- From Ludolph Christian Treviranus 12 February 1863
- DCP-LETT-3981
- To Thomas Rivers [14 February 1863]
- From Edwin Brown 14 February 1863
- From S. P. Woodward 14 February 1863
- From Isaac Anderson-Henry 14 February 1863
- CD memorandum 14 February 1863
- To J. D. Hooker 15 February [1863]
- To T. H. Huxley 16 February [1863]
- To Roland Trimen 16 February [1863]
- From J. D. Hooker [16 February 1863]
- To Horace Benge Dobell 16 February [1863]
- To John Scott 16 February [1863]
- To Camille Dareste 16 February [1863]
- To J. J. Briggs 16 February [1863]
- To T. H. Huxley [after 16 February 1863]
- To Charles Lyell 17 [February 1863]
- From Richard Frean 17 February 1863
- From George Henry Kendrick Thwaites 17 February 1863
- From W. B. Tegetmeier 18 February 1863
- To T. H. Huxley 18 [February 1863]
- From John Scott 18 February [1863]
- To W. B. Tegetmeier 19 February [1863]
- From George Maw 19 February 1863
- To J. D. Dana 20 February [1863]
- From T. H. Huxley 20 February 1863
- From John Lubbock 20 February 1863
- To John Scott 20 [February 1863]
- To J. D. Hooker [21 February 1863]
- To Richard Frean 22 February 1863
- To Asa Gray 23 February [1863]
- From J. D. Hooker [23 February 1863]
- From Hermann Crüger 23 February 1863
- To J. D. Hooker 24[–5] February [1863]
- From T. H. Huxley 25 February 1863
- From J. D. Hooker [26 February 1863]
- From George Maw 25 February 1863
- To T. H. Huxley 26 [February 1863]
- From Francis Walker 26 February 1863
- From the Royal Prussian Academy of Sciences, Berlin 26 February 1863
- From Daniel Oliver 27 February 1863
- From Thomas Wright 27 February 1863
- From John Lubbock 28 February 1863
- To George Maw 28 February [1863]
- From J. D. Hooker [1 March 1863]
- From Smith, Elder and Company 3 March 1863
- From John Scott 3 March 1863
- To H. W. Bates 4 March [1863]
- To Thomas Rivers 5 March [1863]
- To J. D. Hooker 5 March [1863]
- To Smith, Elder and Company 5 March [1863]
- From Julius von Haast 5 March 1863
- From H. B. Dobell 5 March 1863
- To Charles Lyell 6 March [1863]
- From John Lubbock 6 March 1863
- To H. B. Dobell 6 March [1863]
- To John Scott 6 March 1863
- From Smith, Elder and Company 9 March 1863
- To W. D. Fox 9 March [1863]
- To Smith, Elder and Company 10 March [1863]
- From Charles Lyell 11 March 1863
- From W. E. Darwin 12 March [1863]
- From J. D. Hooker [6 March 1863]
- From W. D. Fox 12 March [1863]
- To Charles Lyell 12–13 March [1863]
- To J. D. Hooker 13 [March 1863]
- From J. D. Hooker [15 March 1863]
- From Charles Lyell 15 March 1863
- To [Thomas White Woodbury] 15 March [1863]
- To the secretary, Royal Prussian Academy of Sciences, Berlin 16 March 1863
- To W. D. Fox 16 [March 1863]
- From James Paget 16 March 1863
- From Roland Trimen 16 March 1863
- To Charles Lyell 17 March [1863]
- To J. D. Hooker 17 March [1863]
- From T. W. Woodbury 17 March 1863
- To T. W. Woodbury [after 17 March 1863]
- DCP-LETT-4051
- To Daniel Oliver 20 [February 1863]
- To Asa Gray 20 March [1863]
- From Alfred Newton 21 March 1863
- From John Scott 21 March [1863]
- From Asa Gray 22–30 March 1863
- To W. D. Fox 23 March [1863]
- To an editor 24 March [1863?]
- To Daniel Oliver 24–5 March [1863]
- To John Scott 24 March [1863]
- To J. D. Hooker 26 [March 1863]
- From Edward Blyth 27 March 1863
- From Joseph Wolstenholme to William Erasmus Darwin [27 March 1863?]
- To Daniel Oliver 28 March [1863]
- From J. D. Hooker [28 March 1863]
- To J. D. Hooker [29 March 1863]
- From Armand de Quatrefages 25 March 1863
- To G. H. K. Thwaites 30 March [1863]
- To Daniel Oliver 31 March [1864]
- To Journal of Horticulture and Cottage Gardener [17–24 March 1863]
- From Richard Trevor Clarke [April? 1863]
- From James Anderson 1 April 1863
- From Arthur Rawson 1 April [1863]
- To Arthur Rawson 2 April [1863]
- From John Scott [1–11] April [1863]
- From Arthur Rawson [6 April 1863]
- To J. F. Lennard from the parishioners of Down, Kent 3 April 1863
- To John Lubbock 5 April [1863]
- To Maxwell Tylden Masters 6 April [1863]
- From John Lubbock 7 April 1863
- From Edward Blyth 7 April 1863
- From H. W. Bates 8 April 1863
- To H. W. Bates 9 April [1863]
- From Asa Gray 11 April 1863
- From Armand de Quatrefages [28 March] – 11 April 1863
- To Daniel Oliver [12 April 1863]
- To John Scott 12 April [1863]
- To George Gabriel Stokes [12 February 1863?]
- DCP-LETT-4086
- From John Scott [after 12] April [1863]
- From David Thomas Ansted 13 April 1863
- From Asa Gray 13 April 1863
- To William Henry Flower 13 April [1863]
- To M. T. Masters [8–13 April 1863]
- From M. T. Masters 14 April 1863
- From Daniel Oliver 14 April 1863
- From Robert Swinhoe 14 April 1863
- To Armand de Quatrefages [14 April 1863]
- To Daniel Oliver [after 14 April 1863]
- From George Bentham [c. 14 April 1863]
- To Daniel Oliver 15 April [1862]
- From J. D. Hooker [31 March 1863]
- To D. T. Ansted 15 April 1863
- To George Bentham 15 April [1863]
- From W. H. Flower 15 April 1863
- From William Hepworth Dixon 16 April 1863
- To J. D. Hooker [17 April 1863]
- From D. T. Ansted 17 April 1863
- From Isaac Anderson-Henry 17 April 1863
- To Charles Lyell 18 April [1863]
- To H. W. Bates 18 April [1863]
- To Athenæum 18 April [1863]
- From P. G. King 19 April 1863
- To Asa Gray 20 April [1863]
- From J. D. Hooker 20 April 1863
- From Asa Gray 20 April 1863
- From Hugh Falconer 20 April [1863]
- To John Scott 20 [June 1863]
- From H. B. Dobell 20 April 1863
- From H. W. Bates 20 April 1863
- To H. B. Dobell 21 April [1863]
- From George Bentham 21 April 1863
- From John Hutton Balfour 22 April 1863
- To George Bentham 22 April [1863]
- From W. E. Darwin 22 April [1863]
- To Hugh Falconer 22 April [1863]
- To J. D. Hooker 23 April [1863]
- From D. T. Ansted 23 April 1863
- From Hermann Crüger 23 April 1863
- From Hugh Falconer 24 April [1863]
- From Isaac Anderson-Henry 24 April 1863
- To Lovell Augustus Reeve 25 April [1863]
- From George Maw 25 April 1863
- From John James Aubertin 27 April 1863
- From Edward Cresy 27 April 1863
- To Andrew Crombie Ramsay 29 April [1863]
- To H. W. Bates 30 April [1863]
- From J. D. Hooker [30 April 1863]
- From J. D. Hooker [23–7 May 1863]
- From Charles William Crocker 1[–4] May 1863
- From W. E. Darwin 1 May [1863]
- To Isaac Anderson-Henry 2 May [1863]
- To John Scott 2 May [1863]
- From H. W. Bates 2 May [1863]
- From W. E. Darwin 4 May [1863]
- From Charles and Emma Darwin to William Erasmus Darwin [4 May 1863]
- To W. E. Darwin [5 May 1863]
- From William Alexander Wooler 5 May 1863
- To Athenæum 5 May [1863]
- From A. C. Ramsay 6 May 1863
- From J. D. Hooker [7 May 1863]
- To Charles Lyell [7 May 1863]
- From Isaac Anderson-Henry 7 May 1863
- From W. E. Darwin 8 May [1863]
- To George Snow 8 May 1863
- To J. D. Hooker [9 May 1863]
- From W. H. Flower 9 May 1863
- From Charles Lyell 9 May 1863
- To Thomas Rivers [9 May 1863]
- To W. E. Darwin [10 May 1863]
- From Henry Fletcher Hance 10 May 1863
- To Asa Gray 11 May [1863]
- To Osbert Salvin 11 [May 1863]
- From J. D. Hooker [8 May 1863]
- From Osbert Salvin 12 May 1863
- From John Edward Gray 12 May 1863
- To George Maw 12 May [1863]
- To W. H. Flower 12 May [1863]
- From H. B. Dobell 12 May 1863
- To Richard Kippist 13 May [1863 or 1868]
- From Julius von Haast 13 May 1863
- From Hugh Algernon Weddell 13 May 1863
- To H. B. Dobell 13 May [1863]
- From George Chichester Oxenden 13 May 1863
- To Edward Cresy 13 May [1863]
- From J. D. Hooker [13 May 1863]
- To James Digues La Touche 14 May [1863?]
- To Armand de Quatrefages 14 May [1863]
- From La Société des Sciences Naturelles de Neuchâtel 14 May 1863
- To J. D. Hooker 15 and 22 May [1863]
- From Isaac Anderson-Henry 16 May 1863
- From W. E. Darwin 17 and 20 May [1863]
- From J. D. Hooker [24 May 1863]
- From Lydia Ernestine Becker 18 May 1863
- From Armand de Quatrefages 19 May [1863]
- From George Bentham 21 May 1863
- From L. E. Becker 21 May [1863]
- From John Scott 21 May [1863]
- From John Scott [26 July – 2 August 1863]
- To George Bentham 22 May [1863]
- From John Scott 22 May 1863
- From W. D. Fox [16–22 May 1863]
- To Roland Trimen 23 May [1863]
- To J. D. Hooker 23 May [1863]
- To W. D. Fox 23 May [1863]
- From L. E. Becker 23–4 May [1863]
- To John Scott 23 May [1863]
- To Hermann Crüger 25 May [1863]
- To John Scott 25 and 28 May [1863]
- To W. H. Flower 25 May [1863]
- To Lydia Ernestine Becker [26 or 27 May 1863]
- From Asa Gray 26 May 1863
- From John Scott 26 May [1863]
- From John Thomas Austen 27 May 1863
- From L. E. Becker 28 May [1863]
- From John Scott 28 May [1863]
- To J. D. Hooker 29 May [1863]
- From J. T. Austen 29 May 1863
- From W. D. Fox 29 May [1863]
- From Philip Henry Gosse 30 May 1863
- From J. T. Austen 30 May 1863
- To Asa Gray 31 May [1863]
- To John Higgins 31 May 1863
- To John Scott 31 May [1863]
- From Asa Gray [10–16] June [1863]
- To W. E. Darwin [25 July 1863]
- To P. H. Gosse 2 June [1863]
- From J. T. Austen 3 June 1863
- From John Scott [3 June 1863]
- From P. H. Gosse 4 June 1863
- From S. P. Woodward 5 June 1863
- To P. H. Gosse 5 June [1863]
- To John Scott 6 June [1863]
- To J. D. Hooker 8 [June 1863]
- From G. H. K. Thwaites 8 June 1863
- From G. H. Darwin [9–15 June 1863]
- From J. D. Hooker 10 June 1863
- From Booth Bacon 10 June 1863
- To John Scott 11 June [1863]
- From John Scott 16 June [1863]
- From J. T. Austen 17 June 1863
- From James Anderson 18 June 1863
- From J. D. Hooker 19 June 1863
- To George Bentham 19 June [1863]
- To C. T. Whitley 20 June [1863]
- From William Allport Leighton [before 21 June 1863]
- To J. D. Hooker 23 [June 1863]
- From Jacques Boucher de Perthes 23 June 1863
- To Charles Loring Brace 24 June [1863]
- To J. D. Hooker 25 [June 1863]
- To Asa Gray 26 June [1863]
- From W. E. Darwin 27 June [1863?]
- To T. H. Huxley 27 June [1863]
- From J. D. Hooker [2]9 June 1863
- From J. D. Hooker [21 July 1863]
- From J. D. Hooker [31 July 1863]
- To J. D. Hooker 1 July [1863]
- From T. H. Huxley 2 July 1863
- To John Scott 2 July [1863]
- To Gardeners’ Chronicle 2 July [1863]
- DCP-LETT-4231
- To T. H. Huxley 3 July [1863]
- From Asa Gray to J. D. Hooker 6 July 1863
- From W. B. Tegetmeier 29 June – 7 July 1863
- From Asa Gray 7 July 1863
- From L. E. Becker 8 July [1863]
- From George Sigerson 8 July 1863
- To William Forsell Kirby 9 July [1863]
- To W. B. Tegetmeier 9 July [1863]
- To H. B. Dobell 17 July [1864]
- From P. H. Gosse 13 July 1863
- To J. D. Hooker 14 July [1863]
- From Friedrich Hildebrand 16 July 1863
- From Roland Trimen 16, 17, and 19 July 1863
- To Daniel Oliver 18 July [1863]
- To Julius von Haast 18 July [1863]
- To J. J. Aubertin 19 July 1863
- From Daniel Oliver 20 July 1863
- From Asa Gray 21 July 1863
- From Julius von Haast 21 July [– 7? August] 1863
- To J. D. Hooker 22 July [1863]
- From George Brettingham Sowerby Jr to Emma Darwin 22 July 1863
- From W. E. Darwin 23 July [1863]
- From John Scott 23 July [1863]
- To John Scott 25 [July 1863]
- To J. D. Hooker 26 [July 1863]
- To Friedrich Hildebrand 28 July [1863]
- To G. H. K. Thwaites 29 July [1863]
- From Robert Swinhoe 29 July 1863
- From L. E. Becker 31 July [1863]
- From Edward Bradford 31 July 1863
- To John Scott 1 and 3 August [1863]
- To L. E. Becker 2 August [1863]
- From Henrietta Emma Darwin [1 August 1863]
- To J. D. Hooker 3 August [1863]
- To Asa Gray 4 August [1863]
- To Alphonse de Candolle 4 August [1863]
- From Julius von Haast 6 August 1863
- From Hermann Crüger 8 August 1863
- To J. D. Hooker 12–13 August [1863]
- To Charles Lyell 14 August [1863]
- From Robert Swinhoe 14 August 1863
- To Gardeners’ Chronicle [before 15 August 1863]
- To Thomas Rivers 17 August [1863]
- From W. E. Darwin 21 August [1863]
- From John Goodsir 21 August [1863]
- To A. D. Bartlett 24 August [1860]
- From Hugh Falconer 24 August [1863]
- To J. D. Hooker 25 [August 1863]
- From J. D. Hooker 26 August 1863
- From J. D. Hooker [27 August 1863]
- To Hugh Falconer [25–6 August 1863]
- From John Goodsir 27 August [1863]
- To Roland Trimen 27 August [1863]
- To [Gardeners’ Chronicle] [after 27 August 1863]
- To J. D. Hooker [28 August 1863]
- From John Goodsir 28 August [1863]
- To Gardeners’ Chronicle [before 29 August 1863]
- From John Brodie Innes 29 August [1863]
- From Hugh Falconer 29 August 1863
- DCP-LETT-4285
- To John Price [8 September – 13 October 1863]
- To J. B. Innes 1 September [1863]
- From Asa Gray 1 September 1863
- From J. J. Aubertin 3 September 1863
- From J. B. Innes 4 September [1863]
- From John Lubbock 4 September 1863
- To W. D. Fox 4 [September 1863]
- To Hugh Falconer 4 [September 1863]
- From Emma Darwin to W. D. Fox [6–27 September 1863]
- From Edward Levett Darwin 7 September 1863
- From W. D. Fox 7 September [1863]
- From W. F. Kirby 8 September [1863]
- From Hugh Falconer 10 September 1863
- From the secretary of the Philosophical Institute of Canterbury, New Zealand 14 September 1863
- DCP-LETT-4299
- From Edward Blyth 21 September 1863
- From John Scott 21 September [1863]
- From Emma Darwin to John Scott 23 September [1863]
- From G. H. K. Thwaites 24 September 1863
- From Emma Darwin to John Scott 24 September [1863]
- From Joanna Baillie Horner 24 September 1863
- From J. D. Hooker 15 September 1863
- From John Scott to Emma Darwin 25 September [1863]
- From A. R. Wallace 26 September 1863
- From J. D. Hooker [28 September 1863]
- To A. R. Wallace [29? September 1863]
- From Louis Agassiz 29 September 1863
- From Emma Darwin to W. D. Fox [29 September 1863]
- From H. W. Bates 29 September 1863
- From W. B. Tegetmeier [c. 26 September 1863]
- From George Busk [c. 27 August 1863]
- From Robert Monsey Rolfe [20 November 1863]
- From J. D. Hooker 1 October 1863
- To J. D. Hooker [4 October 1863]
- From Roland Trimen 10, 13, and 18 October 1863
- From John Lubbock 14 October 1863
- From H. E. Darwin to Thomas Warner 14 October [1863]
- From J. D. Hooker 23 October 1863
- From Emma Darwin to Frederick Pollock 23 October [1863?]
- From John Lubbock to Emma Darwin 24 October 1863
- From H. W. Bates 24 October 1863
- From Emma Darwin to W. E. Darwin [28 October 1863]
- To J. D. Hooker [30 October 1863]
- From J. D. Hooker [1 or 3 November 1863]
- From Alfred Newton 31 October 1863
- To Daniel Oliver [before 27 November 1863]
- From Daniel Oliver [27 March 1863]
- To Daniel Oliver 3 November [1861]
- From J. D. Hooker [3 November 1865]
- From Emma Darwin to Alfred Newton 4 November [1863]
- From John Lubbock to Emma Darwin 6 November 1863
- To John Scott 7 November [1863]
- From E. A. Darwin to Moncure Daniel Conway 9 November 1863
- From E. A. Darwin 9 November [1863]
- To J. D. Hooker 10 [November 1863]
- From George Clendon Jr 10 November 1863
- From Friedrich Hildebrand 10 November 1863
- From E. A. Darwin to M. D. Conway 11 November 1863
- From J. D. Hooker to Emma Darwin 11 November 1863
- From E. A. Darwin 12 November [1860–8]
- From Edward Sabine to John Phillips 12 November 1863
- To J. D. Hooker [13 November 1863]
- To J. D. Hooker 16 [November 1863]
- From Emma Darwin to John Scott 19 November [1863]
- From Emma Darwin to Friedrich Hildebrand 20 November [1863]
- From Emma Darwin to Patrick Matthew 21 November [1863]
- To J. D. Hooker [22–3 November 1863]
- From Asa Gray 23 November 1863
- To Roland Trimen 25 November [1863]
- To J. D. Hooker 27 [November 1863]
- From Daniel Oliver 27 November 1863
- To Daniel Oliver 28 [November 1863]
- From Emma Darwin to J. D. Hooker [7 December 1863]
- From Emma Darwin to John Murray [before 17 December 1863]
- To J. D. Hooker 5 [December 1863]
- To William Henry Benson 7 December [1855]
- From Emma Darwin to W. D. Fox 8 December [1863]
- From Emma Darwin to Julius von Haast 12 December [1863]
- From J. B. Innes 17 December [1863]
- From Emma Darwin to Alphonse de Candolle 17 December [1863]
- From Emma Darwin to J. D. Hooker 26 December [1863]
- From Emma Darwin to George Maw 28 December 1863
- To the Geological Society of London [c. 28 December 1863]
- To Ernst Haeckel 30 December [1863] – 3 January [1864]
- To John Higgins 4 December 1863
- From Hugh Falconer 31 December [1863]
- From Francis Trevelyan Buckland [before 11 December 1864]
- From E. A. Darwin [after 31 March 1864?]
- From Erasmus Alvey Darwin [1864?]
- From Daniel Oliver [after 20 July 1863]
- From William Jenner [after 24 November] 1864
- From William Jenner to Emma Darwin [17 March 1864]
- From W. E. Darwin [after 19 May 1864]
- From Lucy Caroline Wedgwood [April–May 1865?]
- To Edouard Claparède [c. 16 April 1862]
- From Richard Spruce [1876–7]
- To K. E. S., L. C., and M. S. Wedgwood 4 [August 1862]
- From E. A. Darwin to Emma Darwin 30 [March 1864?]
- To John Lubbock [1 January 1864]
- To [‘Julian’] [c. 1864]
- To Alfred Russel Wallace 1 January 1864
- From Ernst Haeckel 2 January 1864
- From A. R. Wallace 2 January 1864
- To A. R. Wallace [c. 10 April 1864]
- From E. A. Darwin 5 January [1864]
- From Charles Spence Bate 6 January 1864
- From Thomas Rivers 6 January [1865]
- From John Scott 7 January [1864]
- From Emma Darwin to John Scott 9 January 1864
- DCP-LETT-4383F
- From John Lubbock 10 January 1864
- From John Scott [13 January 1864]
- From John Scott 12 [February 1864]
- From John Brodie Innes to Emma Darwin 16 January [1864]
- From Thomas Henry Huxley 16 January 1864
- To J. D. Hooker [10 and 12 January 1864]
- From A. R. Wallace [23 January 1863?]
- From Mary Boott 18 January 1864
- From Robert Goodwin Mumbray 18 January 1864
- From Charles Parker 18 January 1864
- From Hermann Crüger 21 January 1864
- From J. B. Innes to Emma Darwin 23 January [1864]
- From J. D. Hooker 24 January 1864
- To J. D. Hooker [25 January 1864]
- To J. D. Hooker [27 January 1864]
- From Daniel Oliver [28 January – 8 February 1864]
- From J. D. Hooker [before 9 February 1864]
- From E. A. Darwin 1 February [1864]
- DCP-LETT-4400A
- From J. D. Hooker 5 February 1864
- To John Scott 6 February [1864]
- To J. D. Hooker [8 February 1864]
- From J. D. Hooker 9 [March] 1864
- To John Scott 9 February [1864]
- From Emma Darwin to J. D. Hooker 15 February [1864]
- From Andrew Murray 15 February 1864
- From J. D. Hooker 16 February 1864
- From Asa Gray 16 February 1864
- To Daniel Oliver 17 February [1864]
- From Daniel Oliver 18 February 1864
- To J. D. Hooker [20–]22 February [1864]
- From J. D. Hooker [20 February 1864]
- To J. D. Hooker 24 [February 1864]
- To Asa Gray 25 February [1864]
- To J. B. Baillière et ses fils 29 February [1868]
- From William Erasmus Darwin [15 March 1864]
- From Daniel Oliver [before 31 March 1864]
- From Daniel Oliver [17 March 1864]
- To Ernst Haeckel 3 March [1864]
- DCP-LETT-4420
- From Frederick Ransome 7 March 1864
- To Ernst Haeckel 9 March 1864
- From John Scott 10 March 1864
- To Daniel Oliver 11 March [1864]
- From Daniel Oliver 12 March 1864
- From Emma Darwin to J. D. Hooker 12 March [1864]
- DCP-LETT-4427
- From J. D. Hooker 16 March 1864
- From Emma Darwin to J. D. Hooker 17 March [1864]
- To Daniel Oliver 18 March [1864]
- From Bartholomew James Sulivan 18 March [1864]
- From John Scott 19 March 1864
- From Charles Wright to Asa Gray 20, 25, and 26 March and 1 April 1864
- From W. E. Darwin 22 March [1864]
- To Alfred Newton 24 March [1863]
- To J. D. Hooker 26[–7] March [1864]
- To Armand de Quatrefages 27 March [1863]
- From John Scott 28 March 1864
- From J. D. Hooker 29 March 1864
- To Alfred Newton 29 March [1864]
- From Lydia Ernestine Becker 30 March 1864
- From H. E. Darwin to W. E. Darwin [18 May 1864]
- From Daniel Oliver [1 April 1864]
- To J. D. Hooker [1 April 1864]
- From J. D. Hooker [2 April 1864]
- From Alfred Newton 2 April 1864
- DCP-LETT-4447
- From J. D. Hooker [4 April 1864]
- From Robert Swinhoe 4 April 1864
- To J. D. Hooker 5 April [1864]
- From Philip Henry Gosse 5 April 1864
- To George Howard Darwin [after 5 April 1864?]
- From J. D. Hooker 6 April 1864
- To Alfred Newton 6 April [1864]
- From G. H. Darwin [after 6 April 1864?]
- To P. H. Gosse 7 April [1864]
- To J. D. Hooker 7 April [1864]
- From Alfred Newton 7 April 1864
- From J. D. Hooker 8 April 1864
- From E. A. Darwin 9 April [1864]
- To John Scott 9 April 1864
- To T. H. Huxley 11 April [1864]
- To Council of the Royal Horticultural Society 11 April 1864
- To Louis Agassiz 12 April 1864
- From E. A. Darwin, Charles Darwin, and W. E. Darwin to Thomas Salt 12 April 1864
- To J. D. Hooker 13 April [1864]
- From W. E. Darwin 14 April [1864]
- From John Scott 14 April [1864]
- To David J. Brown 18 April 1864
- From T. H. Huxley 18 April 1864
- From W. E. Darwin 18 April 1864
- To Asa Gray 19 April [1865]
- To J. D. Hooker 19 [April 1864]
- From J. D. Hooker 20 April 1864
- To [William Mackmurdo Hacon] 21 April [1864]
- To J. D. Hooker 25 April [1864]
- From J. D. Hooker [26 or 27 April 1864]
- From Emma Darwin to J. D. Hooker [28 April 1864]
- From J. D. Hooker [after 28 April 1864]
- From William Bennett 29 April 1864
- From [C. P.] 29 April 1864
- From Benjamin Dann Walsh 29 April – 19 May 1864
- From W. E. Darwin [30 April 1864]
- To W. E. Darwin [14–17 May 1864]
- To W. E. Darwin 3 May [1864]
- To Daniel Oliver 4 May [1864]
- From E. A. Darwin [15? April 1864]
- To W. E. Darwin 5 May [1864]
- From W. D. Fox 5 [May 1864]
- From John Scott 5 May [1864]
- To Richard Kippist 6 May [1864]
- From Emma Darwin to W. D. Fox [6 May 1864]
- From W. E. Darwin 6 May 1864
- From William Jenner to [William Walmisley Baxter?] [after 7 May 1864?]
- From E. A. Darwin 7 May [1864]
- From A. R. Wallace 10 May 1864
- From Henry Trimen 10 May 1864
- From W. E. Darwin 12 May [1864]
- To Roland Trimen 13 May 1864
- From J. D. Hooker 14 May 1864
- To W. E. Darwin 14 May [1864]
- To J. D. Hooker [15 May 1864]
- From Emma Darwin to W. D. Fox 16 May [1864]
- From John Scott 16 May [1864]
- From Emma Darwin to W. E. Darwin [17 May 1864]
- From Charles Cardale Babington 18 May 1864
- From W. E. Darwin 18 May [1864]
- From J. D. Hooker 19 May 1864
- From W. E. Darwin [19 May 1864]
- From William Henry Harvey 19 May 1864
- From W. E. Darwin [20 May 1864]
- From H. C. Watson [20 May 1864]
- To John Scott 20 May [1864]
- From C. C. Babington 21 May 1864
- To John Scott 21 May [1864]
- To J. D. Hooker 22 [May 1864]
- From W. E. Darwin [April–May 1865]
- DCP-LETT-4507
- From W. E. Darwin 24 May 1864
- From William Bennett 25 May 1864
- DCP-LETT-4509F
- To A. R. Wallace 28 [May 1864]
- To Asa Gray 28 May [1864]
- To H. C. Watson 28 May [1864]
- From John Scott 28 May [1864]
- From A. R. Wallace 29 May [1864]
- To J. D. Hooker 30 May [1864]
- To J. D. Hooker 31 [May 1864]
- To John Higgins 31 May 1864
- To J. D. Hooker 2 June [1864]
- From Julius von Haast 2 June 1864
- From J. D. Hooker [4 June 1864]
- From George Chichester Oxenden 5 June [1862 or 1864?]
- From C. C. Babington 6 June 1864
- From Patrick Matthew 6 June 1864
- From Lucy Caroline Wedgwood [6 June 1864]
- From John Scott 8 June 1864
- To J. D. Hooker 10 June [1864]
- From John Scott 10 June [1864]
- From John Scott 10 June [1864]
- To John Scott 10 June 1864
- From J. D. Hooker [11 June 1864]
- From William Marshall 12 June 1864
- To J. D. Hooker 13 June [1864]
- To Daniel Oliver [c. 10 June 1864]
- To W. B. Tegetmeier 14 June [1861]
- From Daniel Oliver 14 June 1864
- To A. R. Wallace 15 June [1864]
- To Daniel Oliver 15 June [1864]
- From J. D. Hooker 15 June 1864
- From Bernard Peirce Brent 18 June 1864
- From W. E. Darwin 18 June [1864]
- From Daniel Oliver 18 June 1864
- To John Traherne Moggridge 19 June [1864]
- From John Scott 20 June [1864]
- From Friedrich Hildebrand 21 June 1864
- From J. D. Hooker 23 June 1864
- To J. D. Hooker 25 [June 1864]
- To Friedrich Hildebrand 25 June [1864]
- From E. A. Darwin 27 June [1864]
- To Frances Emma Elizabeth Wedgwood 28 June [1864]
- From E. A. Darwin 30 June [1864]
- To E. A. Darwin 30 June 1864
- From Charles Parker 1 July 1864
- From E. A. Darwin to Hugh Falconer 2 July 1864
- DCP-LETT-4551
- From J. D. Hooker 5 July 1864
- From George Chichester Oxenden 5 July [1862]
- To George Bentham 7 July [1864]
- From Ernst Haeckel 9 [July 1864]
- From George Bentham 10 July 1864
- From Andrew Crombie Ramsay 10 July 1864
- From Asa Gray 11 July 1864
- To W. H. Flower 11 July [1863]
- To A. C. Ramsay 12 July [1864]
- To J. D. Hooker 12 July [1864]
- To George Bentham 12 July [1864]
- To J. T. Moggridge 1[7] July [1864]
- To Daniel Oliver 13 July [1864]
- From G. C. Oxenden 13 July [1862]
- To Daniel Oliver [22 July 1864]
- From J. T. Moggridge 15 July [1864]
- From Horace Benge Dobell 15 July 1864
- To Ernst Haeckel 19 July [1864]
- From J. T. Moggridge 19 July [1864]
- From Daniel Oliver 21 July 1864
- From J. D. Hooker [21 July 1864]
- To J. D. Hooker [24 July 1864?]
- From Robert Thomson 24 July 1864
- From John Lubbock 28 July 1864
- To J. D. Hooker [5 August 1864]
- From Richard Spruce to J. D. Hooker 29 July 1864
- From John Scott 29 July [1864]
- From Edward Cresy 29 July 1864
- From J. S. Bowerbank 1 August 1864
- To ? 1 August [1864 or 1865]
- From G. C. Oxenden 1 August 1864
- From John Scott 2 August 1864
- From G. C. Oxenden 4 August [1864?]
- From J. D. Hooker [29 July 1864]
- From J. D. Hooker [4–]6 August 1864
- From Ernst Haeckel 10 August 1864
- From Joseph Beete Jukes 10 August 1864
- To J. D. Hooker 11 August [1864]
- From William Jenner 14 August 1864
- From J. D. Hooker [15 August 1864]
- From George Varenne Reed 15 August 1864
- To J. D. Hooker [16 August 1864]
- To J. D. Hooker 17 August [1864]
- DCP-LETT-4594
- From A. C. Ramsay 18 August 1864
- From Roderick Impey Murchison 19 August 1864
- To J. D. Hooker [23 August 1864]
- To E. W. V. Harcourt 23 August [1856]
- To J. D. Hooker [25 August 1864]
- From J. D. Hooker 26 August 1864
- To J. D. Hooker 28 August [1864]
- From J. D. Hooker 30 August 1864
- From Ellen Frances Lubbock [27 August – 1 September 1865]
- DCP-LETT-4604
- To J. D. Hooker [1 September 1864]
- From John Lubbock 2 September 1864
- From B. P. Brent 2 September 1864
- To Auguste Laugel 4 September [1864]
- From J. D. Hooker 5 September 1864
- From Hermann Kindt 5 September 1864
- From W. E. Darwin 9 September [1867]
- To Hermann Kindt 7 September [1864]
- To Edward Cresy 7 September [1865]
- To Asa Gray 13 September [1864]
- To J. D. Hooker 13 September [1864]
- To John Hutton Balfour 15 September [1864]
- From J. D. Hooker 16 September 1864
- From Hermann Kindt 16 September 1864
- DCP-LETT-4615A
- To Daniel Oliver 17 September [1864]
- From J. D. Hooker [19 September 1864]
- From Maxwell Tylden Masters 19 September 1864
- To M. T. Masters 20 September [1864]
- From Hermann Kindt 20 September 1864
- From J. H. Balfour 22 September 1864
- To J. D. Hooker 23 September [1864]
- From B. J. Sulivan 23 September [1864]
- From J. D. Hooker [28 September 1864]
- To T. H. Huxley 3 October [1864]
- From Asa Gray 3 October 1864
- From Robert Monsey Rolfe 4 October 1864
- From T. H. Huxley 5 October 1864
- From John Beck 6 October 1864
- To Gardeners’ Chronicle [before 8 October 1864]
- To J. D. Hooker 8 October [1864]
- To Ernst Haeckel [after 10] August – 8 October [1864]
- From John Cook Gould 10 October 1864
- From James Buckman 10 October 1864
- From George Edward Frere 8 October 1864
- From Hermann Kindt 11 October 1864
- To Charles Buxton 12 October [1864]
- From Charles Wentworth Dilke 12 October 1864
- DCP-LETT-4635
- To Hugh Falconer 15 October [1858]
- From William Jenner 15 October 1864
- From J. D. Hooker [16? October 1864]
- To Edward Cresy 19 October [1865]
- From W. D. Fox 2[0–9?] October [1871 or 1873?]
- To B. D. Walsh 21 October [1864]
- From Charles Buxton 21 October 1864
- To J. D. Hooker 22 October [1864]
- To Daniel Oliver 24 October [1865]
- From Hugh Falconer to William Sharpey 25 October 1864
- From J. D. Hooker 26[–8] October 1864
- From Ernst Haeckel 26 October 1864
- To Asa Gray 29 October [1864]
- From Andrew Murray 31 October 1864
- To Andrew Murray 2 November [1864]
- To J. D. Hooker 3 November [1864]
- From Edward Sabine 3 November 1864
- From Hugh Falconer 3 November 186[4]
- From John Lubbock 3 November 1864
- To Ray Society [before 4 November 1864]
- From T. H. Huxley 4 November 1864
- To Hugh Falconer 4 November [1864]
- DCP-LETT-4657
- From Charles Lyell 4 November 1864
- From Henry Holland 4 November [1864]
- To Edward Sabine 5 November [1864]
- To T. H. Huxley 5 November [1864]
- To Henry Holland 6 November [1864]
- From Hugh Falconer 7 November [1864]
- From B. D. Walsh 7 November 1864
- To Hugh Falconer 8 November [1864]
- From W. H. Harvey 8 November [1864]
- From William Jenner 9 November 1864
- From J. D. Hooker [23 November 1864]
- From W. H. Harvey 10 November 1864
- From Hugh Falconer 10 November [1864]
- From W. H. Harvey 11 November 1864
- From E. A. Darwin to Emma Darwin 11 November [1863]
- To Hurst & Blackett 15 November [1863]
- To Robert Scot Skirving 16 November [1861–8]
- To John Lubbock 19 November [1864]
- From William Robinson 19 November 1864
- To Ernst Haeckel 21 November [1864]
- From William Jenner 21 November 1864
- To Richard Kippist 24 November [1864]
- From William Jenner 24 November 1864
- To Roland Trimen 25 November 1864
- From Richard Trevor Clarke 25 November [1864]
- To J. D. Hooker 26 November [1864]
- From W. D. Fox 28 November [1864]
- From J. D. Hooker 29 November 1864
- To W. D. Fox 30 November [1864]
- To Editor of the Natural History Review [December? 1864]
- From W. B. Tegetmeier [before 21 December 1864]
- From E. A. Darwin [before 30 November 1864]
- From George Busk 1 December 1864
- From E. A. Darwin 1 December 1864
- To John Higgins 1 December 1864
- From John Obadiah Westwood 2 December 1864
- From T. H. Huxley to J. D. Hooker 3 December 1864
- From J. D. Hooker 2 December 1864
- From Hugh Falconer 2 December 1864
- To Edward Sabine 4 December [1864]
- To B. D. Walsh 4 December [1864]
- To George Busk 4 December [1864]
- To J. D. Hooker 4 December [1864]
- To Hugh Falconer 4 December [1864]
- To B. D. Walsh [4 December 1864?]
- From Asa Gray 5 December 1864
- From George Gabriel Stokes to T. H. Huxley 5 December 1864
- From G. G. Stokes to T. H. Huxley 5 December 1864
- From T. H. Huxley to G. G. Stokes 6 December 1864
- From C. V. Naudin 6 December 1864
- From G. G. Stokes to T. H. Huxley 7 December 1864
- From Elizabeth Juliana Sabine 7 December [1864]
- From T. H. Huxley to G. G. Stokes 8 December 1864
- To C. V. Naudin 8 December [1864]
- From J. D. Hooker [6 December 1864]
- From G. G. Stokes to T. H. Huxley 8 December 1864
- To [Frederick Wollaston Hutton] 8 December [1864]
- From T. H. Huxley to G. G. Stokes 9 December 1864
- To J. D. Hooker 10 December [1864]
- To F. T. Buckland 11 December [1864]
- From F. T. Buckland 13 December 1864
- From Leo Lesquereux 14 December 1864
- To Daniel Oliver 15 December [1864]
- From E. A. Darwin 15 December [1864]
- To F. T. Buckland 15 December [1864]
- From Daniel Oliver 16 December 1864
- From John Lubbock 20 December 1864
- To W. B. Tegetmeier 21 December [1864]
- To John Lubbock 21 December [1864]
- From Alice Bonham-Carter to Emma Darwin 21 December [1864]
- From Emma Darwin to Elinor Mary Bonham-Carter 23 December [1864]
- To T. C. Eyton 29 December [1864?]
- From John Struthers 31 December 1864
- From E. A. Darwin [1863–6?]
- From Robert Swinhoe [before 1 October 1865?]
- From E. F. Lubbock [1 October 1866]
- From William Erasmus Darwin [late February–May 1865]
- From Francis Galton [before 28 March 1872]
- DCP-LETT-4731
- From Thomas Henry Huxley 1 January 1865
- From Henrietta Anne Huxley 1 January 1865
- From J. D. Hooker 1 January 1865
- From Henry Holland 2 January 1865
- To C. A. Bennet [before 3 January 1865]
- From Ludwig Rütimeyer 3 January 1865
- From Hugh Falconer to Erasmus Alvey Darwin 3 January 1865
- To T. H. Huxley 4 January [1865]
- From Hugh Falconer to E. A. Darwin 5 January [1865]
- To Hugh Falconer 6 January [1865]
- From W. D. Fox 6 January [1865]
- To J. D. Hooker 7 January [1865]
- From J. D. Hooker [8–18 January 1865]
- To T. C. Eyton 9 January [1865?]
- To Henry Hennessy 10 January [1868]
- To Ray Society [before 7 January 1865]
- From T. H. Huxley 15 January 1865
- From Charles Lyell 16 January 1865
- From Asa Gray 17 January 1865
- To Richard Kippist 18 January [1865]
- To Henry Denny 17 January [1865]
- To J. D. Hooker 19 January [1865]
- From J. D. Hooker [20 January 1865]
- From Alfred Russel Wallace 20 January 1865
- From John Scott 20 January 1865
- To Charles Lyell 22 January [1865]
- From Henry Denny 23 January 1865
- From J. D. Hooker [26 January 1865]
- To John Edward Gray 27 January [1865]
- From Henry Walter Bates 28 January 1865
- To Henry Denny 28 January [1865]
- To A. R. Wallace 29 January [1865]
- To Abraham Dee Bartlett 30 January [1865]
- From A. R. Wallace 31 January [1865]
- To A. R. Wallace 1 February [1865]
- From William Bernhard Tegetmeier 1 February 1864
- To J. D. Hooker 2 February [1865]
- To [Robertson Munro?] 3 February [1865 or 1866?]
- To Ray Society [14–18 January 1865]
- From J. D. Hooker 3 February 1865
- To Max Ernst Wichura 3 February [1865]
- From Maxwell Tylden Masters 7 February 1865
- To Richard Kippist 8 February 1865
- To A. D. Bartlett 9 February [1865]
- To J. D. Hooker 9 February [1865]
- From August Schleicher 9 February 1865
- To A. D. Bartlett 14 February [1865]
- To J. D. Hooker 15 [February 1865]
- From J. D. Hooker [17 February 1865]
- From George Busk 20 February 1865
- To Charles Lyell 21 February [1865]
- To William Bernhard Tegetmeier 27 February [1865]
- From J. D. Hooker [27 February 1865?]
- From Benjamin Dann Walsh 1 March 1865
- To W. B. Tegetmeier 6 [March 1865]
- From Frederick Ransome 6 March 1865
- From Frederick Ransome 9 March 1865
- From J. D. Hooker [10 March 1865]
- From Rudolph Heine 10 March 1865
- DCP-LETT-4784
- From W. B. Tegetmeier 13 March 1865
- To W. B. Tegetmeier 14 March [1865]
- To Rudolph Heine 16 March [1865]
- From W. B. Tegetmeier [28 February – 5 March 1865]
- To J. D. Hooker 16 [March 1865]
- From Francis Trevelyan Buckland 18 March 1865
- From George Stewardson Brady 19 March 1865
- To Frank Buckland 21 March [1865]
- From John Lubbock 22 and 26 March 1865
- From H. W. Bates 22 March 1865
- From Edward Perceval Wright 24 March 1865
- To E. P. Wright 26 March [1865]
- To Charles Lyell 25 March [1865]
- DCP-LETT-4795
- From W. B. Tegetmeier 27 March 1865
- To B. D. Walsh 27 March [1865]
- To W. B. Tegetmeier 28 March [1865]
- From Charles Cardale Babington 28 March 1865
- From H. W. Bates 29 March 1865
- To John Murray 31 March [1865]
- From E. P. Wright 31 March 1865
- To E. P. Wright 3 April [1865]
- From W. B. Tegetmeier [29 March – 7 April 1865]
- To W. B. Tegetmeier 6 April [1865]
- To J. D. Hooker 6 April [1865]
- To W. B. Tegetmeier [7 April 1865]
- From J. D. Hooker [7–8 April 1865]
- From W. B. Tegetmeier 10 April 1865
- To J. D. Hooker 10 [April 1865]
- From John Scott 10 April 1865
- From William Duppa Crotch 10 April 1865
- From J. D. Hooker 12 April [1865]
- To J. D. Hooker 13 April [1865]
- To John Murray 14 April [1865]
- To J. D. Hooker 17 April [1865]
- From W. B. Tegetmeier to John Murray and Robert Francis Cooke 17 April 1865
- From R. F. Cooke to W. B. Tegetmeier 18 April 1865
- From J. D. Hooker [19 April 1865]
- From Herbert Spencer 22 April 1865
- To M. T. Masters 25 April [1860]
- From Eliza Meteyard 25 April 1865
- From George Busk 28 April 1865
- DCP-LETT-4821
- To W. E. Darwin [after 14 April – 5 May 1864]
- From L. C. or Margaret Susan Wedgwood to [Emma Darwin?] [May 1865]
- From T. H. Huxley 1 May 1865
- To J. D. Hooker [1 May 1865]
- From J. D. Hooker 2 May 1865
- To J. D. Hooker 4 May [1865]
- To James Philip Mansel Weale 6 May [1865]
- To Friedrich Rolle 6 May [1865]
- To W. B. Tegetmeier 8 May [1861]
- From Bartholomew James Sulivan 8 May [1865]
- To B. J. Sulivan [9 May 1865]
- From Emma and Charles Darwin 13 May 1865
- From Asa Gray 15 and 17 May 1865
- To John Chapman 16 May [1865]
- From John Traherne Moggridge 17 May [1865]
- From J. D. Hooker [26 May 1865]
- To T. H. Huxley 27 May [1865]
- From T. H. Huxley 29 May 1865
- From B. D. Walsh 29 May 1865
- From William Allport Leighton 29 May 1865
- To T. H. Huxley 30 May [1865]
- From Edward Cresy 30 May 1865
- From Charles Kingsley 30 May 1865
- To John Higgins 31 May 1865
- From B. J. Sulivan 31 May [1865]
- From Charles Lyell to J. D. Hooker [31 May 1865]
- From T. H. Huxley 1 June 1865
- To J. D. Hooker 1 June [1865]
- From George Maw 1 June 1865
- To W. B. Tegetmeier 2 June [1865]
- From J. D. Hooker [2 June 1865]
- To John Murray 2 June [1865]
- To [Richard Kippist] 4 June [1865]
- To J. D. Hooker [4 June 1865]
- To George Maw 4 June [1865]
- To John Chapman 7 June 1865
- From J. D. Hooker [15 June 1865]
- From Edward Cresy 9 June 1865
- From Charles Kingsley 10 June 1865
- To John Lubbock 11 June [1865]
- From J. D. Hooker [after 17 June 1865]
- From John Lubbock 12 June [1865]
- From Charles Kingsley 14 June 1865
- To J. D. Hooker [17 June 1865]
- From C. V. Naudin 18 June 1865
- From W. B. Tegetmeier 20 June 1865
- From Henry Holland 25 June [1865]
- From Thomas Rivers 6 July 1865
- To B. D. Walsh 9 July [1865]
- From Charles and Emma Darwin to J. D. Hooker [10 July 1865]
- DCP-LETT-4869
- To T. H. Huxley 12 July [1865]
- From M. T. Masters 12 July 1865
- To T. H. Huxley [17 July 1865]
- From J. D. Hooker 13 July 1865
- From W. E. Darwin [14 July 1865]
- To J. D. Hooker [29 July 1865]
- From T. H. Huxley 16 July 1865
- From John Scott 21 July 1865
- From Asa Gray 24 July 1865
- To William Bowman 30 July [1865?]
- From Frances Harriet Hooker [27 January 1865]
- From John Crawfurd to E. A. Darwin 7 August 1863
- To Fritz Müller 10 August [1865]
- From Fritz Müller 12 August 1865
- From Fritz Müller [12 and 31 August, and 10 October 1865]
- To Asa Gray 15 August [1865]
- From F. H. Hooker [17 August 1865]
- To J. D. Hooker 16 August [1865]
- From E. A. Darwin 24 August [1865]
- From Fritz Müller 31 August 1865
- From M. T. Masters September 1865
- From F. H. Hooker [21 or 28 August 1865]
- From M. T. Masters [before 13 December 1877]
- From E. A. Darwin 1 September [1865]
- From F. H. Hooker 6 September [1865]
- From J. Burningham [10 September 1858?]
- From Edward Cresy 10 September 1865
- From F. H. Hooker 13 September [1865]
- From A. R. Wallace 18 September 1865
- To Fritz Müller 20 September [1865]
- To A. R. Wallace 22 September [1865]
- From Jeffries Wyman 22 September 1865
- From F. H. Hooker 22 September [1865]
- From J. D. Hooker [26 September 1865]
- From Julius von Haast 27 September 1865
- To J. D. Hooker 27 [or 28 September 1865]
- To Samuel Butler 30 September [1865]
- From W. D. Fox [before 26 October 1865]
- From Samuel Butler 1 October 1865
- From T. H. Huxley 2 October 1865
- From A. R. Wallace 2 October 1865
- To J. D. Hooker 3 October [1865]
- From Charles Shaw 3 October 1865
- To T. H. Huxley 4 October [1865]
- From J. D. Hooker 6 October 1865
- To Samuel Butler 6 October [1865]
- To Jeffries Wyman 8 October [1865]
- From Fritz Müller 10 October 1865
- To Frederic William Farrar 11 October [1865]
- To J. T. Moggridge 13 October [1865]
- From J. T. Moggridge 14 October [1865]
- To Fritz Müller 17 October [1865]
- From Hermann Kindt 17 October 1865
- From Edward Cresy 18 October 1865
- To Hermann Kindt [18–22 October 1865]
- To Asa Gray 19 October [1865]
- To Daniel Oliver 20 October [1865]
- To J. D. Hooker 22 and 28 [October 1865]
- From Daniel Oliver 23 October 1865
- From Hermann Kindt 23 October 1865
- To W. D. Fox 25–6 October [1865]
- From Alfred Newton 27 October 1865
- To Alfred Newton 29 October [1865]
- From Alfred Newton 30 October 1865
- From George Henslow 1 November 1865
- To F. W. Farrar 2 November [1865]
- From Fritz Müller 5 November 1865
- To George Henslow [2–5 November 1865]
- From Asa Gray 6 November 1865
- From George Henslow 6 November 1865
- From Richard Trevor Clarke 6 November [1866]
- From F. W. Farrar 6 November 1865
- From Ernst Haeckel 11 November 1865
- From B. D. Walsh 12 November 1865
- From Hermann Kindt 13 November 1865
- To Eliza Meteyard 16 November [1865]
- From Eliza Meteyard 17 November 1865
- From E. A. Darwin [20 November 1865?]
- From James Shaw 20 November 1865
- To Hermann Kindt 22 November 1865
- From Edward Cresy to Emma Darwin 20 November 1865
- To John Higgins 21 November 1865
- From Hermann Kindt 24 November 1865
- From E. A. Darwin to Emma Darwin 25 [November 1865]
- To James Shaw 30 November 1865
- From George Henslow 2 December 1865
- To Robert Burn 2 December [1865]
- From William Pollard Pattison 4 December 1865
- To Ernst Haeckel 6 December [1865]
- To Henry Wentworth Acland 8 December [1865]
- To Fritz Müller 9 December [1865]
- To Edward Blyth 10 December [1866]
- From Roland Trimen 13 December 1865
- To B. D. Walsh 19 December [1865]
- To J. D. Hooker 22 December [1865]
- From J. D. Hooker [23] December 1865
- From J. D. Hooker 24 December 1865
- To Julius von Haast 26 December [1865]
- From J. T. Moggridge 27 December [1865]
- From Robert Monsey Rolfe 28 December 1865
- To J. D. Hooker [31 December 1865]
- From Harriet Lubbock [April? 1866]
- To George Howard Darwin [1866]
- From W. E. Darwin [23 June 1866]
- To a local landowner [1866?]
- From Daniel Oliver [after 13 May 1866]
- From E. A. Darwin [before 20 February 1866?]
- From Charles John Robinson [1866?]
- DCP-LETT-4967
- From Emily Catherine Langton to Emma and Charles Darwin [6 and 7? January 1866]
- To Henry Bence Jones 3 January [1866]
- From John William Salter 4 January [1867]
- To Philip Lutley Sclater 6 January [1866]
- From William Bernhard Tegetmeier 8 January [1868?]
- To Fritz Müller 11 January 1866
- From Ernst Haeckel 11 January 1866
- From Jeffries Wyman 11 January 1866
- From Edward Blyth 13 [December] 1866
- To J. D. Hooker 15 [January 1866]
- To William Bernhard Tegetmeier 16 January [1866]
- To [James Samuelson?] 19 January [1866?]
- From J. D. Hooker 16 January 1866
- From W. B. Tegetmeier [after 24 January 1866]
- To Ernst Haeckel 20 January [1866]
- To J. D. Hooker 21 [January 1866]
- To Alfred Russel Wallace 22 January 1866
- From W. B. Tegetmeier 22 January [1866]
- From J. D. Hooker 23 January 1866
- From Ernst Haeckel 28 January 1866
- From Friedrich Rolle 28 January 1866
- From Frederic Ward Putnam 29 January 1866
- From William Bowman 31 January [1863]
- To A. R. Wallace [6 February 1866]
- To Ernst Haeckel 1 February 1866
- DCP-LETT-4991
- To Friedrich Rolle 1 February [1866]
- From Frederic William Farrar 1 February [1866]
- To Jeffries Wyman 2 February 1866
- To F. W. Farrar 3 February [1866]
- From Charles James Fox Bunbury to Charles Lyell 3 February 1866
- From J. D. Hooker 4 February 1866
- From A. R. Wallace 4 February 1866
- From F. W. Farrar 5 February 1866
- To Charles Lyell 7 February [1866]
- From Lionel Smith Beale 9 February 1866
- To Gardeners’ Chronicle [before 10 February 1866]
- To Williams & Norgate 10 February [1866]
- From H. B. Jones 10 February [1866]
- From James Shaw [6–10 February 1866]
- To James Shaw 11 February [1866]
- From Fritz Müller 13 February 1866
- From James Shaw 14 February 1866
- To James Shaw [23 April 1866]
- To Charles Lyell 15 February [1866]
- From Cuthbert Collingwood 15 February 1866
- From John Traherne Moggridge 15 February [1866]
- To Cuthbert Collingwood 16 February [1866]
- From Erasmus Alvey Darwin 17 February [1866]
- From E. A. Darwin 19 February [1866]
- From Cuthbert Collingwood 20 February 1866
- From C. J. F. Bunbury to Charles Lyell 20 February 1866
- To Robert Caspary 21 February [1866]
- From J. D. Hooker 21 February 1866
- From John Murray 21 February [1866]
- To Charles Lyell 22 February [1866]
- To John Murray 22 February [1866]
- From J. D. Hooker [26 or 27 February 1866]
- DCP-LETT-5017A
- From Robert Caspary 25 February 1866
- To John William Salter 28 February [1862]
- To J. D. Hooker [28 February 1866]
- From John Edward Gray 28 February 1866
- From W. E. Darwin [1 December 1866]
- From Maxwell Tylden Masters March 1866
- From Frederick Smith March 1866
- From Charles Lyell 1 March 1866
- To Charles Lyell [3 March 1866]
- To Robert Caspary 4 March 1866
- From Charles Lyell 5 March 1866
- From Fritz Müller 6 March 1866
- To Charles Lyell 8 March [1866]
- From George Henslow 8 March 1866
- To William Bowman 10 March [1863]
- From Charles Lyell 10 March 1866
- To Charles Lyell 12 [March 1860]
- From George Henslow 12 March 1866
- From Benjamin Dann Walsh 13 March 1866
- From Rudolf Suchsland 16 March 1866
- From George Henslow 17 March [1866]
- From George Henslow [18–30 March 1866]
- From E. Schweizerbart’sche Verlagsbuchhandlung 23 March 1866
- To Robert McLachlan 23 March [1866]
- From Albert Müller 28 March 1866
- To Albert Müller 28 March [1866]
- From Robert Swinhoe 28 March 1866
- To Richard Kippist 31 March [1866]
- From Albert Müller 31 March 1866
- From George Henslow [after 19 April 1866]
- From Rudolf Suchsland 2 April 1866
- To J. D. Hooker 4 April [1866]
- From J. D. Hooker [6 April 1866]
- From George Henslow 7 April 1866
- From James Samuelson 8 April 1866
- To Fritz Müller [9 and] 15 April [1866]
- To J. D. Hooker [9 April 1866]
- From J. E. Gray 9 April 1866
- From E. A. Darwin 10 April [1866]
- From William Reeves 10 April 1866
- To J. D. Hooker [5 April 1866]
- To Rudolf Suchsland 4 April 1866
- From Friedrich Rolle 12 April 1866
- From J. E. Gray 13 April 1866
- To Asa Gray 16 April [1866]
- To Rudolf Suchsland 21 April [1866]
- To George Henslow 16 April [1866]
- From Rudolf Suchsland 16 April 1866
- To George Henslow [before 19 April 1866]
- From James Shaw 19 April 1866
- To B. D. Walsh [19] April [1866]
- From M. T. Masters 20 April 1866
- To Friedrich Hildebrand 20 April [1866]
- To Friedrich Rolle 21 April 1866
- To J. D. Hooker [22 April 1866]
- To H. B. Jones [23 April 1866?]
- From Charles Wentworth Dilke 24 April 1866
- To H. W. Bates 20 April [1876]
- From Robert Caspary 26 April 1866
- From William Robert Grove 26 April 1866
- To W. R. Grove [26 April 1866]
- To Thomas Rivers 27 April [1866]
- To J. D. Hooker [28 April 1866]
- To William Robinson [29 April 1866]
- To J. D. Hooker [16 April 1866]
- To Henrietta Emma Darwin [14–21 April 1866]
- From H. E. Darwin [c. 10 May 1866]
- To [John Gould?] [before 10 May 1866?]
- From J. D. Hooker [after 28 April 1866]
- From J. D. Hooker [19 March 1866]
- From H. C. Watson to J. D. Hooker 1 January 186[8]
- From J. D. Hooker to Emma Darwin [21 March 1866]
- To Julius von Haast 5 May [1866]
- To William Robinson 5 May [1866]
- To William Lonsdale 6 May [1864]
- From Asa Gray 7 May 1866
- From Robert Caspary 7 May 1866
- To ? 10 May [1866?]
- From J. T. Moggridge 10 May [1866]
- From E. Schweizerbart’sche Verlagsbuchhandlung 10 May 1866
- From John Gould 10 May 1866
- From Friedrich Hildebrand 11 May 1866
- To J. D. Hooker [12 May 1866]
- From J. D. Hooker 13 May 1866
- From G. J. MacCarthy to G. H. K. Thwaites 13 May [1862]
- To William Ewart Gladstone 14 May 1866
- To John Higgins 14 May 1866
- To J. D. Hooker 16 May [1866]
- To Friedrich Hildebrand 16 May [1866]
- From J. D. Hooker [17 May 1866]
- From Thomas Rivers 17 May 1866
- From George Henslow 18 May 1866
- From J. T. Moggridge 21 May [1866]
- To Fritz Müller 23 May 1866
- To Japetus Steenstrup 23 May [1874 or 1875?]
- From John Murray 25 May [1866]
- From Robert Caspary 25 May 1866
- From J. T. Moggridge 25 May [1866]
- From Thomas Rivers 20 May 1866
- To John Murray 28 May [1866]
- From J. D. Hooker 29 May 1866
- From John Murray 30 May [1866]
- To J. D. Hooker 31 May [1866]
- To J. D. Hooker [31 May 1866]
- From William Erasmus Darwin [7 May – 11 June 1866]
- From W. E. Darwin [18 June 1866]
- From J. D. Hooker [2 June 1866]
- From Alphonse de Candolle 3 June 1866
- To J. D. Hooker [4 June 1866]
- To William Turner 5 June [1866]
- From Thomas Rivers 6 June 1866
- To Thomas Rivers 8 June [1866]
- From Daniel Oliver 9 June 1866
- From George Henslow 11 June [1866]
- To George Henslow 12 June [1866]
- To Carl Wilhelm von Nägeli 12 June [1866]
- From George Henslow [13 or 14 June 1866]
- From J. T. Moggridge 14 June [1866]
- To J. H. Balfour 15 June [1862?]
- To Andrew Crombie Ramsay 15 June [1866]
- To George Henslow 15 [June 1866]
- From George Maw 18 June 1866
- To W. E. Darwin 19 [June 1866]
- From George Henslow 19 June 1866
- To William Erasmus Darwin [1 May 1864]
- From W. E. Darwin 20 June [1866]
- From W. E. Darwin 21 June [1866]
- To George Maw 21 June [1866]
- To W. E. Darwin 22 June [1866]
- To W. E. Darwin [24 June 1866]
- From Bartholomew James Sulivan 27 June 1866
- From W. E. Darwin 29 June [1866]
- To J. D. Hooker 30 June [1866]
- To W. E. Darwin 30 [June 1866]
- From W. E. Darwin [26–8 June 1866]
- To George Bentham [July–September 1866]
- From John Lubbock 1 July [1866]
- From J. D. Hooker 2 July 1866
- From A. R. Wallace 2 July 1866
- From Asa Gray 3 July 1866
- To the Lords of the Admiralty [2–4 July 1866]
- From W. B. Tegetmeier 4 July 1866
- To Thomas Henry Huxley 4 July [1866]
- To A. R. Wallace 5 July [1866]
- From Frederick Currey 5 July 1866
- From J. T. Moggridge 5 and 6 July [1866]
- To Frederick Ransome [6 February 1866]
- From T. H. Huxley 6 July 1866
- From Frederick Ransome 7 February 1866
- From George Stacey Gibson 7 July 1866
- To W. B. Tegetmeier 9 July [1866]
- From Frederick Ransome 10 February 1866
- From Charles Kingsley 12 July 1866
- To John Murray 15 July [1866]
- To Charles Kingsley 15 July [1866]
- From Searles Valentine Wood 16 July 1866
- From Alfred Hanson 17 July 1866
- From Julius von Haast 17 July 1866
- From B. D. Walsh 17 July 1866
- From Asa Gray 18 July 1866
- From John Murray 18 July [1866]
- To J. D. Hooker 21 [July 1866]
- To Christian Gottfried Ehrenberg 22 July [1866?]
- To Friedrich Hildebrand 22 July [1866]
- From John Murray 23 July [1866]
- From J. D. Hooker [24 July 1866]
- From Friedrich Hildebrand 24 July 1866
- To J. D. Hooker 30 July [1866]
- From J. D. Hooker 31 July 1866
- To Casimir de Candolle 1 August [1866]
- To ? 2 August [1866]
- From W. B. Tegetmeier 2 August 1866
- To John Lubbock 2 August [1866]
- From Fritz Müller 2 August 1866
- To J. D. Hooker 3 and 4 August [1866]
- From J. T. Moggridge 3 August [1866]
- To W. B. Tegetmeier 4 August [1866]
- To Asa Gray 4 August [1866]
- From J. D. Hooker 4 August 1866
- From John Lubbock 4 August 1866
- From W. B. Tegetmeier [after 4 August 1866]
- To J. D. Hooker 5 August [1866]
- From J. D. Hooker [6 August 1866]
- From J. D. Hooker 7 August 1866
- From Asa Gray 7 August 1866
- To J. D. Hooker 8 August [1866]
- From W. E. Darwin 8 and 9 August [1866]
- From J. D. Hooker 9 August 1866
- To W. B. Tegetmeier 10 August [1866]
- To Gardeners’ Chronicle [before 11 August 1866]
- To Gardeners’ Chronicle [before 11 August 1866]
- To J. D. Hooker 12 August [1866]
- From J. D. Hooker [17 August 1866]
- From J. D. Hooker 18 August 1866
- To Ernst Haeckel 18 August [1866]
- To B. D. Walsh 20 August [1866]
- From W. D. Fox 20 August [1866]
- To Fritz Müller 23 August [1866]
- To W. D. Fox 24 August [1866]
- From Asa Gray 27 August 1866
- From J. D. Hooker [28 August] 1866
- To J. D. Hooker 30 August [1866]
- From W. R. Grove 31 August 1866
- To Robert Swinhoe [September 1866]
- To Lucy Caroline Wedgwood [before 25 September 1866]
- From Ellen Frances Lubbock to H. E. Darwin [28 July? 1866]
- From John Brodie Innes 1 September [1867]
- From J. D. Hooker [4 September 1866]
- From Julius von Haast 8 September 1866
- To Charles Lyell 8[–9] September [1866]
- From W. R. Grove 9 September 1866
- To Asa Gray 10 September [1866]
- From W. B. Tegetmeier 12 September 1866
- To W. B. Tegetmeier 14 September [1866]
- To Albert Gaudry 17 September [1866]
- From J. D. Hooker 19 September 1866
- From George Warde Norman 20 September 1866
- To Fritz Müller 25 September [1866]
- To J. D. Hooker 25 September [1866]
- From George Bentham 25 September 1866
- To William Bowman 26 September [1866]
- To George Bentham 27 September [1866]
- From Thomas Francis Jamieson 27 September 1866
- From J. D. Hooker 28 September 1866
- From Francis Trevelyan Buckland 29 September 1866
- To Ernst Haeckel [20 October 1866]
- To George Bentham 1 October 1866
- From Fritz Müller 1 and 3 October 1866
- To J. D. Hooker 2 October [1866]
- To F. T. Buckland 2 October 1866
- To J. D. Hooker [4 October 1866]
- From F. T. Buckland 4 October [1866]
- From E. A. Darwin 4 October [1866]
- From George Bentham 4 October [1866]
- From William Bowman 5 October 1866
- From E. A. Darwin 7 October [1866]
- From Charles Pritchard 8 October 1866
- From Thomas Rivers 8 October 1866
- To Charles Lyell 9 October [1866]
- From Asa Gray 10 October 1866
- From E. A. Darwin 11 October [1866]
- To Charles Lyell 12 October [1866]
- To Charles Pritchard 12 October [1866]
- To Land and Water [2 October 1866]
- To Thomas Rivers 13 October [1866]
- From Thomas Rivers 14 October 1866
- From W. B. Tegetmeier 15 October 1866
- To W. B. Tegetmeier 16 October [1866]
- To John Murray 16 October [1866]
- From John Murray 18 October [1866]
- From J. D. Hooker 19 October 1866
- From Ernst Haeckel 19 October 1866
- To Mary Elizabeth Lyell [19? October 1866]
- To George Brettingham Sowerby Jr 19 October [1866]
- To J. H. Balfour 21 October [1864]
- From John Lubbock [21 October 1866]
- To John Murray 23 October [1866]
- From Friedrich Hildebrand 23 October 1866
- From John Murray 25 October [1866]
- From E. Schweizerbart’sche Verlagsbuchhandlung 26 October 1866
- To J. D. Hooker [21 October 1866]
- From Rudolf Oldenbourg 28 October 1866
- From Mary Somerville 30 October 1866
- To Thomas Laxton 31 October [1866]
- To Fritz Müller [before 10 December 1866]
- To J. D. Hooker 1 November [1866]
- From Frances Harriet Hooker 1 November [1866]
- From Fritz Müller [2 November 1866]
- From Herbert Spencer 2 November 1866
- From J. D. Hooker 3 November 1866
- To Thomas Laxton 3 November [1866]
- From Asa Gray 6 November [1866]
- From Julius Victor Carus 7 November 1866
- From James Shaw 7 November 1866
- To W. E. Darwin 8 November [1866]
- From J. T. Moggridge 9 November [1866]
- To J. V. Carus 10 November 1866
- From W. E. Darwin 10 November [1866]
- From Armand de Quatrefages 10 November 1866
- From T. H. Huxley 11 November 1866
- From Clair James Grece 12 November 1866
- To J. T. Moggridge 13 November [1866]
- To John Lubbock 15 November 1866
- From J. V. Carus 15 November 1866
- To John Higgins [16 November 1866]
- From A. R. Wallace 19 November 1866
- To J. D. Hooker 20 November [1866]
- To J. V. Carus 21 November 1866
- From J. D. Hooker [22 November 1866]
- To J. D. Hooker [23 November 1866]
- To James Shaw 24 November [1866]
- From Alfred Newton 27 November 1866
- From Anne Marsh-Caldwell 27 November [1866]
- From Herbert George Henry Norman 30 November 1866
- To H. G. H. Norman [after 30 November 1866]
- From J. D. Hooker [December 1866?]
- To Charles Lyell 1 December [1866]
- To Anne Marsh-Caldwell 1 December [1866]
- From Daniel Hanbury 1 December 1866
- To Edouard Bornet 1 December 1866
- From Fritz Müller 1 December 1866
- To W. B. Tegetmeier 4 December [1866]
- From J. D. Hooker 4 December 1866
- To J. D. Hooker 5 December [1866]
- From Thomas Gold Appleton 5 December [1865]
- To Linnean Society 7 December [1866]
- To Miss Behrens 7 December 1866
- From Robert Monsey Rolfe 8 December 1866
- From W. B. Tegetmeier 10 December [1866]
- To J. D. Hooker 10 December [1866]
- To W. B. Tegetmeier 12 December [1866]
- From J. D. Hooker [12 December 1866]
- From Mary Everest Boole 13 December 1866
- From Eleanor Corbet 13 December 1866
- From J. D. Hooker 14 December 1866
- To William Turner 14 December [1866]
- To M. E. Boole 14 December 1866
- DCP-LETT-5308
- From W. B. Tegetmeier 15 December [1866]
- To Charles Lovegrove? 16 December [1866?]
- From M. E. Boole 17 December [1866]
- To ? 17 December [1866]
- To W. B. Tegetmeier 18 [December 1866]
- To Henry Walter Bates 18 December [1866]
- From H. W. Bates 19 December 1866
- From George Brown [before 1868]
- To James Paget 19 December [1858]
- To John Murray 21 and 22 December [1866]
- To T. H. Huxley 22 December [1866]
- From Lydia Ernestine Becker 22 December 1866
- From John Murray 22 December [1866]
- To P. L. Sclater 24 December [1866]
- From B. D. Walsh [28 November 1866]
- To B. D. Walsh 24 December [1866]
- To J. D. Hooker 24 December [1866]
- From John Murray 24 December [1866]
- To William Turner 24 [December 1866]
- From J. D. Hooker 25 December 1866
- From B. J. Sulivan 25 December 1866
- To J. D. Hooker 28 [December 1866]
- From L. E. Becker 28 December [1866]
- From J. D. Hooker [29 December 1866]
- From John William Salter 31 December 1866
- To B. J. Sulivan 31 December [1866]
- To Fritz Müller [late December 1866 and] 1 January 1867
- From Mary Lubbock to H. E. Darwin [8 May 1866 – 31 August 1871]
- To W. E. Darwin [19 May 1864]
- From E. A. Darwin to Emma Darwin [before 19 November 1867]
- From Erasmus Alvey Darwin to Emma Darwin [before 3 February 1867?]
- From George Henslow [c. August 1867?]
- From Edward Blyth [2–30 March 1867]
- From William Bowman [before 25 January 1872]
- From Clémence Auguste Royer [April–June 1865]
- From William Blenkiron Jr [c. February 1868?]
- To Charles Henry Middleton 20 [1867?]
- From E. A. Darwin 22 [March 1867]
- From Thomas Henry Huxley [before 7 January 1867]
- To Athenæum 1 January 1867
- DCP-LETT-5344
- From Fritz Müller 1 January 1867
- From John Murray 2 January [1867]
- To John Murray 3 January [1867]
- To William Bernhard Tegetmeier 6 January [1867]
- To T. H. Huxley 7 January [1867]
- To Ernst Haeckel 8 January 1867
- To John Murray 8 January [1867]
- From John Scott 8 January [1868]
- To John Scott [after 8 January 1868]
- To J. D. Hooker 9 January [1867]
- From John Murray 9 January [1867]
- From James Philip Mansel Weale 9 January 1867
- To John Murray 10 January [1867]
- From Bartholomew James Sulivan 11 January 1867
- From J. D. Hooker [12 January 1867]
- From Thomas Belt 12 January 1867
- From Robert Monsey Rolfe 14 January 1867
- To J. D. Hooker 15 January [1867]
- To William Turner 15 January [1867]
- To John Murray 15 January [1867]
- To Thomas Belt 15 January [1867]
- To B. J. Sulivan 15 January [1867]
- From John Lubbock 16 January 1867
- To John Lubbock 17 January [1867]
- DCP-LETT-5368
- From E. A. Darwin 17 [July 1867]
- From Julius Victor Carus 18 January 1867
- To Alfred Newton 19 January [1867]
- From J. D. Hooker 20 January 1867
- To J. D. Hooker 21 January [1867]
- From Alfred Newton 21 January 1867
- To J. V. Carus 22 January [1867]
- From John Scott 22 January 1867
- To Alfred Newton 23 January [1867]
- To J. D. Hooker [23 January 1867]
- From E. Schweizerbart’sche Verlagsbuchhandlung 24 January 1867
- From Alexander F. Boardman 26 January 1867
- To John Murray 27 January [1867]
- From John Murray 28 January [1867]
- To J. D. Hooker 29 January [1867]
- To John Murray 29 January [1867]
- From John Murray 30 January [1867]
- To John Murray 31 January [1867]
- To Stephen Paul Engleheart? [April 1867?]
- To William Turner 1 February [1867]
- From D. Appleton & Co. to Asa Gray 1 February 1867
- From W. D. Fox 1 February [1867]
- To W. B. Tegetmeier 2 February [1864]
- From Fritz Müller 2 February 1867
- From J. D. Hooker 4 February 1867
- From Lydia Ernestine Becker 6 February 1867
- To W. D. Fox 6 February [1867]
- To Fritz Müller 7 February [1867]
- From William Henry Kinnaird Gibbons 7 February 1867
- To J. D. Hooker 8 February [1867]
- From William Turner 8 February 1867
- From J. V. Carus 11 February 1867
- To William Turner 11 February [1867]
- From J. D. Hooker 12 February 1867
- From John Lubbock 12 February 1867
- To A. D. Bartlett 16 February [1868]
- To William Benjamin Carpenter [13–16 February 1867]
- To J. V. Carus 17 February [1867]
- To A. R. Wallace [24 June 1867]
- From Edward Blyth 19 February 1867
- To Edward Blyth [18 February 1867]
- To Edward Blyth [19 February 1867]
- To T. H. Huxley 21 February [1868]
- To J. P. M. Weale 22 February [1867]
- To Fritz Müller 22 February [1867]
- To the Linnean Society 22 February [1867]
- To King’s College, London 22 February [1867]
- To Edward Blyth 23 February [1867]
- To Paul Rohrbach 23 February [1867]
- To Alfred Russel Wallace 23 February 1867
- From A. R. Wallace 24 February [1867]
- From John Murray 24 February [1866]
- From Edward Blyth 24 February 1867
- To Ladies 24 February [1862–9]
- From Benjamin Dann Walsh [25 February 1867]
- To A. R. Wallace 26 February [1867]
- From Trübner & Co 26 February 1867
- To J. P. M. Weale 27 February [1867]
- To Julius von Haast 27 February [1867]
- To Robert Swinhoe [27 February 1867]
- To Ferdinand von Mueller 28 February [1867]
- To E. Schweizerbart’sche Verlagsbuchhandlung [19 March 1867]
- From Alfred Newton 1 March 1867
- To Thomas Gold Appleton 2 March [1866]
- From E. A. Darwin 3 March 1867
- From Fritz Müller 4 March 1867
- To Alfred Newton 4 March [1867]
- To W. B. Tegetmeier 5 March [1867]
- To Frederic William Farrar 5 March 1867
- From John Traherne Moggridge 6 March [1867]
- From F. W. Farrar 7 March [1867]
- From Francis Trevelyan Buckland 9 March 1867
- To James Paget 11 March [1863]
- From A. R. Wallace 11 March [1867]
- From Henry Walter Bates 11 March 1867
- From Benjamin Clarke 12 March 1867
- To A. R. Wallace [12–17] March [1867]
- From J. D. Hooker 14 March 1867
- To Asa Gray 15 April [1867]
- From Vladimir Onufrievich Kovalevsky 15 March 1867
- From J. T. Moggridge 15 March [1867]
- To George Moultrie Salt 16 March [1867]
- To J. D. Hooker 17 March [1867]
- To John Murray 18 March [1867]
- From Friedrich Hildebrand 18 March 1867
- From John Murray 19 March [1867]
- From J. D. Hooker 20 March 1867
- To John Murray 20 March [1867]
- To Friedrich Hildebrand 20 March [1867]
- To J. D. Hooker 21 March [1867]
- From V. O. Kovalevsky 2 April 1867
- To [?] 22 [March? 1867]
- From E. Schweizerbart’sche Verlagsbuchhandlung 22 March 1867
- From Alexander Shaw to E. A. Darwin 22 March 1867
- To B. D. Walsh 23 March [1867]
- From J. D. Hooker 23 March 1867
- From Hermann Müller 23 March 1867
- To J. D. Hooker 24 [March 1867]
- To Fritz Müller 25 March [1867]
- From John Lubbock 25 March 1867
- From Benjamin Clarke 25 March 1867
- From W. E. Darwin 26 March [1867]
- From J. D. Hooker 26 [and 27] March 1867
- To E. Schweizerbart’sche Verlagsbuchhandlung 27 March [1867]
- From Asa Gray 26 March 1867
- To John Lubbock 26 March [1867]
- To V. O. Kovalevsky 26 March [1867]
- From Andrew Smith 26 March 1867
- To William Erasmus Darwin 27 [March 1867]
- From Maxwell Tylden Masters 28 March 1867
- To M. T. Masters [28 March – 5 April 1867]
- To J. D. Hooker 29 [March 1867]
- To William Ogle 29 March [1867]
- To Hermann Müller 29 March [1867]
- From John Lubbock 29 March 1867
- From W. B. Tegetmeier 29 March 1867
- From H. W. Bates 29 March 1867
- To W. B. Tegetmeier 30 March [1867]
- From C. W. Nägeli 31 March 1867
- To H. W. Bates 30 March [1867]
- From J. D. Hooker 31 March 1867
- From Joseph Trimble Rothrock to Asa Gray 31 March 1867
- DCP-LETT-5478F
- From George Gibbs 31 March 1867
- From Fritz Müller 1 April 1867
- From Hermann Müller 1 April [1867]
- From Kent Church Penitentiary Society [before 21 February 1866]
- From John Murray 2 April [1867]
- To Benjamin Dann Walsh 3 April [1869]
- From J. D. Hooker 3 April 1867
- From Isaac Anderson-Henry 3 April 1867
- To J. D. Hooker 4 April [1867]
- To John Murray 4 April [1867]
- To Thomas Blunt 5 April [1867]
- To J. D. Hooker 5 April [1867]
- From J. V. Carus 5 April 1867
- From Robert Trail 5 April 1867
- DCP-LETT-5491
- From Frances Harriet Hooker [6 April 1867]
- From J. D. Hooker [to W. E. Darwin?] [13 April? 1867]
- From Daniel Oliver 8 April 1867
- From Carl Vogt 8 April 1867
- To Carl Wilhelm von Nägeli [after 8 April 1867]
- To John Murray 10 April [1867]
- To J. V. Carus 11 April [1867]
- To Carl Vogt 12 April [1867]
- To Ernst Haeckel 12 April [1867]
- From J. D. Hooker 13 April 1867
- To J. D. Hooker 15 [April 1867]
- From J. V. Carus 15 April 1867
- From John Murray 17 April [1867]
- From Carl Vogt 17 April 1867
- To J. V. Carus 18 April [1867]
- To W. B. Tegetmeier 20 April [1867]
- To Edward Walford 22 [January–April 1865?]
- To Fritz Müller 22 April [1867]
- From Francis Parker 22 April 1867
- From J. T. Moggridge 22 April [1867]
- From Carl Vogt 23 April 1867
- From V. O. Kovalevsky 24 April [1867]
- To J. D. Hooker 25 [April 1867]
- From A. R. Wallace 26 April [1867]
- From Thomas Rivers 26 April 1867
- To A. R. Wallace 29 April [1867]
- From Charles Loring Brace 29 April 1867
- From Peter S. Robertson 30 April 1867
- To Charles Kingsley 30 April [1867]
- From Charles-Ferdinand Reinwald [May 1867]
- From A. R. Wallace 1 May 1867
- To V. O. Kovalevsky 2 May [1867]
- To Robert Hunt 3 May [1866]
- From Jean Jacques Moulinié 3 May 1867
- From John Maurice Herbert 3 May 1867
- To Ludwig Rütimeyer 4 May [1867]
- To A. R. Wallace 5 May [1867]
- To J. M. Herbert 7 May [1867]
- From Nicholas Trübner 7 May 1867
- To V. O. Kovalevsky 16 May [1867]
- To J. D. Hooker [12] May [1867]
- From Ernst Haeckel 12 May 1867
- From Julius von Haast 12 May – 2 June 1867
- From J. W. Salter 14 May 1867
- From V. O. Kovalevsky 14 May 1867
- From V. O. Kovalevsky 15 May 1867
- From V. O. Kovalevsky [after 24? May 1867]
- From J. D. Hooker 17 May 1867
- From Camille Dareste 19 May 1867
- To V. O. Kovalevsky 20 May [1867]
- From Isaac Anderson-Henry 20 May 1867
- To J. D. Hooker [21 May 1867]
- To Ernst Haeckel 21 May [1867]
- To Isaac Anderson-Henry 22 May [1867]
- From Albert Gaudry 22 May 1867
- To Camille Dareste 23 May 1867
- To John Higgins 23 May 1867
- From J. D. Hooker 24 May 1867
- From Isaac Anderson-Henry 24 May 1867
- From Isaac Anderson-Henry 25 May 1867
- To Fritz Müller 26 May [1867]
- To J. D. Hooker 26 [May 1867]
- To George Howard Darwin 27 May [1867]
- To Albert Gaudry 27 May [1867]
- From Tendler & Co. to John Murray 29 May 1867
- From J. T. Moggridge 29 May [1867]
- From Francis Darwin [before 22 August 1872]
- From Frederick F. Geach June 1867
- To Charles Lyell 1 June [1867]
- From Fritz Müller 2 June 1867
- From J. J. Moulinié 2 June 1867
- From G. H. Darwin [3 June 1867]
- To V. O. Kovalevsky 3 June [1867]
- To Arthur Rawson 6 June [1863]
- From Edward Cresy 6 June 1867
- From Charles Kingsley 6 June 1867
- To Charles Lyell 9 June [1867]
- To Charles Kingsley 10 June [1867]
- To T. H. Huxley 12 June [1867]
- To Charles Lyell 12 June 1867
- To J. D. Hooker [16 June 1867]
- From J. D. Hooker 18 June 1867
- From J. W. Salter 18 June 1867
- To J. W. Salter 19 [June 1867]
- From Louisa Frances Kempson to Emma Darwin 20 June 1867
- DCP-LETT-5573
- To J. D. Hooker [23 June 1867]
- To V. O. Kovalevsky 24 June [1867]
- From Ernst Haeckel 28 June 1867
- To August Kanitz 3 July [1867]
- From J. D. Hooker 4 July 1867
- To Ernst Haeckel 4 July [1867]
- To A. R. Wallace 6 July [1867]
- From Asa Gray to J. D. Hooker [after 6 July 1867]
- From J. P. M. Weale 7 July 1867
- From James Paget 9 July 1867
- From Charles Lyell 16 July 1867
- From Salt & Sons 17 July 1867
- From Fritz Müller 17 July 1867
- To Charles Lyell 18 July [1867]
- To Henrietta Emma Darwin 26 July [1867]
- From J. D. Hooker [27 July 1867]
- To J. D. Hooker 29 July [1867]
- From J. D. Hooker 30 July [1867]
- To William Bowman 30 July [1867]
- From Hermann Julius Meyer 30 July 1867
- To Fritz Müller 31 July [1867]
- From Edouard Bornet [before 20 August 1867]
- To W. B. Tegetmeier 4 August [1867]
- To John Murray 4 August [1867]
- From Charles Lyell 4 August 1867
- From William Bowman 5 August 1867
- From John Murray 5 August [1867]
- From Robert Swinhoe 5 August 1867
- To John Murray 6 August [1867]
- To Carl Vogt 7 August [1867]
- To William Bowman 7 August [1867]
- From Seth Sutton 8 August 1867
- To Asa Gray 8 August [1867]
- To B. D. Walsh 9 August [1867]
- From Andrew Murray 12 August 1867
- To Fritz Müller 15 August [1867]
- From George Henslow 15 August 1867
- From B. J. Sulivan 16 August [1867]
- To Hermann Müller 16 August [1867]
- From J. D. Hooker 17 August 1867
- From William Angus Knight 20 August 1867
- To Edouard Bornet 20 August [1867]
- To Charles Lyell 22 August [1867]
- From J. T. Rothrock to Asa Gray 22 August 1867
- From William Boyd Dawkins 22 August 1867
- To W. A. Knight 22 August [1867]
- To Cassell, Petter, & Galpin 24 August [1867]
- From Thomas Wright 24 August 1867
- To W. B. Dawkins 26 August [1867]
- To J. P. M. Weale 27 August [1867]
- From W. B. Dawkins 27 August 1867
- To W. B. Dawkins 30 [August 1867]
- From J. D. Hooker 31 August 1867
- From F. A. Hagenauer to Ferdinand von Mueller [12 September 1867]
- From Fritz Müller [8 October 1867]
- To Hermann Müller [9 October 1867]
- To J. D. Hooker 2 September [1867]
- From Federico Delpino 5 September 1867
- From W. B. Dawkins 7 September 1867
- From Thomas Rivers 9 September 1867
- From J. V. Carus 11 September 1867
- From Ferdinand von Mueller 8 October 1867
- From J. D. Hooker [14 September 1867]
- To J. V. Carus 16 September 1867
- From Andrew Murray 16 September 1867
- From John Murray 19 September [1867]
- From J. D. Hooker [20 September 1867]
- To John Murray 20 September 1867
- From John Murray 23 September [1867]
- From John Scott 24 September 1867
- To John Murray [24 September – 31 October 1867]
- From A. R. Wallace [19 June 1867]
- From John Lubbock 28 September [1867]
- From Asa Gray [after 17 September 1867]
- From W. E. Darwin to Emma Darwin [after 30 September 1867]
- From A. R. Wallace 1 October [1867]
- To J. T. Moggridge 1 October [1867]
- From Henry Bence Jones to Emma Darwin 1 October [1867]
- To Charles Lyell 4 October [1867]
- From J. V. Carus 5 October 1867
- To George Warington 7 October [1867]
- From J. V. Carus 7 October 1867
- To J. V. Carus 8 October [1867]
- To J. V. Carus 10 October [1867]
- From J. J. Moulinié 11 October 1867
- To George Warington 11 October [1867]
- To James Samuelson 12 October [1867]
- To A. R. Wallace 12 and 13 October [1867]
- To Asa Gray 16 October [1867]
- From J. V. Carus 16 October 1867
- From J. D. Hooker 18 October 1867
- From William Houghton 18 October 1867
- To J. V. Carus 19 October [1867]
- To John Murray 19 October [1867]
- From Joseph Plimsoll 21 October 1867
- From A. R. Wallace 22 October [1867]
- From Hermann Müller 23 October 1867
- From J. V. Carus 30 October 1867
- To Charles Lyell 31 October [1867]
- To Alfred Wrigley [September 1867]
- From John Murray 1 November [1867]
- From Benjamin Clarke 1 November [1870]
- From Henry Napier Bruce Erskine to Frances Julia Wedgwood 1 November 1867
- From Charles Kingsley 1 November 1867
- DCP-LETT-5665
- To Fritz Müller 2 November 1867
- To John Murray 2 November [1867]
- From Isaac Anderson-Henry 2 November 1867
- To J. V. Carus 4 November [1867]
- From William Sweetland Dallas 4 November 1867
- To Charles Kingsley 6 November [1867]
- To W. S. Dallas 8 November [1867]
- From Edward Wilson 8 November 1867
- From Charles Kingsley 8 November 1867
- From Francis Elliott Kitchener 9 November 1867
- From W. S. Dallas 10 November 1867
- From J. V. Carus 11 November 1867
- From Samuel Wilson to Ferdinand von Mueller 12 November 1867
- To J. V. Carus 14 November [1867]
- From C. L. Brace 14 November 1867
- To J. D. Hooker 17 November [1867]
- From Isabella Elinor Aylmer 18 November 1867
- From Asa Gray 18 November 1867
- From W. E. Darwin 19 November 1867
- From J. D. Hooker 19 November 1867
- DCP-LETT-5684
- To W. E. Darwin 20 November [1867]
- From Samuel James Augustus Salter 20 November 1867
- From Edward Cresy 20 November 1867
- From R. M. Rolfe 20 November 1867
- From W. S. Dallas 20 November 1867
- From Joseph Plimsoll 21 November 1867
- From Karl von Scherzer 21 November 1867
- From John Edward Gray 21 November 1867
- From W. E. Darwin 22 November [1867]
- To J. J. Moulinié 22 November [1867]
- To E. Schweizerbart’sche Verlagsbuchhandlung 22 November [1867]
- DCP-LETT-5695
- To J. D. Hooker 25 November [1867]
- From J. J. Moulinié 25 November 1867
- To Anton Dohrn 26 November [1867]
- To J. J. Moulinié 30 November [1867]
- From Henry James Slack 30 November 1867
- From Anton Dohrn 30 November 1867
- To Hardwicke’s Science-Gossip [before 1 December 1867]
- From Daniel Mackintosh 1 December 1867
- To H. J. Slack 2 December [1867]
- From Joseph Plimsoll 3 December 1867
- From Julius von Haast 4 December 1867
- From I. E. Aylmer 5 December 1867
- From Thomas Woolner 6 December 1867
- To Charles Lyell 7 December [1867]
- From Edward Wilson 7 December 1867
- To Albert Charles Lewis Gotthilf Günther 7 December [1867]
- From Daniel Mackintosh 8 December [1867]
- From W. S. Dallas 8 December 1867
- To Philip Lutley Sclater 9 December [1867]
- To J. P. M. Weale 9 December [1867]
- To the Linnean Society 9 December [1867]
- From John Lubbock 9 December [1867]
- To Herbert Spencer 9 December [1867]
- From Francis Walker 9 December 1867
- To Abraham Dee Bartlett 9 December [1867]
- From A. D. Bartlett 9 December 1867
- To St George Jackson Mivart 9 December [1867]
- To J. V. Carus 10 December [1867]
- From J. P. M. Weale [10 December 1867]
- From W. S. Dallas 10 December 1867
- From J. D. Hooker to Emma Darwin 11 December 1867
- From W. S. Dallas 11 December 1867
- From Eduard Koch 11 December 1867
- To Eduard Koch 13 December [1867]
- From Andrew Murray 13 December 1867
- To Charles Kingsley 13 December [1867]
- From J. D. Hooker 14 [January] 1869
- From Charles Kingsley 11 December 1867
- From J. D. Hooker 17 December 1867
- From Joseph Plimsoll 17 December 1867
- From A. C. L. G. Günther 19 December 1867
- From A. C. L. G. Günther [late December 1867 or early January 1868]
- To A. C. L. G. Günther 21 December [1867]
- From Henry Holland 21 December [1867]
- From Frederick Du Cane Godman 21 December [1867]
- From J. D. Hooker [23 December 1867?]
- To F. Du C. Godman 23 December [1867]
- To Roland Trimen 24 December [1867]
- To John Smith 26 December [1867]
- From W. S. Dallas 26 December 1867
- From Clair James Grece 29 December 1867
- To John Murray 31 December [1867]
- From Roland Trimen 31 December 1867
- From Mary Elizabeth Barber [after February 1867]
- From E. A. Darwin [before 11 October 1868]
- To ? [after June 1868]
- From J. J. Weir [before 30 May 1868]
- From Richard Barwell [1868?]
- From Edward Blyth [after 3 February 1868]
- DCP-LETT-5751
- DCP-LETT-5752
- DCP-LETT-5753
- DCP-LETT-5754
- From B. D. Walsh [before 31 October 1868]
- From Edmund and Charles Langton to S. E. Wedgwood [after 9 November 1868]
- DCP-LETT-5757
- From Osbert Salvin [1868?]
- DCP-LETT-5759
- To Moritz Wagner [April–June 1868]
- From Francis Darwin to Emma Darwin [after 16 October 1868]
- From W. D. Fox [before 14 May 1868]
- DCP-LETT-5763
- DCP-LETT-5764
- From Henry Farncombe Billinghurst [21 July 1863 – August 1870?]
- DCP-LETT-5766
- To W. H. Flower [1871?]
- To Charles Lyell [9 March 1868]
- To Francis Darwin 8 [June? 1868]
- From Hermann Müller January [1868]
- To W. E. Darwin [before 30 November 1876]
- To Roland Trimen 2 January [1868]
- From Alfred Wrigley 2 January 1868
- From Friedrich Hildebrand 2 January 1868
- From C. S. Vesselofski 3 January 1868
- From Edward Blyth 4 January 1868
- To Friedrich Hildebrand 5 January [1868]
- From F. A. von Hartsen 5 January 1868
- To J. D. Hooker 6 January [1868]
- From William Sweetland Dallas 8 January 1868
- To John Murray 9 January [1868]
- From John Murray 10 January [1868]
- To W. S. Dallas [14 January 1868]
- From Albert Gaudry 11 January 1868
- From Roland Trimen 13 January 1868
- From Asa Gray 14 January [1868]
- From J. D. Hooker 15 January 1868
- From W. S. Dallas 15 January 1868
- From J. D. Hooker [before 6 January 1868?]
- To Roland Trimen 16 January [1868]
- From John Brodie Innes 16 January 1868
- To J. B. Innes 20 January [1868]
- From Henry Lee 21 January 1868
- To Albert Gaudry 21 January [1868]
- To J. P. M. Weale 23 January [1868]
- To George Howard Darwin 24 January [1868]
- From Charles Pritchard 24 January 1868
- From the Commission générale des Ordres Royaux 24 January 1868
- From J. D. Hooker [25 January 1868]
- From W. E. Darwin to Emma Darwin [25 January 1868]
- From Charlotte Maria Cooper Darwin 25 January [1868]
- To Francis Galton 25 January [1868?]
- From Henry Bonham-Carter 26 January 1868
- From John Maurice Herbert 26 January 1868
- To Benjamin Dann Walsh 27 January [1868]
- To J. D. Hooker 27 [January 1868]
- From Henry Holland 27 January [1868]
- From Edward Cresy 27 January 1868
- From J. D. Hooker 28 January 1868
- To Julius von Haast 28 January [1868]
- From Julius Victor Carus 28 January 1868
- From Alfred Newton 29 January 1868
- From Alexander F. Boardman 29 January 1868
- From James Paget 29 January 1868
- To Edward Cresy 29 January [1868]
- From Thomas Henry Huxley [before 30 January 1868]
- To J. M. Herbert 30 January [1868]
- To Fritz Müller 30 January [1868]
- To T. H. Huxley 30 January [1868]
- From John Lubbock 30 January 1868
- From J. B. Innes 30 January 1868
- To J. D. Hooker [31 January 1868]
- From Thomas Rivers 31 January 1868
- From Bartholomew James Sulivan 31 January 1868
- From William Boyd Dawkins 31 January 1868
- From Henry Johnson 31 January 1868
- From Daniel Oliver [before February 1868]
- From W. T. Thiselton-Dyer [before 3 February 1878]
- From C. S. Bate [17 February 1868]
- From J. Daly [before 9 February 1868]
- DCP-LETT-5828
- To Reviewer [February–April 1868?]
- From Sarah Elizabeth Wedgwood to Emma Darwin [30 March – 12 April 1868]
- From J. D. Hooker 1 February 1868
- From William Bowman 1 February 1868
- From D. Appleton & Co. to Asa Gray 1 February 1868
- To J. V. Carus 1 February [1868]
- To William Lonsdale 1 February [1868]
- To J. D. Hooker 3 February [1868]
- From Albrecht Graf von Bernstorff 3 February 1868
- From W. D. Fox 3 February [1868]
- From Edward Wilson 4 February 1868
- From John Edward Gray 4 February 1868
- To Yorkshire Philosophical Society 8 February [1868]
- To George Moultrie Salt 5 February [1868]
- To G. G. Stokes 5 February [1868]
- From Ernst Haeckel [before 6 February 1868]
- To Ernst Haeckel 6 February [1868]
- To W. D. Fox 6 February [1868]
- To George Howard Darwin 6 February [1869]
- From John Murray 6 February [1868]
- From Edward Blyth 6 February 1868
- From J. E. Gray 6 February 1868
- From W. S. Dallas 6 February 1868
- From Alfred Russel Wallace 7 February 1868
- From William Baird 7 February 1868
- From Edward Cresy 7 February 1868
- From Herbert Spencer 8 February 1868
- To Asa Gray 9 February [1868]
- From Albany Hancock 8 February 1868
- From Frances Harriet Hooker [26 January 1868]
- To John Murray 9 February [1868]
- From Cicely Mary Hawkshaw to Emma Darwin 9 February [1868]
- To J. D. Hooker 10 February [1868]
- From Roland Trimen 10 February 1868
- To Henry Walter Bates 11 February [1868]
- To W. B. Tegetmeier 11 February [1868]
- To Fritz Müller 11 February 1868
- From Edward Blyth 11 February 1868
- From Henry Holland 11 February [1868]
- To Gardeners’ Chronicle 11 February [1868]
- From Charles Spence Bate 11 February 1868
- From W. S. Dallas 11 February 1868
- To Francis Trevelyan Buckland 12 February [1868]
- To Roland Trimen 12 February [1868]
- From John Lubbock 12 February [1868]
- From John Murray 12 February [1868]
- From Charles Owen Waterhouse 12 February 1868
- From John Blackwall 12 February 1868
- To G. H. K. Thwaites 13 February [1868]
- From B. J. Sulivan 13 February [1868]
- From J. D. Hooker 13 February 1868
- From J. E. Gray 13 February 1868
- To B. D. Walsh 14 February 1868
- From W. S. Dallas 14 February 1868
- From W. B. Tegetmeier [before 15 February 1868]
- To W. B. Tegetmeier 15 February [1868]
- From J. E. Gray 15 February 1868
- To John Lubbock 15 February [1868]
- From W. B. Tegetmeier [16–20 February 1868]
- To B. D. Walsh 17 February [1868]
- From James Shaw 17 February 1868
- To J. E. Gray 17 February [1868]
- From J. E. Gray 17 February 1868
- From George Brettingham Sowerby 17 February 1868
- From William Farr 17 February 1868
- To B. J. Sulivan 18 February [1868]
- To Henry Tibbats Stainton 18 February [1868]
- To George Gabriel Stokes 18 February [1868]
- From John Blackwall 18 February 1868
- From H. W. Bates 18 February 1868
- From Robert Caspary 18 February 1868
- To H. W. Bates 19 February [1868]
- From Edward Wilson 19 February 1868
- From C. O. Waterhouse 19 February 1868
- From W. S. Dallas 19 February 1868
- To Edward Wilson 20 February [1868]
- From William Henty 20 February 1868
- From John Lubbock 20 February 1868
- From Roland Trimen 20 February 1868
- From H. T. Stainton 20 February 1868
- From John William Douglas 20 February 1868
- To James Shaw 20 February 1868
- To W. B. Tegetmeier 21 February [1868]
- To H. T. Stainton 21 February [1868]
- To Roland Trimen 21 February [1868]
- From H. W. Bates 21 February 1868
- From Robert McLachlan 21 February 1868
- To Leonard Jenyns 22 February [1868]
- To A. R. Wallace 22 February [1868]
- To Jean Jacques Moulinié 22 February [1868]
- To H. W. Bates 22 February [1868]
- To J. V. Carus 22 February [1868]
- From Edward Wilson 22 February 1868
- From W. S. Dallas 22 February 1868
- To J. D. Hooker 23 February [1868]
- To Hermann Müller 23 February [1868]
- From Hermann Müller [after 23 February 1868]
- From Asa Gray 24 February 1868
- From A. R. Wallace 24 February 1868
- From John Murray 24 February [1868]
- From Robert McLachlan 24 February 1868
- From W. S. Dallas 24 February 1868
- From St George Jackson Mivart 24 February [1871]
- From St G. J. Mivart [25 June 1870?]
- From Asa Gray 25 February [1868]
- To W. D. Fox 25 February [1868]
- To Ludwig Rütimeyer 25 February [1868]
- To John Murray 25 February [1868]
- To Robert Caspary 25 February [1868]
- From Alexander Wallace 25 February 1868
- From Thomas Stretch to W. B. Tegetmeier 25 February 1868
- To Henry Lee 25 February [1868]
- To Robert McLachlan 25 February [1868]
- From J. D. Hooker 26[–7] February 1868
- From H. W. Bates 26 February 1868
- From Robert Buist 26 February 1868
- From Vladimir Onufrievich Kovalevsky 26 February 1868
- From J. J. Weir [after 27 February] 1868
- To A. R. Wallace 27 February [1868]
- To Alfred Newton 27 February [1868]
- To John Jenner Weir 27 February [1868]
- From G. G. Stokes 27 February 1868
- From Leonard Jenyns 27 February 1868
- From Robert Russell 27 February 1868
- From F. T. Buckland 27 February 1868
- From William Farr 27 February 1868
- To Philip Lutley Sclater 28 February [1868]
- To H. T. Stainton 28 February [1868]
- To G. G. Stokes 28 February [1868]
- To J. D. Hooker 28 February [1868]
- From William Erasmus Darwin to Emma Darwin 28 February [1868]
- From Alexander Wallace 28 February 1868
- DCP-LETT-5954
- From W. S. Dallas 28 February 1868
- To F. T. Buckland 29 February [1868]
- To Leonard Jenyns 29 February [1868]
- To J. J. Weir 29 February [1868]
- From William Sedgwick 29 February 1868
- From H. T. Stainton 29 February 1868
- To John Bush 29 February [1868]
- To Rolla Charles Meadows Rouse [after 12 March 1868]
- To Edward Hewitt [c. 22 March 1868]
- From J. J. Weir [before 3] March 1868
- From W. E. Darwin [13 April 1868]
- From A. R. Wallace 1 March 1868
- To Henry Doubleday 1 March [1868]
- To H. T. Stainton 2 March [1868]
- From A. R. Wallace 2 March [1867]
- From George Henry Lewes 2 March 1868
- From J. E. Gray 2 March 1868
- From W. E. Darwin 3 March [1868]
- To J. E. Gray 2 March [1868]
- From J. D. Hooker [3 March 1868]
- From John Murray 3 March [1868]
- From C. S. Bate 3 March 1868
- To Charles Lyell [3 November 1869]
- To William Sedgwick 4 March [1868]
- To C. S. Vesselofski 4 March 1868
- From Jonathan Peel 4 March 1868
- To John Murray 4 March [1868]
- To V. O. Kovalevsky 4 March [1868]
- From Armand de Quatrefages 4 March 1868
- From W. E. Darwin 5 March [1868]
- From John Price 5 March 1868
- To Jonathan Peel 6 March [1868]
- From Robert Buist 5 March 1868
- To F. M. Wedgwood 5 March [1860–9]
- From J. J. Weir [before 5] March 1868
- To J. J. Weir [6 March 1868]
- To William Ogle 6 March [1868]
- From John Murray 6 March [1868]
- To John Murray 6 March 1868
- From J. J. Moulinié 6 March [1868]
- To W. B. Tegetmeier [5–9 March 1868]
- To A. R. Wallace 7 March [1867]
- To Alfred Wrigley 7 March [1868]
- From H. T. Stainton 7 March 1868
- From J. J. Weir 7 March 1868
- From A. R. Wallace 8 March [1868]
- From Henry Doubleday 8 March 1868
- From W. S. Dallas 8 March 1868
- From Alfred Wrigley 9 March 1868
- From W. B. Tegetmeier 9 March 1868
- From Hermann Müller 10 March 1868
- To David Forbes [20 March 1868]
- To G. G. Stokes 11 March [1868]
- To Alfred Wrigley 11 March [1868]
- From J. J. Weir 11 March 1868
- From Alfred Wrigley 12 March 1868
- From H. W. Bates 12 March 1868
- To Alfred Wrigley [after 12 March 1868]
- To J. J. Weir 13 March [1868]
- From Giovanni Canestrini 13 March 1868
- From Alexander Wallace 14 March 1868
- From A. R. Wallace 15 March [1868]
- From Alphonse de Candolle 15 March 1868
- To Fritz Müller 16 March [1868]
- To Roland Trimen [16 March 1868]
- From J. J. Weir 16 March 1868
- To W. B. Tegetmeier 17 [March 1868]
- To A. R. Wallace 17 [March 1868]
- From J. V. Carus 17 March 1868
- From Jonathan Peel 17 March 1868
- From W. S. Dallas 17 March 1868
- To H. W. Bates 18 March [1868]
- To Charles Lyell [19 March 1868]
- From A. R. Wallace 19 March 1868
- From Paolo Mantegazza 19 March 1868
- From B. J. Sulivan 19 March 1868
- To Henry Doubleday 20 March [1868]
- From Elinor Mary Bonham-Carter 20 March [1868]
- From George Henslow 20 March 1868
- From Roland Trimen 20 March [1868]
- From William Robert Grove 20 March 1868
- To Maxwell Tylden Masters 21 March [1868]
- To A. R. Wallace [21 March 1868]
- To J. J. Moulinié 21 March [1868]
- To Roland Trimen [21 March 1868]
- To J. V. Carus 21 March [1868]
- To W. E. Darwin 21 March [1868]
- To J. J. Weir 22 March [1868]
- From Henrietta Anne Huxley to Emma Darwin 22 March [1867]
- From Ernst Haeckel 23 March 1868
- From J. J. Weir 23 March 1868
- To W. R. Grove 23 March [1868]
- To Albert Günther 23 March [1868]
- To G. H. Darwin [24 March 1868]
- From A. R. Wallace 24 March [1868]
- From J. J. Weir 24 March 1868
- From G. H. Darwin [27] March [1868]
- From Edward Blyth [before 25 March 1868]
- To Edward Blyth 25 March [1868]
- To W. E. Darwin 25 March [1868]
- To John Murray [25? March 1868]
- From B. D. Walsh 25 March 1868
- To J. D. Hooker [26 March 1868]
- From C.-F. Reinwald 26 March 1868
- From David Forbes 26 March 1868
- From Roland Trimen 26 March 1868
- From J. J. Weir [26] March 1868
- From Ferdinand von Hochstetter 26 March 1868
- To A. R. Wallace 27 March [1868]
- To J. J. Weir 27 March [1868]
- To Roland Trimen 27 March [1868]
- From Roland Trimen 27 March 1868
- To J. D. Hooker [28 March 1868]
- From George Henslow 28 March 1868
- From Henry Doubleday 28 March 1868
- From Edward Hewitt 28 March 1868
- From Harrison Weir 28 March 1868
- To W. E. Darwin [15 March 1868]
- From C. V. Naudin 29 March 1868
- From W. E. Darwin [after 25 March 1868]
- To Ernst Haeckel 30 March [1868]
- To William Bowman 30 March [1868]
- From John Bush 30 March 1868
- From Cuthbert Collingwood 30 March 1868
- From J. J. Weir 31 March 1868
- To William Thierry Preyer 31 March 1868
- To Ferdinand von Hochstetter 31 March [1868]
- From W. E. Darwin [7–15 April 1868]
- From Frederick F. Geach April 1868
- From J. J. Weir [before 28 April] 1868
- From William Bowman 1 April [1868]
- From G. H. K. Thwaites 1 April 1868
- To William Bowman 2 April [1868]
- From George Robert Gray 2 April 1868
- From Robert Caspary 2 April 1868
- To John Bush 2 April [1868]
- To Fritz Müller 3 April [1868]
- To J. D. Hooker 3 April [1868]
- From Henry Doubleday 3 April 1868
- From Camille Dareste 3 April 1868
- From Edward Blyth [3 April 1868]
- From Fritz Müller 3 April 1868
- From W. E. Darwin 3 April 1868
- To J. J. Weir 4 April [1868]
- To Edward Blyth 4 April [1868]
- From M. T. Masters 4 April 1868
- From J. J. Weir 5 April 1868
- From Edward Blyth 5 April 1868
- To A. R. Wallace 6 April [1868]
- From F. T. Buckland 6 April [1868]
- From ? 6 April 1868
- From St George Jackson Mivart 6 April 1868
- To ? 6 April [1869–71]
- From J. D. Hooker 7 April 1868
- From W. E. Darwin [7 April 1868]
- From C. S. Bate 7 April 1868
- From Ernest Faivre 7 April 1868
- To ? 7 April [1871]
- To W. E. Darwin 8 April [1868]
- From A. R. Wallace 8 [April] 1868
- From G. R. Gray 8 April 1868
- From Giovanni Canestrini 8 April 1868
- From W. S. Dallas 8 April 1868
- From John Smith 8 April 1868
- To A. R. Wallace 9 April [1868]
- From James Samuelson 10 April 1868
- From Albert Gaudry 11 April 1868
- From C. M. Hawkshaw to Emma Darwin 12 April 1868
- To B. D. Walsh 13 April [1868]
- To John Murray 13 April [1868]
- From George Henslow 13 April 1868
- From Roland Trimen 13 April 1868
- To Roland Trimen 14 April [1868]
- From Richard Trevor Clarke 14 [April 1868]
- From W. G. Howell 14 April [1868 or 1874]
- To John Murray 14 April [1868]
- To H. W. Bates 15 April [1868]
- To A. R. Wallace 15 April [1868]
- From W. E. Darwin [15 April 1868]
- To Henry Doubleday 15 April [1868]
- To W. E. Darwin 16 April [1868]
- From J. J. Weir 16 April 1868
- From Charles Henry Binstead 17 April 1868
- From W. R. Grove 17 April 1868
- To J. J. Weir 18 April [1868]
- From George Thurber 18–20 April 1868
- From J. J. Weir 20 April 1868
- From Henry Holland 20 April [1868]
- From H. W. Bates 20 April 1868
- From John Hellins 20 April 1868
- To Verlagsbuchhandlung Wilhelm Engelmann 21 April [1868]
- From George Bentham [before 22 April 1868]
- To H. W. Bates 22 April [1868]
- To Richard Kippist 22 April [1868]
- From W. E. Darwin [22? April 1868]
- To George Bentham 22 April 1868
- From Henry Doubleday 22 April 1868
- From Fritz Müller 22 April 1868
- To W. B. Tegetmeier 23 April [1868]
- From Gerolamo Boccardo 23 April 1868
- From Theodor Engelmann 25 April 1868
- From A. R. Wallace 28 April [1868]
- From J. J. Weir 28 April – 4 May 1868
- To A. R. Wallace 30 April [1868]
- From George Bentham 30 April 1868
- To T. H. Huxley [before 18 May 1868]
- From W. E. Darwin [5 and 8? April 1868]
- DCP-LETT-6150
- From J. J. Weir [4–7] May 1868
- From J. J. Weir [14 April 1868]
- From A. R. Wallace 1 May [1868]
- To George Bentham 1 May [1868]
- From James Murie 1 May 1868
- From B. D. Walsh 1 May 1868
- From George Cupples 1 May 1868
- From Edward Blyth 3 May 1868
- From Gilbert William Child 3 May [1868]
- From John Scott 4 May 1868
- To A. R. Wallace 5 May [1868]
- To G. W. Child 6 May [1868]
- To G. W. Child [6 May 1868]
- To Otto Staudinger 6 May [1868]
- To J. J. Weir 7 May [1868]
- From G. W. Child 7 May [1868]
- To Asa Gray 8 May [1868]
- From Leonard Jenyns 9 May 1868
- From George Cupples 11–13 May 1868
- To Richard Kippist 12 May [1868?]
- From Albert Günther 13 May 1868
- DCP-LETT-6171
- To W. D. Fox 14 May [1868]
- From Giovanni Canestrini 14 May 1868
- From Otto Staudinger 15 May 1868
- From John Harward 15 May 1868
- To J. J. Moulinié 16 May [1867]
- From Henry Nicholson Ellacombe 16 May 1868
- From Thomas Henry Farrer 17 May 1868
- From Asa Gray 18 May 1868
- From Edward Blyth 18 May 1868
- From J. J. Weir 18 May 1868
- From Friedrich Hildebrand 18 May 1868
- From T. H. Farrer 18 May 1868
- To G. H. K. Thwaites 19 May [1868]
- To T. H. Farrer 19 May [1868]
- From William Winwood Reade 19 May 1868
- From W. D. Fox 19 May [1868]
- To W. B. Tegetmeier 20 May [1868]
- From J. D. Hooker 20 May 1868
- To J. D. Hooker [20 May 1868]
- From Albert Müller 20 May 1868
- To Otto Staudinger 20 May 1868
- From St G. J. Mivart 20 May 1868
- From H. W. Bates 20 May 1868
- To H. W. Bates 21 May [1868]
- To J. D. Hooker 21 May [1868]
- From William Farr 21 May 1868
- To Deane Parker Pennethorne 22 May [1868]
- To W. B. Tegetmeier 22 May [1868]
- From John Harward 22 May 1868
- From Joseph Bullar 23 May 1868
- From W. W. Reade 23 May 1868
- From William Henty 23 May 1868
- From C. S. Bate 24 May 1868
- To C. S. Bate 25 May [1868]
- From Asa Gray 25 May 1868
- To John Murray 25 May 1868
- From W. B. Tegetmeier 25 May 1868
- From Edward Westey Janson 25 May 1868
- To W. B. Tegetmeier 26 May 1868
- From George Cupples 26 May 1868
- To William Henty 26 May 1868
- From John Murray 27 May [1868]
- From Friedrich Rolle 28 May 1868
- From H. W. Bates 28 May 1868
- To George Cupples 29 May [1868]
- To J. J. Weir 30 May [1868]
- From Hugh Browne 30 May 1868
- To Friedrich Rolle 31 May 1868
- DCP-LETT-6218
- From E. A. Darwin [11 October 1868]
- DCP-LETT-6220
- To Linnean Society 1 June 1868
- To Osbert Salvin 1 June 1868
- From Williams & Norgate 2 June 1868
- From Samuel James O’Hara Horsman 2 June [1868]
- To Fritz Müller 3 June 1868
- To S. J. O’H. Horsman 3 June 1868
- From J. J. Weir 3 June 1868
- To John Scott 3 June 1868
- From George Rogers 4 June 1868
- To H. B. Tristram 4 June 1868
- From E. W. Janson 4 June 1868
- From T. H. Farrer 4 June 1868
- To T. H. Farrer 5 June 1868
- From J. D. Hooker 5 June 1868
- To J. J. Weir 5 June 1868
- To J. D. Hooker 6 June [1868]
- From Henry Baker Tristram 6 June 1868
- To Bibliographisches Institut, Hildburghausen 8 June 1868
- To B. D. Walsh 9 June 1868
- From Rosa Bullar 9 June 1868
- From W. S. Dallas 9 June 1868
- To T. H. Huxley 10 June 1868
- From John Wright 11 June 1868
- From J. B. Innes 13 June 1868
- To J. B. Innes 15 June [1868]
- To J. D. Hooker 15 [June 1868]
- From W. B. Dawkins 15 June 1868
- To John Lubbock 15 June [1868]
- DCP-LETT-6246
- From J. D. Hooker 16 June 1868
- To J. D. Hooker 17 [June 1868]
- From Fritz Müller 17 June 1868
- From J. J. Weir [before 18 June 1868]
- To J. J. Weir 18 June [1868]
- From J. B. Innes 18 June [1868]
- From John Lubbock 19 June [1868]
- From Osbert Salvin 20 June 1868
- From J. D. Hooker 22 June 1868
- From Ernst Haeckel 22 June 1868
- From Oskar Schmidt 22 June 1868
- From George Cupples 22 June 1868
- To George Bentham 23 June 1868
- To Osbert Salvin 23 June [1868]
- To J. D. Hooker 24 June [1868]
- From W. W. Reade 28 June [1869]
- DCP-LETT-6261
- From H. B. Tristram 1 July 1868
- To ? [before 1 July 1868]
- From Edward Blyth 2 July 1868
- From Alphonse de Candolle 2 July 1868
- To Ernst Haeckel 3 July 1868
- From William Pole 3 July 1868
- From Friedrich Hildebrand 3 July 1868
- From F. F. Geach 4 July 1868
- To H. B. Tristram 4 July 1868
- From John Addison 6 July 1868
- To Alphonse de Candolle 6 July 1868
- From Julia Margaret Cameron [before 10 July 1868]
- From J. M. Cameron 10 July 1868
- From J. D. Hooker 12 July [1868]
- DCP-LETT-6273
- From George Cupples 13 July 1868
- To Charles Lyell 14 July 1868
- To J. D. Hooker 14 July 1868
- From Alphonse de Candolle 15 July 1868
- To Inland Revenue [17–21 July 1868?]
- To J. D. Hooker [18 July 1868]
- From Ernst Haeckel 17 July 1868
- From Edward Blyth 20 July 1868
- To Alphonse de Candolle 20 July [1868]
- From T. H. Huxley 20 July 1868
- From Eduard Koch 21 July 1868
- From G. H. K. Thwaites 22 July 1868
- From Louis Agassiz 22 July 1868
- To T. H. Huxley 23 July [1868]
- From J. D. Hooker 25 July 1868
- To Horace Darwin 26 [July 1868]
- From G. H. Lewes 26 July 1868
- DCP-LETT-6291
- To J. D. Hooker 28 July [1868]
- To G. H. Lewes 28 July [1868]
- From Alfred Wrigley 28 July 1868
- From Charles Peter Layard to G. H. K. Thwaites 28 July 1868
- From J. D. Hooker 29 July 1868
- From G. H. Lewes 30 July 1868
- From H. N. Ellacombe 30 July [1877]
- DCP-LETT-6299
- To Cassell, Petter & Galpin [August–December 1868]
- From Edward Blyth 3 August 1868
- From M. J. S. Schultze 4 August 1868
- From Robert Swinhoe 4 August 1868
- To M. J. S. Schultze [after 4 August 1868]
- From Ludwig Molendo and Alexander Walther 5 August 1868
- From Richard Bowdler Sharpe 5 August 1868
- From J. D. Hooker 6 August 1868
- To Thomas Woolner 6 August [1878]
- To G. H. Lewes 7 August [1868]
- From G. H. Lewes 8 August 1868
- From George Cupples 10 August 1868
- From Gustavus Detlef Hinrichs [before 13 August 1868]
- To Charles Alexander Johns 13 August [1868?]
- To G. D. Hinrichs 13 August 1868
- From Robert Brough Smyth 13 August 1868
- From J. V. Carus 14 August 1868
- To Asa Gray 15 August [1868]
- To J. V. Carus 16 August [1868]
- From A. R. Wallace 16 August [1868]
- From W. D. Fox 16 August [1875]
- To Fritz Müller 17 August 1868
- To J. D. Hooker 17 [August 1868]
- To Ernesto Susanni 18 August [1868]
- To A. R. Wallace 19 August [1868]
- To Louis Agassiz 19 August 1868
- To J. D. Hooker 19 August 1868
- From W. S. Dallas 19 August 1868
- From J. D. Hooker [20 August 1868]
- To J. D. Hooker 23 August [1868]
- From T. C. Eyton 23 August [1868]
- From Edward Blyth 24 August 1868
- To Henry Austin Bruce 24 August [1868?]
- To T. C. Eyton 25 August [1868]
- To Eduard Koch 27 August 1868
- From B. D. Walsh 29 August 1868
- To J. J. Moulinié 29 August [1868]
- From J. D. Hooker 30 August 1868
- From A. R. Wallace 30 August [1868]
- From J. B. Innes 31 August 1868
- From Edward Blyth 31 August 1868
- From G. D. Hinrichs 31 August 1868
- From Ellen Frances Lubbock [before 31 August 1868]
- From Erasmus Alvey Darwin [24 September – 10 October 1868]
- DCP-LETT-6340
- To the Traffic Manager, South Eastern Railway [c. September 1868]
- To J. D. Hooker 1 September [1868]
- To J. J. Weir 1 September 1868
- To G. H. K. Thwaites 2 September 1868
- To J. B. Innes 2 September 1868
- From William Ogle 2 September 1868
- To W. B. Tegetmeier 3 September [1868]
- From Henry Fletcher Hance 3 September 1868
- From J. D. Hooker 5 September 1868
- From A. R. Wallace 5 September [1868]
- From H. B. Tristram 5 September 1868
- From Gaston de Saporta 6 September 1868
- From Emanuel Bonavia [before 7 September 1868]
- To M. J. Berkeley 7 September 1868
- From M. T. Masters 7 September 1868
- From J. J. Moulinié 7 September 1868
- To W. B. Tegetmeier 8 September [1868]
- To H. B. Tristram 8 September 1868
- To J. D. Hooker [8–10 September 1868]
- From Edward Blyth 8 September 1868
- From Fritz Müller 9 September 1868
- From H. W. Bates 10 September 1868
- From T. H. Farrer 10 September 1868
- From A. R. Wallace [11 September 1868]
- From T. H. Huxley 12 September 1868
- From A. R. Wallace [14 September 1868]
- To T. H. Farrer 15 September [1868]
- From A. B. Meyer 15 September 1868
- To G. D. Hinrichs 16 September 1868
- To A. R. Wallace 16 September [1868]
- To John Murray 16 September [1868]
- From Asa Gray 17 September 1868
- From John Syer Bristowe 17 September 1868
- To J. S. Bristowe 18 September 1868
- From Edward Blyth 17 September 1868
- From T. H. Farrer 17 September 1868
- From Dyson Lacy [before 13 August 1868]
- From A. R. Wallace 18 September [1868]
- From John Murray 18 September [1868]
- To John Dean Caton 18 September 1868
- To Frederic Higgins? 18 September 1868
- To T. H. Farrer 19 September [1868]
- To James Croll 19 September 1868
- From T. H. Farrer 20 September 1868
- To T. H. Huxley [13–21 September 1868]
- To B. D. Walsh 21 September 1868
- From Edward Blyth 21 September 1868
- To the editor of Annals and Magazine of Natural History 22 September [1868]
- From John Murray 22 September [1868]
- To A. R. Wallace 23 September [1868]
- From Charles William Nunn 23 September 1868
- From James Croll 23 September 1868
- To T. H. Farrer 24 September [1868]
- To Gaston de Saporta 24 September 1868
- From T. H. Farrer 24 September 1868
- To C. W. Nunn 25 September [1868]
- To J. D. Hooker 25 September 1868
- DCP-LETT-6394
- To G. H. K. Thwaites 28 September [1868]
- From J. D. Hooker [28 September 1868]
- From J. B. Innes 28 September 1868
- From Tristram Charles Sawyer Speedy 29 September 1868
- From H. W. Bates 29 September 1868
- From Asa Gray 30 September 18[80]
- From George Rolleston 30 September 1868
- To Henry Michael Jenkins [after 1 October 1868]
- From Edward Blyth [after 24 February 1867]
- DCP-LETT-6404
- From George Bentham [after 29 September 1868]
- From Emma Darwin to J. B. Innes 24 June [1874]
- From Edward Blyth 1 October 1868
- From George Robert Crotch 2 October [1868]
- From A. R. Wallace 4 October 1868
- From Edward Blyth 4 October 1868
- From J. D. Hooker 3 October 1868
- From Joseph Plimsoll 5 October 1868
- To A. R. Wallace 6 October [1868]
- To John Tyndall 7 October 1868
- From John Tyndall 9 October 1868
- To Hermann Müller 9 October 1868
- From Adam Sedgwick 11 October 1868
- From W. S. Dallas 12 October 1868
- To Adam Sedgwick 13 October 1868
- From Edward Wilson 14 October 1868
- From G. H. K. Thwaites 16 October 1868
- From J. J. Weir [before 17] October 1868
- To J. J. Weir 17 October 1868
- From W. S. Dallas 19 October 1868
- To John Tyndall 20 October 1868
- From Karl von Scherzer 20 October 1868
- To W. D. Fox 21 October [1868]
- To August Weismann 22 October 1868
- From J. P. M. Weale 23 October 1868
- To Karl von Scherzer 25 October 1868
- From Sven Nilsson to J. D. Hooker 25 October 1868
- To G. H. K. Thwaites 26 October [1868]
- From T. H. Farrer 26 October 1868
- From John Lubbock 27 October [1867]
- From John Price 28 October 1868
- To T. H. Farrer 29 October [1868]
- From W. D. Fox 29 October [1868]
- To B. D. Walsh 31 October 1868
- To Sven Nilsson 31 October [1868]
- From Fritz Müller 31 October 1868
- From Samuel Owen Glenie to G. H. K. Thwaites [before 31 October 1868]
- From Sam Sanday to W. B. Tegetmeier 29 October 1868
- To Scientific Opinion [before 20 October 1869]
- From John Lubbock 2 November [1868]
- From M. T. Masters 2 November 1868
- From T. H. Farrer 2 November 1868
- DCP-LETT-6446
- To W. D. Fox 4 November 1868
- From Friedrich Hildebrand 4 November 1868
- From John Lubbock 6 November [1868]
- To Ernst Haeckel 7 November 1868
- From W. S. Dallas 7 November 1868
- From Ernst Haeckel 9 November 1868
- From Edmund Langton to S. E. Wedgwood 9 November [1868]
- From Albert Gaudry 9 November 1868
- From W. D. Fox 9 December [1868]
- From John Lubbock and E. F. Lubbock 11 November [1868]
- To W. S. Dallas 11 November [1868]
- From G. H. Lewes 12 November 1868
- To G. H. Lewes [13 November 1868]
- To Friedrich Hildebrand 14 November [1868]
- From T. H. Huxley 13 November 1868
- To Friedrich Hildebrand 16 November 1868
- To John Higgins 16 November 1868
- From G. H. Lewes [17 November 1868]
- From W. S. Dallas 17 November 1868
- To Albert Gaudry 17 November 1868
- To Gardeners’ Chronicle 17 November 1868
- To G. H. Lewes 18 November 1868
- To Ernst Haeckel 19 November 1868
- From Alfred Tylor 19 November 1868
- From Friedrich Rolle 20 November 1868
- From Edward Blyth 20 November 1868
- From T. H. Farrer 21 November 1868
- From J. D. Hooker 24 November 1868
- To Friedrich Rolle 24 November 1868
- To James Croll 24 November 1868
- From Ernst Haeckel 25 November [1868]
- To T. H. Farrer 26 November 1868
- To J. D. Hooker 26 November [1868]
- From J. D. Hooker 26 November 1868
- From John Lubbock 26 November [1868]
- To John Price 26 November 1868
- From Alexander Shaw to Marion Bell 27 November 1868
- From W. S. Dallas 27 November 1868
- From S. O. Glenie 27 November 1868
- To Fritz Müller 28 November 1868
- From J. D. Hooker [28 November 1868]
- To Director, Natura Artis Magistra 28 November 1868
- From T. H. Farrer 30 November 1868
- To J. B. Innes 1 December 1868
- To J. D. Hooker 2 December 1868
- From J. D. Caton 2 [October] 1868
- From James Croll 2 December 1868
- From James Croll [2 December 1868]
- From Frederick Behrens 3 December 1868
- To James Croll 4 December [1868]
- From J. B. Innes 4 December 1868
- To Frederick Behrens 6 December 1868
- From J. B. Innes 7 December 1868
- From John Lubbock 8 December 1868
- From G. H. Darwin 8 December 1868
- To G. H. Darwin [9 December 1868]
- To J. B. Innes 10 December [1868]
- From T. H. Huxley 18 December 1868
- From J. Noordhoek Hegt 11 December 1868
- To W. D. Fox 12 December [1868]
- From J. B. Innes 12 December 1868
- From J. B. Innes 14 December 1868
- From John Evans 14 December 1868
- From Lachlan McLean to J. B. Innes 15 December 1868
- To J. B. Innes 16 December 1868
- From John Hellins 16 December 1868
- From J. B. Innes 18 December 1868
- To J. N. Hegt 18 December 1868
- To A. B. Buckley 18 December [1871]
- To Louis Bertillon 18 December 1871
- To Ernst Haeckel 20 December 1868
- From V. O. Kovalevsky 22 December 1868
- From J. D. Hooker [23 December 1868]
- To J. D. Hooker 25 December [1868]
- To J. V. Carus 26 December [1866]
- To G. H. K. Thwaites 29 December 1868
- To J. D. Hooker 29 December 1868
- From William Alexander Wooler 29 December 1868
- From Sven Nilsson 31 December 1868
- From Cassell, Petter & Galpin 31 December 1868
- From John Lubbock [after 5 August 1869]
- From Francis Darwin [before 8 May 1869]
- To Walter Baldock Durrant Mantell [before 10 April 1856]
- From Francis Darwin [before 4 January 1870]
- From E. A. Darwin [after 21 April 1869]
- From George Henslow [after 22 February 1869]
- From C. H. Thiebout [1871]
- To [Alfred Malherbe?] [1862–5?]
- DCP-LETT-6525
- To Bryceson Brothers & Co. [after June 1868?]
- From J. R. G. Barr to George Cupples [after 11 May 1868?]
- DCP-LETT-6528
- From G. R. Crotch [after 5 October 1868]
- From G. R. Crotch [after 16 October 1868]
- From Albert Günther [c. 23 March 1868?]
- To Edward Blyth [after July 1868]
- From James Paget [1869]
- From Frederick Smith [c. 10 March 1868?]
- From Margaret Susan Vaughan Williams to Henrietta Emma Darwin [after 14 October 1869]
- DCP-LETT-6536
- To J. J. Weir [before 18 May 1868]
- From J. Knightly Ince [1857–61?]
- From E. A. Darwin 26 [November 1869 or later]
- To William Thierry Preyer [before 21 March 1869]
- From Vladimir Onofrievich Kovalevsky [January–March 1869]
- From William Erasmus Darwin [January 1869]
- To T. H. Huxley [11 or 18 May 1871]
- From James Orton 4 January 1869
- From George Cupples 4 January 1869
- To Sven Nilsson 5 January 1869
- To Julius Victor Carus 5 January 1869
- To Thomas Belt 6 January [1868]
- To George Cupples [6–9? January 1869]
- From George Maw 9 January 1869
- To James Croll 10 January 1869
- From George Cupples 11 January 1869
- From Fritz Müller 12 January 1869
- To J. D. Hooker 13 January 1869
- From Lydia Ernestine Becker 13 January 1869
- To George Maw 13 January 1869
- From George Maw 14 January 1869
- From J. D. Hooker 15 January 1869
- From George Cupples 15 January 1869
- From Thomas Henry Farrer 15 January 1869
- To J. D. Hooker 16 January [1869]
- From William Winwood Reade 17 January 1869
- To George Maw 17 January [1869]
- From J. D. Hooker 18 January 1869
- From Alfred Russel Wallace 20 January 1869
- From William Kencely Bridgman to John Gwyn Jeffreys [before 21 January 1869]
- To Mary Somerville 21 January [1869]
- From Maxwell Tylden Masters 21 January 1869
- To W. K. Bridgman 21 January [1869]
- From George Cupples 21 January 1869
- To A. R. Wallace 22 January [1869]
- To J. D. Hooker [22 January 1869]
- From J. V. Carus 22 January 1869
- To James Orton 23 January [1869]
- From W. K. Bridgman 23 January 1869
- From T. C. Eyton [before 23 January 1869]
- To T. C. Eyton 24 January 1869
- From Archibald McNeill 24 January 1869
- From C. F. Claus 24 January 1869
- From Alice Bonham-Carter to Emma Darwin 25 January [1870]
- From William Chester Tait 26 January 1869
- From T. C. Eyton 26 January [1869]
- From Gilbert William Child 26 January [1870]
- To John Phillips 27 January 1869
- To C. F. Claus 28 January 1869
- From William Boyd Dawkins 29 January [1870]
- From A. R. Wallace 30 January 1869
- From David Forbes 30 January 1869
- To James Croll 31 January [1869]
- From Charles Phipps Haussoullier 31 January 1869
- To John Warburton Robinson 1 February 1869
- From D. Appleton & Co. to Asa Gray 1 February 1869
- From S. A. Merrell 1 February 1869
- From Charles Spence Bate 1 February 1869
- To A. R. Wallace 2 February [1869]
- From J. V. Carus 2 February 1869
- To W. C. Tait 2 February [1869]
- From Andrew Crombie Ramsay 2 February 1869
- To Alexander Agassiz [23 October 1870?]
- To John Murray [1–3 February 1869]
- From John Murray 3 February [1869]
- To A. C. Ramsay 3 February [1869]
- From James Croll 4 February 1869
- To William Bernhard Tegetmeier 5 February [1869]
- To J. V. Carus 5 February 1869
- From Frederik Anthony von Hartsen 5 February 1869
- To James Croll 6 February [1869]
- From G. H. Darwin 6 February 1869
- From C. F. Claus 6 February 1869
- To David Forbes 7 February [1869]
- From John Lubbock 8 February 1869
- From J. D. Hooker [25 January 1869]
- From Georg Recht 9 February 1869
- From Ferdinand Maria Malven 12 February [1869]
- To F. M. Malven [after 12 February 1869]
- From Edward Wilson 12 February 1869
- To ? 12 February [1870–82]
- To John Lubbock [before 13 February 1869]
- From John Lubbock 13 February [1869]
- From G. H. Darwin 14 February 1869
- From Jean Jacques Moulinié 15 February 1869
- From James Croll 15 February 1869
- From G. W. Child 16 February [1870]
- To Eliza Meteyard [18 February 1869]
- From Hugo Thiel 18 February 1869
- From Philip de Malpas Grey-Egerton 18 February 1869
- From Ernest Faivre 18 February 1869
- From Eliza Meteyard 19 February 1869
- From W. C. Tait 19 February 1869
- From Archibald McNeill 20 February 1869
- To ? 20 February [1869]
- To J. J. Moulinié 22 February [1869]
- From George Henslow 22 February 1869
- From R. F. Cooke 22 February 1869
- To R. F. Cooke 23 [February 1869]
- From R. F. Cooke 23 February 1869
- To James Croll 24 February [1869]
- To W. C. Tait 24 February 1869
- From Henry Holland to Erasmus Alvey Darwin 24 February [1869]
- To W. B. Tegetmeier 25 February [1869]
- To Hugo Thiel 25 February 1869
- From P. G. King 25 February 1869
- From G. H. Darwin [23 February 1869]
- From C. S. Bate 1 March 1869
- From Edward Blyth 1 March 1869
- From W. C. Tait 2 March 1869
- To Thomas Roscoe Rede Stebbing 3 March 1869
- From T. C. Eyton 4 March 1869
- To A. R. Wallace 5 March [1869]
- From T. R. R. Stebbing 5 March 1869
- From W. C. Tait 5 March 1869
- To T. C. Eyton 6 March [1869]
- To Armand de Quatrefages 6 March 1869
- From J. D. Hooker [7 March 1870]
- To J. D. Hooker 8 March [1869]
- To R. F. Cooke 9 March [1869]
- To Thomas Henry Huxley 10 March 1869
- To Thomas Woolner 10 March [1870]
- From A. R. Wallace 10 March 1869
- From Henry Landor 10 March 1869
- From R. F. Cooke 10 March 1869
- From T. H. Huxley 11 March 1869
- From J. D. Hooker 11 March 1869
- From Georg Recht 1 March 1869
- From George Cupples 11 March 1869
- To T. H. Huxley 12 March [1869]
- From R. F. Cooke 12 March 1869
- To Vernon Lushington [12 March 1869]
- To W. C. Tait 12 and 16 March 1869
- To Fritz Müller 14 March 1869
- From Fritz Müller 14 March 1869
- From Ernest Faivre 15 March 1869
- DCP-LETT-6664
- From T. H. Huxley 17 March 1869
- To J. D. Hooker 17 March [1869]
- From Louis Rérolle 17 March 1869
- To Fritz Müller 18 March 1869
- To George Cupples 18 March [1869]
- To Ellen Frances Lubbock [26 September 1869?]
- To T. H. Huxley 19 March [1869]
- From C. F. Claus 19 March 1869
- To Charles Lyell 20 March [1869]
- To Julius Dub 20 March 1869
- To John Dean Caton 20 March 1869
- From Samuel Owen Glenie 20 March 1869
- From W. T. Preyer 21 March 1869
- To A. R. Wallace 22 March [1869]
- From Karl von Seidlitz 22 March 1869
- From George Cupples 22 March 1869
- From Harrison William Weir 23 March 1869
- From A. R. Wallace 24 March 1869
- From Martin Wilckens 25 March 1869
- To Martin Wilckens [after 25 March 1869]
- To A. R. Wallace 27 March [1869]
- From J. D. Hooker to Emma Darwin 29 March 1869
- From Armand de Quatrefages 29 March 1869
- To W. T. Preyer 29 March 1869
- To J. D. Hooker 30 March [1869]
- To C. F. Claus 31 March 1869
- From Richard Spruce [before 1 April 1869]
- To Richard Spruce 1 April 1869
- To Charles Lyell 5 March [1869]
- From George M’Ilvaine Ramsey 5 April 1869
- To W. C. Tait 7 April [1869]
- From Alfred Newton 9 April 1869
- To W. B. Dawkins 12 April [1871]
- From W. C. Tait 13 April 1869
- From Richard Spruce 15 April 1869
- To W. B. Tegetmeier 17 April 1869
- From Edward Blyth 17 April 1869
- From W. B. Tegetmeier [before 18 April 1869]
- To George Charles Wallich 18 April [1869]
- To W. B. Tegetmeier 18 April [1869]
- From A. R. Wallace 18 April [1869]
- From George Maw 18 April 1869
- To W. C. Tait 18 April [1869]
- To J. Noordhoek Hegt 19 April 1869
- To A. R. Wallace 14 April 1869
- From Edward Jones to Mary Anne Ruck 28 April 1869
- From Georg Recht 21 April 1869
- From Orange Judd & Co 21 April 1869
- From Alfred William Bennett 22 April 1869
- From J. N. Hegt [23 April 1869]
- From John Price 24 April 1869
- To P. G. King 24 April 1869
- From Edward Blyth 26 April 1869
- To George Maw 27 April [1869]
- To J. N. Hegt 27 April [1869]
- From John Murray 28 April [1869]
- To James Paget 29 April [1869]
- From J. V. Carus 29 April 1869
- To John Murray 29 April [1869]
- From R. F. Cooke 29 April 1869
- From Spiridion Brusina 29 April 1869
- From M. T. Masters 30 April 1869
- To Linnean Society, President and Council [10 May 1869]
- From J. J. Weir [1–13] May 1869
- From A. W. Bennett 3 May 1869
- To Charles Lyell 4 May [1869]
- To J. V. Carus 4 May 1869
- From T. H. Farrer 5 May 1869
- From Charles Lyell 5 May 1869
- From J. D. Caton 5 May 1869
- To T. H. Farrer 6 May [1869]
- To J. D. Hooker [before 7 May 1869]
- From T. H. Huxley 7 May 1869
- From Harrison William Weir 7 May 1869
- From George Bentham 7 May 1869
- DCP-LETT-6734A
- To T. H. Huxley 8 May [1869]
- From Asa Gray and Jane Loring Gray 8 and 9 May 1869
- To Spiridion Brusina 8 May [1869]
- From David Taylor Fish to Gardeners’ Chronicle 8 May 1869
- From Asa Gray 9 May [1869]
- To Gardeners’ Chronicle 9 May [1869]
- From T. H. Farrer 9 May 1869
- To Linnean Society, President and Council 10 May 1869
- From Louis Rérolle 10 May 1869
- From W. C. Tait 10 May 1869
- To George Bentham 10 May [1869]
- From George Bentham 10 May 1869
- From John Hellins 10 May 1869
- To J. J. Weir 13 May [1869]
- From John Beck 15 May 1869
- From George Maw 17 May 1869
- DCP-LETT-6749
- DCP-LETT-6750
- To Charles Lyell 20 May 1869
- From Henry Maudsley 20 May 1869
- To J. J. Weir 20 May [1869]
- To John Wheldon 20 May [1869]
- To W. W. Reade 21 May [1868]
- To James Crichton-Browne 22 May 1869
- To George Maw 22 May [1869]
- To J. D. Caton 24 May 1869
- From J. J. Weir 26 May 1869
- To J. J. Weir 27 May [1869]
- To John Higgins 27 May 1869
- From M. A. Ruck to Francis Darwin [29 April – 27 May 1869]
- From Adolf Reuter 30 May 1869
- To Max Schmidt [29 April 1869]
- From J. J. Weir June 1869
- DCP-LETT-6764
- From G. H. Darwin [c. 17 July 1871]
- From William Buckler [after 8 June 1869]
- To Asa Gray 1 June [1869]
- To W. C. Tait 1 June [1869]
- From James Crichton-Browne 1 June 1869
- From George Cupples [1 June 1869]
- To George Cupples [after June 1869]
- To Stephen Paul Engleheart 2 June [1869]
- To Adolf Reuter 2 June 1869
- To Joseph Henry Gilbert 3 June [1869]
- From J. V. Carus 3 June 1869
- From Robert Elliot to George Cupples 4 June 1869
- From Ponderer to the Athenæum [before 5 June 1869]
- From J. D. Hooker 6 June 1869
- To John Traherne Moggridge 7 June 1869
- From Henry Walter Bates 8 June 1869
- To James Crichton-Browne 8 June 1869
- From George Swaysland 12 June 1869
- From Max Schmidt 14 June 1869
- From Gerolamo Boccardo 15 June 1869
- From Fritz Müller 15 June 1869
- From William Aitchison to George Cupples 16 June 1869
- From Eduard Koch 17 June 1869
- From Thomas Russell to George Cupples 18 June 1869
- To the Athenæum 19 June 1869
- To Frederick Bates 19 June [1868?]
- To T. H. Huxley 20 June [1870]
- From George Cupples 20 June 1869
- To J. V. Carus 21 June [1869]
- From Robert Elliot to George Cupples 21 June 1869
- To Eduard Koch 22 June [1869]
- To J. D. Hooker 22 June [1869]
- From R. F. Cooke 22 June 1869
- To ? 23 June 1869
- From Alexander F. Boardman 23 June 1869
- From A. R. Wallace 23 June [1869]
- To R. F. Cooke 23 June [1869]
- From James Croll 23 June 1869
- From J. D. Hooker 24 June 1869
- To Alexander Goodman More 24 June [1869]
- To A. R. Wallace 25 June [1869]
- To Edwin Ray Lankester 25 June 1869
- From William Aitchison to George Cupples 25 June 1869
- From Robert Elliot to George Cupples 25 June 1869
- To Joseph Bullar 27 June [1862]
- From Edward Lacy Garbett to the Athenæum 29 June 1869
- To Edward Alfred Smith 30 June [1869]
- From W. B. Tegetmeier 30 June 1869
- From John Beddoe [22 August – 12 September 1869]
- From William Aitchison to George Cupples 30 June 1869
- To J. J. Weir 1 July [1869]
- To W. B. Tegetmeier 2 July [1869]
- From Ernst Haeckel 2 July 1869
- From John Lubbock 2 July [1869]
- To R. F. Cooke 2 July [1869]
- From John Scott 2 July 1869
- From James Oliver to George Cupples 3 July 1869
- From William Erasmus Darwin 5 July [1869]
- From Louis Agassiz 6 July 1869
- From John Graham to George Cupples 6 July 1869
- To William Ogle 7 July [1869]
- To W. E. Darwin 7 [July 1869]
- To the Athenæum 7 [July] 1869
- From William Ogle [after 7 July 1869]
- To J. D. Hooker 8 July [1869]
- To T. H. Huxley 9 July [1869]
- From George Robert Gray 9 July 1869
- From W. C. Tait 11 July 1869
- From W. E. Darwin 12 July 1869
- To G. R. Gray 12 July 1869
- DCP-LETT-6828
- From Alexander Wallace 15 July [1869]
- From T. H. Huxley 16 July 1869
- From Allan C. Pagan to George Cupples 16 July 1869
- From J. D. Hooker 17 July 1869
- To W. C. Tait 17 July [1869]
- From W. B. Dawkins 17 July 1869
- To Albany Hancock 17 July [1869]
- To Fritz Müller 18 July [1869]
- From Adolph Reuter 18 July 1869
- To W. B. Dawkins 19 July [1869]
- From E. L. Garbett to the Athenæum 19 July 1869
- From W. B. Tegetmeier 20 July 1869
- From John Lubbock 20 July [1869]
- From James Rait to George Cupples 20 July 1869
- To W. B. Tegetmeier 21 July [1869]
- From Jules Joseph Fleury 23 July 1869
- To the editors of the Annals and Magazine of Natural History 23 July 1869
- To J. D. Hooker 24 July [1869]
- From Albany Hancock 25 July 1869
- From Charles Voysey 27 July 1869
- To Dudley Campbell 29 July [1869]
- To Alfred Merle Norman 29 July [1869]
- From Louis Rérolle 30 July 1869
- From C. S. Bate 31 July 1869
- From W. B. Dawkins 31 July 1869
- From A. M. Norman 2 August 1869
- To Louis Rérolle 2 August [1869]
- To Walter Elliot 3 August [1869]
- To Ernst Haeckel 3 August [1869]
- To John Lubbock 3 August 1869
- To M. C. Lloyd 4 August [1869]
- From J. D. Hooker 5 August 1869
- From John Lubbock 5 August [1869]
- To J. D. Hooker 7 August [1869]
- From Walter Elliot 7 August 1869
- From T. H. Farrer 8 August 1869
- To W. B. Dawkins 14 July [1869]
- To Thomas Spencer Cobbold 9 August [1869]
- To T. H. Farrer 10 August [1869]
- To Achille Quadri 9 August 1869
- From John Blackwall 10 August 1869
- From T. H. Farrer 12 August 1869
- From J. D. Hooker 13 August 1869
- To J. D. Hooker 14 August [1869]
- From George St Clair 14 August 1869
- From John Beddoe 21 August 1869
- From Federico Delpino 22 August 1869
- From Asa Gray 23 August 1869
- From W. C. Tait [23 August 1869]
- To Federico Delpino 24 and 25 August [1869]
- To W. B. Tegetmeier 25 August 1869
- From Frederick Smith 26 August 1869
- To W. C. Tait 27 August [1869]
- DCP-LETT-6873
- DCP-LETT-6874
- DCP-LETT-6875
- From T. S. Cobbold 1 September [1869]
- From William Bowman 3 September [1869]
- To Frans Cornelis Donders 6 September 1869
- From J. D. Hooker 7 September 1869
- From Walter Elliot 7 September 1869
- To Fritz Müller 8 September [1869]
- From James Orton 8 September 1869
- From Edward Burnett Tylor 8 September 1869
- From John Blackwall 8 September 1869
- To Gustav Jäger 9 September 1869
- To J. D. Hooker 10 September [1869]
- From Edward Blyth 13 September 1869
- From John Beddoe 13 September 1869
- From George Cupples 13 September 1869
- From V. O. Kovalevsky 13 September 1869
- To Edward Blyth 14 September [1869]
- From Frederick Smith 14 September 1869
- To Samuel Hubbard Scudder 15 September [1869]
- From J. T. Moggridge 16 September [1869]
- From J. D. Hooker 17 September 1869
- To J. D. Hooker 18 [September 1869]
- From John Murray 18 September [1869]
- From T. H. Farrer 18 September 1869
- From J. T. Moggridge 18 September 1869
- DCP-LETT-6899F
- To John Murray [after 18 September 1869]
- To T. H. Huxley 21 September [1869]
- From M. T. Masters 21 September 1869
- To Albert Günther 21 September 1869
- From Hermann Müller 22 September 1869
- From Adolf Reuter 23 September 1869
- From Albert Günther 23 September 1869
- From Frances Harriet Hooker to Emma Darwin 24 September [1868]
- From J. D. Hooker 24 September 1869
- From George Henslow 25 September 1869
- To Albert Günther 25 September 1869
- From Albert Günther [before 27 September 1869]
- To Adolf Reuter 27 September 1869
- To Albert Günther 27 September [1869]
- From T. H. Huxley 28 September 1869
- From Alphonse de Candolle 28 September 1869
- To W. B. Tegetmeier 28 September [1869]
- To Victor Masson [after 29 September 1869]
- From Ernst Haeckel 29 September 1869
- From Victor Masson 29 September 1869
- From W. C. Tait 29 September 1869
- DCP-LETT-6920
- To W. B. Tegetmeier 1 October [1869]
- To T. H. Huxley 1 October [1869]
- To J. D. Hooker 2 October [1869]
- To Ernst Haeckel 3 October [1869]
- To James Orton 7 October [1869]
- From Frederick Smith 8 October 1869
- To T. Thompson 9 October 1869
- From Federico Delpino 9 October 1869
- From T. H. Farrer 9 October 1869
- To T. H. Farrer 10 October [1869]
- From Asa Gray 11 October [1868]
- To J. D. Hooker 11 October 1869
- To Alphonse de Candolle 11 October 1869
- From John Fox & Sons 12 October 1869
- From T. H. Farrer 13 October 1869
- To T. H. Huxley 14 October 1869
- From L. E. Becker 14 October 1869
- To Federico Delpino 14 October 1869
- From John Brodie Innes 15 October 1869
- From Robert Swinhoe 16 October 1869
- From T. H. Farrer 17 October 1869
- To J. B. Innes 18 October 1869
- From Fritz Müller 18 October 1869
- From W. B. Dawkins 19 October 1869
- To T. H. Farrer 20 October [1869]
- From Asa Gray 20 October 1869
- From J. V. Carus 20 October 1869
- From J. B. Innes 20 October 1869
- From A. R. Wallace 20 October 1869
- From J. J. Moulinié 20 October 1869
- To A. R. Wallace 21 October 1869
- To [?] 21 September [1869]
- From Emile Alglave 22 October 1869
- To J. V. Carus 22 October [1869]
- To J. J. Moulinié 23 October [1869]
- DCP-LETT-6955F
- From G. H. Darwin to A. R. Wallace 23 October 1869
- From Carl Vogt 26 October 1869
- From Asa Gray 26 and 29 October [1869]
- To Anton Kerner von Marilaun 27 October 1869
- From T. H. Farrer 27 October 1869
- To J. V. Carus [30 October 1869]
- To Carl Vogt 30 October 1869
- To J. V. Carus 30 October 1869
- From Eduard Koch 30 October 1869
- To ? 30 October [1869 or 1870]
- To Francis Henry Salvin? 31 October 1869
- From G. H. Darwin [18 October 1869]
- From J. D. Hooker [31 May 1870]
- From Federico Delpino 1 November 1869
- To Charles Lyell 1 [November 1869]
- To Robert Francis Cooke [22 February 1869]
- From Charles Lyell 2 November 1869
- From R. F. Cooke 2 November 1869
- To Eduard Koch 4 November 1869
- From George Cupples [4–10 November 1869]
- From J. J. Moulinié 5 November 1869
- From Frederick Smith 5 November 1869
- From T. H. Farrer 5 November 1869
- From J. V. Carus 6 November 1869
- From George Busk 7 November 1869
- To Antoinette Louisa Brown Blackwell 8 November [1869]
- To John Murray 8 November [1869]
- To James Paget 8 November [1869]
- From John Murray 8 November [1869]
- From A. W. Bennett to Nature 8 November 1869
- To Frederick Smith 9 November [1869]
- To A. W. Bennett 9 November [1869]
- To J. V. Carus 9 November [1869]
- From E. A. Darwin 11 November [1869]
- From F. C. Donders 12 November 1869
- From Hermann Müller 12 November 1869
- To J. D. Hooker 13 November [1869]
- From Charles-Ferdinard Reinwald 13 November 1869
- To Nature 13 November [1869]
- From J. D. Hooker 14 November 1869
- To J. J. Moulinié 15 November [1869]
- From Adolf Bernhard Meyer 16 November 1869
- To F. C. Donders 17 November [1869]
- From John Murray 17 November 1869
- From Albert Hugh Jones 17 November 1869
- To ? 17 November [1870]
- From Camille Dareste 18 November [1869]
- From Roland Trimen 18 November 1869
- To Christian Gottfried Ehrenberg 18 November [1869]
- To J. D. Hooker 19 November [1869]
- To J. J. Moulinié 20 November 1869
- To J. V. Carus 20 November 1869
- To George Cupples 20 November [1869]
- To Camille Dareste 20 November 1869
- From J. D. Hooker 21 November 1869
- From Charles Layton 22 November 1869
- From George Henslow 22 November 1869
- From George Bentham 23 November 1869
- To J. D. Hooker 24 November [1869]
- To Charles Layton 24 November [1869]
- From A. B. Meyer 24 November 1869
- From Charles Layton 25 November 1869
- From Charles Boner 25 November [1869]
- To George Bentham 25 November [1869]
- From George Bentham 26 November 1869
- To Charles Layton 26 November [1869]
- To T. H. Farrer [27 November 1869]
- To A. B. Meyer 27 November [1869]
- From T. H. Farrer 28 November 1869
- From C. S. Bate 29 November 1869
- From Charles Boner [December 1869 – early January 1870]
- To Fritz Müller 1 December [1869]
- From A. R. Wallace 4 December [1869]
- To A. R. Wallace 5 December [1869]
- To Francis Darwin 5 December [1870]
- DCP-LETT-7022
- From E. A. Darwin 7 December [1869]
- From John Lubbock 8 December [1869]
- From C. S. Bate 11 December 1869
- From Francis Galton 11 December 1869
- From J. T. Moggridge 12 December 1869
- From Camille Dareste 13 December [1869]
- To ? 13 December [1869]
- From Fritz Müller 18 December 1869
- From John Scott 21 December 1869
- From James Leask Sinclair to John Murray 22 December 1869
- To Francis Galton 23 December [1869]
- From Charles Layton 23 December 1869
- From Francis Galton 24 December 1869
- To Anton Dohrn 25 December 1869
- From W. W. Reade 26 December 1869
- From L. E. Becker 29 December 1869
- From Anton Dohrn 30 December 1869
- From J. L. Sinclair 31 December 1869
- From W. E. Darwin [c. 17 February 1870]
- From Hensleigh Wedgwood [1868–70?]
- From Hensleigh Wedgwood [1867–72]
- From Hensleigh Wedgwood [1867–72]
- From Hensleigh Wedgwood [1867–72?]
- To Mary Charlotte Lloyd [24 July 1869]
- From Francis Trevelyan Buckland [1865–6]
- From G. H. Darwin [20 April 1870]
- From E. A. Darwin [September 1868 – August 1870]
- From W. E. Darwin [April 1871?]
- To [Edward William Blore] [October 1870 or later]
- To John Murray [after 1 July 1870]
- To Edward Alfred Smith [before 30 June 1869]
- To Edward Alfred Smith [11–31 March 1868]
- From Anne Jane Cupples [28 November 1870]
- DCP-LETT-7054
- From Federico Delpino [1870]
- From S. P. Engleheart [October 1869 or later]
- To John Lubbock [1871 or later]
- From F. J. Wedgwood to H. E. Darwin [1867–72]
- From F. J. Wedgwood to H. E. Darwin [1867–72]
- From F. J. Wedgwood [1867–72]
- From F. J. Wedgwood to H. E. Darwin? [1867–72]
- From F. J. Wedgwood [1867–72]
- From L. C. Wedgwood [January 1871]
- DCP-LETT-7064
- From Ellen Frances Lubbock [1867–8?]
- DCP-LETT-7065F
- From E. A. Darwin 19 [December 1870]
- From E. A. Darwin 21 [December 1870]
- From Charles Ottley Groom Napier January 1870
- From William Winwood Reade [c. 8 or 9 April 1870]
- To Anton Dohrn 4 January 1870
- DCP-LETT-7071
- To Abraham Dee Bartlett 5 January [1870]
- To Charles Boner [before 8 January 1870]
- From Charles Boner 8 January 1870
- From Adolf Reuter 11 January 1870
- From Anton Dohrn 13 January 1870
- To Albert Günther 13 January [1870]
- From Albert Günther [after 13 January 1870]
- To Adolf Reuter 15 January [1870]
- To Albert Günther 16 January [1870]
- To Richard Kippist 16 January [1870 or 1871]
- From Henry Walter Bates 17 January 1870
- To Charles Boner 20 January [1870]
- From Thomas Henry Huxley 21 January 1870
- From Alfred Russel Wallace 22 January 1870
- To A. R. Wallace 26 January [1870]
- From John Brodie Innes 28 January 1870
- From William Turner 3 January 1870
- To ? [1870s?]
- To James Crichton-Browne 31 January [1870]
- From George Howard Darwin [1 February 1870 or earlier]
- From G. H. Darwin [3 February 1870 or earlier]
- DCP-LETT-7092
- From D. Appleton & Co. to Asa Gray 1 February 1870
- From Mary Susan Mostyn Owen 2 February [1870]
- From Robert Swinhoe 2 February 1870
- From G. H. Darwin [4 February 1870]
- To the American Philosophical Society 5 February 1870
- From M. S. Mostyn Owen 7 February [1870]
- From Berry Benson 9 February 1870
- To Alfred Newton 9 February [1870]
- From George P. Bissell 10 February 1870
- From Robert Swinhoe 10 February 1870
- From Alfred Newton 11 February 1870
- From Jane Loring Gray 14 February 1870
- From Asa Gray 14 February 1870
- From Edward Caldwell Rye 14 February 1870
- From W. D. Fox 15 February [1870]
- From Fritz Müller 16 February 1870
- From William Swale 16 February [1870?]
- From William Thierry Preyer [before 17 February 1870]
- To Gustav Jäger 17 February 1870
- To W. T. Preyer 17 February [1870]
- From H. E. Darwin [after 8 February 1870]
- To W. D. Fox 18 February [1870]
- From Vladimir Onufrievich Kovalevsky 20 February [1870]
- To J. D. Hooker 21 February [1870]
- To Robert Garner 22 February [1870–1]
- To James Orton 24 February [1870]
- To John Lubbock 26 February [1870]
- From John Lubbock 27 February [1870]
- From Asa Gray 27 February and 1 March 1870
- From Federico Delpino 28 February 1870
- From V. O. Kovalevsky 28 February [1870]
- From Hensleigh Wedgwood [March 1870]
- To H. E. Darwin [March] 1870
- To Henrietta Emma Darwin [8 February 1870]
- From Charles Edward Cutts Birchall Appleton 2 March [1870]
- From George Henslow 3 March 1870
- DCP-LETT-7126F
- From L. C. Wedgwood to Elizabeth Darwin [7 March 1872 or later]
- To A. R. Wallace 7 March [1870?]
- To J. D. Hooker 8 March [1870]
- From St George Jackson Mivart 8 March [1870]
- From Hermann Müller 8 March 1870
- To Hermann Müller 14 March 1870
- To Asa Gray 15 March [1870]
- From Francis Galton 15 March 1870
- From James Crichton-Browne 15 March 1870
- To Edwin Ray Lankester 15 March [1870]
- From R. F. Albrecht 16 March 1870
- From John Jenner Weir 17 March 1870
- To J. J. Weir 17 March [1870]
- From Francis Galton 17 March 1870
- From Georg Recht 17 March 1870
- From F. C. Donders 17 May 1870
- To James Crichton-Browne 18 March 1870
- To R. F. Albrecht 18 March 1870
- From Francis Galton 22 March 1870
- From Albert Günther [c. 9 April 1870]
- To Frances Power Cobbe 23 March [1870?]
- To Albert Günther 23 March [1870]
- To ? 23 March [1870–1]
- To W. H. Flower 25 March [1870]
- From F. P. Cobbe 28 March [1870?]
- From Fritz Müller 29 March 1870
- To Thomas Guthrie? 30 March [1871]
- From Armand de Quatrefages 30 March 1870
- From H. E. Darwin [30 March 1870]
- To A. R. Wallace 31 March [1870]
- From Frederic Bateman 31 March [1871]
- From Francis Galton 31 March 1870
- From James Orton 31 March 1870
- From G. H. Darwin [2 December 1869]
- From Erasmus Alvey Darwin 1 April [1870?]
- To James Crichton-Browne 2 April [1870]
- From Francis Galton 8 April 1870
- To John Murray 9 April [1870]
- From Charles Warren Stoddard 11 April 1870
- From Albert Günther 12 April 1870
- From Julius Victor Carus 16 April [1870]
- From J. V. Carus 18 April 1870
- To Rudolf Albert von Kölliker 18 April [1870]
- To A. R. Wallace 20 April [1870]
- From George Rolleston 20 April 1870
- To Tord Tamerlan Teodor Thorell 20 April 1870
- From Giovanni Canestrini 21 April 1870
- From St G. J. Mivart 22 April 1870
- To St G. J. Mivart 23 April [1870]
- From W. W. Reade 24 April 1870
- From St G. J. Mivart 25 April 1870
- From Lucy Caroline Wedgwood [25 April 1870]
- From Francis Galton 26 April 1870
- To Francis Galton [27 April 1870?]
- From George Cupples 29 April 1870
- To Ferdinand Vandeveer Hayden 2 May [1870]
- From L. C. Wedgwood [5 May 1870]
- To C. W. Stoddard 5 May [1870]
- From W. T. Preyer 9 May 1870
- From H. H. Vivian 10 May 1870
- To H. H. Vivian 11 May [1870]
- To Fritz Müller 12 May 1870
- From Francis Galton 12 May 1870
- To Albert Günther 12 May [1868]
- To Frans Cornelis Donders 13 May [1870]
- To Thomas Henry Farrer 13 [May 1870]
- From Patrick Nicol 13 May 1870
- To W. T. Preyer 15 May 1870
- To Albert Günther 15 May [1868]
- DCP-LETT-7191F
- From T. H. Farrer 17 May 1870
- From C. E. C. B. Appleton 18 May [1870]
- To F. C. Donders 19 May 1870
- From Charles Renard 20 May 1870
- From Federico Delpino 20 May 1870
- From H. W. Bates 20 May 1870
- From J. D. Hooker [22 May 1870]
- To Alfred Newton [22 May 1870]
- To J. D. Hooker 25 May [1870]
- From James Philip Mansel Weale [25 May 1870]
- To E. P. Wright 25 May [1870]
- From T. H. Farrer 26 May 1870
- From F. C. Donders 27 May 1870
- To Armand de Quatrefages 28 May [1870]
- To T. H. Farrer 28 May [1870]
- To Charles Renard 28 May 1870
- From F. C. Donders 28 May 1870
- DCP-LETT-7208
- From Adam Sedgwick 30 May 1870
- To J. D. Hooker [13 June 1870?]
- From T. W. Wood [after 26 June 1870]
- From Francis Galton 1 June 1870
- To Federico Delpino 1 June [1870]
- To Adam Sedgwick 1 June [1870]
- To J. D. Hooker 2 [June 1870]
- To F. C. Donders 3 June [1870]
- From W. W. Reade 4 June 1870
- To James Paget 4 June [1870]
- To A. R. Wallace 5 [July 1870]
- From T. H. Farrer 5 June 1870
- From James Crichton-Browne 6 June 1870
- From James Crichton-Browne [6 June 1870]
- From Robert Cecil 7 June 1870
- To L. C. Wedgwood 8 June [1867–72]
- To James Crichton-Browne 8 June [1870]
- From Benjamin Collins Brodie 9 June 1870
- From John Murray 10 June [1870]
- From St G. J. Mivart 11 June 1870
- From David Forbes 13 June 1870
- To St G. J. Mivart 13 June [1870]
- From Thomas W. Wood 14 June 1870
- To R. A. von Kölliker 14 June 1870
- To J. J. Weir 14 June [1870]
- From F. V. Hayden 14 June 1870
- To ? 14 June [1870]
- From Louis Rérolle 15 June 1870
- From T. W. Wood 16 June 1870
- From Joachim Barrande 19 June 1870
- From George Cupples 20 June 1870
- To F. C. Donders 21 June 1870
- From T. H. Huxley 22 June 1870
- From Louis Rérolle 22 June 1870
- From John and Emma Pender [before 23 June 1870]
- To Ernst Haeckel 23 June [1870]
- From Hermann Hoffmann 23 June 1870
- From Osbert Salvin 24 June 1870
- To Edward Burnett Tylor 25 June 1870
- From Francis Galton 25 June 1870
- To Frederick Bates 26 June [1870?]
- From Bartholomew James Sulivan 27 June 1870
- From J. J. Weir 27 June 1870
- From William Robson Scott to E. B. Tylor 28 June 1870
- From Francis Galton 28 June 1870
- To T. H. Farrer [29 June 1870]
- To J. D. Hooker [29 June 1870]
- From E. C. Rye 29 June 1870
- To J. J. Weir 29 June [1870]
- From T. H. Farrer 29 June 1870
- To W. W. Reade 30 June [1870]
- To B. J. Sulivan 30 June [1870]
- To [Henry Hussey Vivian?] [April or May 1870?]
- From J. D. Hooker 1 July 1870
- From John Murray 1 July 1870
- From B. J. Sulivan 1 July 1870
- To J. D. Hooker 2 July [1870]
- From Camille Dareste 2 July 1870
- To B. J. Sulivan 2 July [1870]
- From J. J. Weir 4 July 1870
- To Friedrich Hildebrand 4 July 1870
- To John Murray 5 [August 1870]
- To W. H. Flower 5 July 1870
- From J. D. Hooker [6 or 7 July 1870]
- From Ernst Haeckel 6 July 1870
- From A. R. Wallace 6 July 1870
- From George Green Gascoyen 7 July 1870
- To J. D. Hooker 8 July [1870]
- From J. D. Hooker 10 July 1870
- To J. D. Hooker 12 July [1870]
- From William Bernhard Tegetmeier 14 July 1870
- To W. B. Tegetmeier 15 July [1870]
- To Albert Günther 15 July [1870]
- From John Lubbock 16 July [1870]
- From Friedrich Hildebrand 16 July 1870
- From William Farr 16 July 1870
- To W. W. Baxter 16 July [1872?]
- To John Lubbock 17 July 1870
- To William Farr 17 July [1870]
- From Armand de Quatrefages 18 July 1870
- From Arthur Gardiner Butler 19 July 1870
- To Armand de Quatrefages 20 July [1870]
- To Armand de Quatrefages 21 July [1870]
- To John Lubbock 21 July [1870]
- From John Lubbock 23 July [1870]
- From John Lubbock 26 July [1870]
- To Richard Kippist 28 July [1870]
- To J. P. M. Weale 30 July 1870
- From David Forbes 30 July 1870
- To David Forbes 31 July [1870]
- From Henry Bence Jones 2 August 1870
- To H. B. Jones 3 August [1870]
- From Paul Broca 4 August 1870
- From John Murray 6 August [1870]
- From William Farr 6 August 1870
- From V. O. Kovalevsky 7 August [1870]
- To Mr Dorrell 9 August 1870
- From Lewis Henry Morgan 9 August 1870
- To Mr Dorrell 11 August [1870]
- To L. H. Morgan 11 August [1870]
- From E. A. Darwin 15 August [1859 or later]
- From V. O. Kovalevsky 15 August [1870]
- From Charles Lawford Acland 17 August 1870
- To Jean Jacques Moulinié 18 August 1870
- To J. V. Carus 18 August 1870
- To F. P. Cobbe 20 August [1870]
- From William Johnson Raybould to Abraham Dee Bartlett 22 August 1870
- To Armand de Quatrefages 23 August [1870]
- To George F. Kittredge 24 August [1870]
- To Fritz Müller 28 August 1870
- To Philip Lutley Sclater 30 August [1870]
- To Francis Darwin 30 August [1867–70]
- From D. Appleton & Co. to Asa Gray 1 September 1870
- From Sofia Vasilyevna Kovalevskaya and V. O. Kovalevsky 1 September 1870
- From W. W. Reade 3 September 1870
- To John Murray 4 September [1870]
- From V. O. Kovalevsky 5 September [1870]
- From John Tyndall 7 September 1870
- To John Tyndall 8 September 1870
- From V. O. Kovalevsky 15 September 1870
- From George Cupples 17 September 1870
- To J. D. Hooker 17 September 1870
- From V. O. Kovalevsky 20 September 1870
- To George Cupples 20 September [1870]
- From J. D. Hooker 24 September 1870
- From Edward Livingston Youmans 25 September 1870
- From E. L. Youmans 25 September 1870
- From Alexander Onufrievich Kovalevsky 25 September 1870
- To John Murray 26 September 1870
- To J. D. Hooker 27 September [1870]
- From John Murray 28 September [1870]
- To Hermann Settegast 29 September 1870
- To John Murray 29 September [1870]
- From J. V. Carus 2 October 1870
- To J. V. Carus 5 October [1870]
- From V. O. Kovalevsky 5 October 1870
- To Robert Main 6 October 1870
- From Charles Wyville Thomson 7 October 1870
- To C. W. Thomson 10 October 1870
- From George Cupples 8 October 1870
- From Hermann Hoffmann 8 October 1870
- From John Murray 10 October [1870]
- To J. V. Carus 11 October [1870]
- To John Murray 11 October [1870]
- From V. O. Kovalevsky 11 October [1870]
- From J. D. Hooker 12 October 1870
- To J. D. Hooker 14 October [1870]
- From L. C. Wedgwood [15 June 1872?]
- From Francis Darwin [before 18 October 1870]
- To Francis Darwin 18 October [1870]
- From Francis Darwin [after 18 October 1870]
- From John Gage 19 October 1870
- To John Murray 22 October [1870]
- From Alexander Agassiz 22 October 1870
- From John Murray 24 October [1870]
- From T. H. Farrer 27 October 1870
- From S. A. Merrell 28 October 1870
- From W. D. Fox 28 October [1870]
- DCP-LETT-7354
- To George Cupples 3 November [1870]
- To P. L. Sclater 4 November [1870]
- From Henry Holland 4 November [1870]
- From Worthington George Smith 4 November 1870
- From W. W. Reade 6 November 1870
- To W. G. Smith 6 November 1870
- From Thompson Forster 8 November 1870
- From William Ogle [before 9 November 1870]
- To P. L. Sclater 9 November 1870
- From W. W. Reade 9 November 1870
- To William Ogle 9 November 1870
- From William Ogle [10–17 November 1870]
- To P. L. Sclater 11 November [1870]
- From W. W. Reade 11 November 1870
- From Jacob Heinrich Schmick 12 November 1870
- From George Cupples 14 November 1870
- To W. D. Fox 15 November [1870]
- To John Murray 15 November [1870]
- From John Murray 16 November [1870]
- To William Ogle 17 November [1870]
- To John Murray 17 November [1870]
- From John Dean Caton 17 November 1870
- From W. D. Fox 18 [November 1870]
- From L. C. Wedgwood 20 November [1871]
- From Asa Gray 21 November 1870
- To P. L. Sclater 21 November [1870]
- To A. R. Wallace 22 November [1870]
- From V. O. Kovalevsky 22 November 1870
- From A. R. Wallace 24 November 1870
- To George Cupples 27 November [1870]
- From Hermanus Hartogh Heijs van Zouteveen 27 November 1870
- To A. S. Strahan 29 November 1870
- From Charles Anthoni Johnson Brooke 30 November 1870
- To Hermanus Hartogh Heijs van Zouteveen 30 November [1870]
- DCP-LETT-7386B
- From Robert Francis Cooke 5 December 1870
- To P. L. Sclater 5 December 1870
- From Francis Darwin [before 5 December 1870]
- From Francis Darwin [before 5 December 1870]
- To Asa Gray 7 December 1870
- From V. O. Kovalevsky 12 December [1870]
- From Lambert Adolphe Jacques Quetelet 15 December 1870
- From T. H. Farrer 15 December 1870
- To L.-G. De Koninck [after 19 December 1870]
- To L. A. J. Quetelet [after 15 December 1870]
- To William Ogle 17 December [1870]
- From B. J. Sulivan 17 December 1870
- From Edouard van Beneden 17 December 1870
- From William Ogle [after 17 December 1870]
- From Laurent-Guillaume De Koninck 19 December 1870
- From W. W. Reade 20 December 1870
- To B. J. Sulivan 20 December [1870]
- To Charles Lyell 25 December [1870]
- To P. L. Sclater 26 December [1870]
- To ? 28 December [1870]
- To P. L. Sclater 29 December [1870]
- To John Phillips [November–December 1871?]
- From Leonard Darwin [after 4 March 1871]
- From Hensleigh Wedgwood [21 March 1871]
- From James Anderson [after 24 February 1871?]
- From C. L. Balch [after 15 April 1871]
- From Lawrence Ruck [after 29 April 1869?]
- From Emma Darwin to V. L. Isitt [before 17 September 1871]
- From E. J. Pfeiffer [before 26 April 1871]
- From Henry Holland [16 December 1871]
- From Charles Langstaff [after 22? April 1868]
- From William Turner [1871?]
- From Alexander Agassiz [before 1 June 1871]
- DCP-LETT-7416
- DCP-LETT-7417
- From O. G. Rejlander [1871]
- From E. F. Lubbock [after 24 February 1871]
- From Francis Darwin [before 22 April 1871?]
- DCP-LETT-7421
- From H. F. H. Elliot to G. H. Darwin [before 11 March 1873?]
- DCP-LETT-7423
- From ? [1872–4]
- To Francis Darwin [after 21 January 1871]
- From Francis Wedgwood to Emma Darwin [before 4 January 1871]
- To P. L. Sclater 4 January [1871]
- From Francis Wedgwood 4 January 1871
- From W. W. Reade 6 January [1871]
- To ? 6 January [1873 or 1874]
- From Federico Delpino 7 January 1871
- From A. F. Boardman 8 January 1871
- From Francis Galton 9 January 1871
- From Francis Wedgwood 9 January 1871
- To Richard Kippist 10 January [1870 or 1871]
- From W. W. Reade 10 January 1871
- From R. F. Cooke 11 January 1871
- From L. A. J. Quetelet 11 January 1871
- To R. F. Cooke 12 January [1871]
- To J. B. Innes 13 January 1871
- From R. F. Cooke 13 January 1871
- To R. F. Cooke 14 January [1871]
- From V. O. Kovalevsky 15 January [1871]
- To Arthur Hough 15 January [1872–4]
- From W. W. Reade 16 January 1871
- To R. F. Cooke 17 January [1871]
- To J. B. Innes 18 January [1871]
- To A. R. Wallace 18 January [1871]
- From St G. J. Mivart 19 January 1871
- To J. D. Hooker 21 January [1871]
- From J. B. Innes 21 January 1871
- To Albert Günther 21 January [1871]
- To St G. J. Mivart 21 January [1871]
- From St G. J. Mivart 22 January 1871
- To William Bowman [before 26] January [1871]
- To St G. J. Mivart [23 January 1871]
- To St G. J. Mivart 23 January [1871]
- From St G. J. Mivart 24 January 1871
- To J. B. Innes 26 January [1871]
- From William Bowman 26 January 1871
- From J. V. Carus 26 January 1871
- From St G. J. Mivart 26 January 1871
- To Erasmus Wilson [26 January – 3 February 1871]
- To St G. J. Mivart 26 January [1871]
- From A. R. Wallace 27 January 1871
- To George King 27 January [1871]
- To W. S. Dallas 27 January [1871]
- To Raphael Meldola 28 January [1871]
- To St G. J. Mivart 28 January [1871]
- From V. O. Kovalevsky 29 January 1871
- To A. R. Wallace 30 January [1871]
- To J. V. Carus 30 January 1871
- To R. F. Cooke 30 January [1871]
- To G. H. Darwin 30 January [1874?]
- From St G. J. Mivart 31 January 1871
- From W. W. Reade 31 January 1871
- From W. E. Darwin [29 February 1872]
- From Hensleigh Wedgwood [before 3 March 1871]
- To J. D. Hooker 1 February [1871]
- From C.-F. Reinwald 1 February 1871
- From W. W. Reade 1 February 1871
- From R. F. Cooke 3 February 1871
- From Erasmus Wilson 3 February 1871
- To Asa Gray 5 February [1871]
- From W. E. Darwin 6 February 1871
- From W. B. Dawkins 8 February 1871
- To James Crichton-Browne 8 February 1871
- From Felice Finzi 9 February 1871
- From Thomas Meehan 10 February 1871
- To R. F. Cooke 10 February [1871]
- To R. F. Cooke 14 February [1871]
- To J. V. Carus 15 February [1871]
- From R. F. Cooke 15 February 1871
- From James Crichton-Browne 16 February 1871
- To Hermanus Hartogh Heijs van Zouteveen 16 February 1871
- From J. V. Carus 17 February 1871
- From John Murray 18 February [1871]
- From David Forbes 18 February 1871
- From V. O. Kovalevsky 18 February 1871
- To John Murray 19 February [1871]
- From W. E. Darwin [19 February 1871]
- From Henry Holland 19 February [1871]
- From G. R. Crotch 19 [February 1871]
- From James Crichton-Browne 19 February 1871
- To J. J. Moulinié 20 February [1871]
- From T. H. Huxley 20 February 1871
- From C. C. Blake 20 February 1871
- From John Murray 20 February [1871]
- From Thomas Woolner 20 February 1871
- From Robert McLachlan 20 February 1871
- To James Crichton-Browne 20 February [1871]
- To Hermanus Hartogh Heijs van Zouteveen 21 February 1871
- From W. W. Reade 21 February 1871
- From George Cupples 21 February 1871
- From William Farr 21 February 1871
- From F. W. Farrar 21 February [1871]
- From W. D. Fox 21 February [1871]
- From George Rolleston 22 February 1871
- From John Murray 23 February [1871]
- From John Tyndall 23 February [1871]
- From W. B. Dawkins 23 February 1871
- To John Murray 23 February 1871
- From Ernst Haeckel 24 February 1871
- To P. L. Sclater [24 February 1871]
- From Julius Sachs 24 February 1871
- To A. R. Wallace [23 November 1866?]
- To ? 25 February [1871]
- From William Ogle 25 February [1871]
- From C. L. Bernays 25 February 1871
- From Andrew Smith 26 February 1871
- From Emma Darwin to F. P. Cobbe [25 February 1871]
- To R. F. Cooke 26 February [1871]
- To John Tyndall [27 February 1871]
- From John Murray 27 February [1871]
- From Anton Dohrn 28 February 1871
- To Francis Darwin [28 February 1871]
- From George Rolleston [after 22 February 1871]
- From Frank Chance [before 25 April 1871]
- From W. B. Tegetmeier [after 25 April 1871]
- To John Tyndall 1 March [1871]
- To John Tyndall 1 March [1871]
- From J. J. Aubertin 1 March 1871
- From John Tyndall 1 March [1871]
- From T. H. Farrer 1 March 1871
- From Hermanus Hartogh Heijs van Zouteveen [before 21 February 1871]
- To T. H. Farrer 2 [March 1871]
- From James Murie 2 March 1871
- From W. R. Greg 2 March [1871?]
- From Hermanus Hartogh Heijs van Zouteveen 2 March 1871
- To Ernst Haeckel 3 March 1871
- To Joseph Wolf 3 March 1871
- From A. F. Baillie 3 March 1871
- To Hensleigh Wedgwood 3 March [1871]
- From J. J. Moulinié 3 March 1871
- To J. J. Aubertin 3 March [1871]
- From Herbert Spencer 3 March 1871
- From T. H. Farrer 3 March 1871
- From Hensleigh Wedgwood [3–9 March 1871]
- To F. du C. Godman 4 March [1871]
- To the Linnean Society 4 March [1871]
- From J. J. Aubertin 4 March 1871
- From W. W. Reade 4 March 1871
- From William Johnson 5 March 1871
- To Hermanus Hartogh Heijs van Zouteveen 5 March [1871]
- From J. F. McLennan 6 March 1871
- To J. J. Moulinié 7 March [1871]
- To William Ogle 7 March [1871]
- To John Tyndall 7 March [1871]
- From Arthur Nicols 7 March 1871
- To John Tyndall 8 March [1871]
- To John Murray 8 March [1871]
- To Arthur Nicols [8–10 March 1871]
- From John Tyndall 8 March [1871]
- From Alphonse de Candolle 8 March 1871
- From Emile Alglave 9 March 1871
- From John Murray 9 March [1871]
- To Hensleigh Wedgwood 9 March 1871
- From G. H. Darwin [3–9 March 1871]
- From Hensleigh Wedgwood [after 9 March 1871]
- From George Busk 10 March 1871
- From G. B. Murdoch 10 March 1871
- From Francis Darwin [after 4 March 1871]
- From R. M. Kettle 10 March [1871]
- To G. B. A. Duchenne about 10 March [1871]
- From Asa Gray 10 and 14 March [1871]
- To Frederick Currey 11 March 1871
- From A. R. Wallace 11 March 1871
- From Arthur Nicols 11 March 1871
- From B. J. Sulivan 11 March 1871
- From John Jeremiah 11 March 1871
- From F. S. B. F. de Chaumont to W. E. Darwin 11 March 1871
- To George Busk 12 March [1871]
- To William Ogle 12 March [1871]
- From Patrick Matthew 12 March 1871
- To John Murray 13 March 1871
- To G. B. Murdoch 13 March 1871
- To B. J. Sulivan 13 March [1871]
- To A. R. Wallace 13 March [1871]
- From Robert Swinhoe 14 March 1871
- From W. R. Greg 14 March [1871]
- From F. C. Donders 14 March 1871
- From V. O. Kovalevsky 14 March 1871
- DCP-LETT-7584
- To Patrick Matthew 15 March [1871]
- From J. V. Carus 15 March 1871
- From A. R. Wallace [15 March 1871]
- To R. H. Blair [before 16 March 1871]
- To A. R. Wallace 16 March 1871
- From R. H. Blair 16 March 1871
- From George Busk 16 March 1871
- From Emile Alglave 17 March 1871
- From Lewin Hill 17 March 1871
- To T. R. R. Stebbing 18 March [1871]
- To F. C. Donders 18 March 1871
- To William Ogle 18 March [1871]
- From John Murray 18 March [1871]
- From John Lubbock 18 March [1871]
- From George Morrish 18 March 1871
- From J. D. Hooker 19 March 1871
- From Edwin Brown 19 March 1871
- From George Thin to Alexander Michie 19 March 1871
- To John Murray 20 March 1871
- From John Murray 20 March [1871]
- To H. E. Darwin 20 March 1871
- From H. E. Darwin 21 March [1871]
- From H. E. Darwin to Emma Darwin [March 1871]
- To Pieter Harting 21 March 1871
- To J. D. Hooker 21 March [1871]
- To John Murray 21 March 1871
- To W. R. Greg 21 March [1871]
- To John Murray 22 March [1871]
- From John Murray 22 March 1871
- To E. R. Lankester 22 March [1871]
- To John Murray 23 March 1871
- To Lewin Hill 23 March [1871]
- From R. H. Tiddeman 23 March 1871
- To P. B. Mason 24 March [1871]
- To A. R. Wallace 24 March [1871]
- DCP-LETT-7617
- To E. S. Newall? 24 March 1871
- From J. F. McLennan 24 March 1871
- DCP-LETT-7619
- To Annie Dowie 24 March 1871
- To Frederick Greenwood 24 March [1871]
- To William Ogle 25 March [1871]
- From G. B. A. Duchenne 25 March 1871
- From M. B. Bathoe 25 March [1871]
- From Mary Charlton 25 March 1871
- To Francis Darwin 25 March [1871]
- From J. D. Hooker 26 March 1871
- From John Morley 26 March 1871
- To A. D. Kindermann [27 March 1871]
- To J. D. Hooker 28 March [1871]
- To William Ogle 28 [March 1871]
- To William Turner 28 March [1871]
- From Harrison Weir 28 March 1871
- From F. C. Donders 28 March 1871
- To James Crichton-Browne 28 March [1871]
- DCP-LETT-7636
- From William Turner [after 28 March 1871]
- To William Turner 29 March [1871]
- To Erasmus Wilson 29 March [1871]
- To G. B. A. Duchenne 29 March [1871]
- From P. B. Mason 29 March 1871
- From J. M. Fleming 29 March 1871
- From James Crichton-Browne 29 March 1871
- From Anne Barnard 30 March 1871
- From John Morley 30 March 1871
- To Anne Barnard 31 March [1871]
- To P. B. Mason 31 March [1871]
- From Edouard van Beneden 31 March 1871
- From James Crichton-Browne [29–31 March 1871]
- To Frederic Harrison 1 April [1871]
- From F. J. Wedgwood to H. E. Darwin 1 April 1871
- To F. J. Wedgwood [after 1 April 1871?]
- From J. E. Gray 2 April 1871
- From E. B. de Fonblanque 2 April 1871
- From A. F. Boardman 3 April 1871
- From C. M. C. Darwin 3 April 1871
- From J. E. Gray 3 April 1871
- From Hubert Airy 3 April 1871
- From James Crichton-Browne 3 April 1871
- To Hubert Airy 5 April [1871]
- From David Wedderburn 6 April 1871
- From John Wood 6 April 1871
- To John Le Couteur 6 April [1871]
- From Francis Galton to Francis Darwin 7 April 1871
- From J. E. Gray 7 April 1871
- From Hermanus Hartogh Heijs van Zouteveen 7 April 1871
- To Thomas Woolner 7 April [1871]
- To James Crichton-Browne 7 April [1871]
- From Emma Darwin to F. P. Cobbe [7 April 1871]
- To J. P. Knight 8 April 1871
- From G. F. Ansell 8 April 1871
- From Napoleon de la Fleurière 8 April [1871]
- To Louisa Stevenson 8 April 1871
- To J. E. Gray 9 April [1871]
- From Francis Galton 9 April [1871]
- To James Crichton-Browne 9 April [1871]
- From J. N. Hoare 10 April 1871
- From John Wood 11 April 1871
- From R. M. Kettle 11 April [1871]
- From John Murray 12 April [1871]
- From George Fraser 12 April 1871
- To James Crichton-Browne 12 April 1871
- To William Ogle 13 April [1871]
- To John Murray 13 April [1871]
- From George Fraser 13 April 1871
- To Francis Galton 14 April [1871]
- From Asa Gray 14 April 1871
- To George Fraser 14 April [1871]
- From Emma Darwin to F. P. Cobbe [14 April 1871]
- To John Morley 14 April [1871]
- From Eduard Koch 14 April 1871
- From Arthur Nicols 15 April 1871
- To C. L. Balch 15 April 1871
- From F. S. B. F. de Chaumont to W. E. Darwin 16 April 1871
- From James Crichton-Browne 16 April 1871
- To J. N. Hoare 16 April [1871]
- To Michael Foster 16 April 1871
- From Hugh Browne 17 April [1871]
- From John Morley 17 April 1871
- From Roland Trimen 17 and 18 April 1871
- From E. R. Lankester 17 April [1871]
- From Andrew Smith 17 April 1871
- From Hermann Hoffmann 17 April 1871
- To Bartholomäus von Carneri 17 April [1871]
- From Hugh Browne June 1871
- From Hinrich Nitsche 18 April 1871
- To James Crichton-Browne 18 April 1871
- From John Wood 19 April 1871
- From T. G. Cresy 19 April 1871
- From W. R. Greg 19 April [1871]
- To Hermann Hoffmann 20 April [1871]
- From H. M. Westropp 20 April [1871]
- To St G. J. Mivart 21 April [1871]
- From Louisa Albano 22 April 1871
- To R. F. Cooke 22 April [1871]
- To H. M. Westropp 22 April [1871]
- From George Cupples 22 April 1871
- From J. V. Carus 22 April 1871
- To Francis Darwin 22 April [1871?]
- To John Murray 23 April [1871]
- From St G. J. Mivart 23 April 1871
- To Elliott & Fry 23 April [1871]
- From T. W. Wood 24 April 1871
- From W. B. Tegetmeier [before 25 April 1871]
- To W. B. Tegetmeier 25 April [1871]
- To Hinrich Nitsche 25 April [1871]
- To J. V. Carus 25 April [1871]
- From F. T. Köppen 25 April 1871
- From Francis Galton 25 April 1871
- To Henry Johnson 25 April [1871?]
- To St G. J. Mivart 21 April [1870]
- From R. F. Cooke 26 April 1871
- To E. J. Pfeiffer 26 April [1871]
- To Nature [before 27 April 1871]
- From William Preyer 27 April 1871
- From R. I. Thompson 27 April 1871
- To Williams & Norgate 27 April [1871]
- To F. T. Köppen 28 April [1871]
- From R. F. Cooke 28 April 1871
- From Williams & Norgate 28 April 1871
- To William Ogle 29 April [1871]
- To E. B. Tylor 30 April [1871]
- From O. G. Rejlander 30 April 1871
- To William Preyer 30 April 1871
- From J. D. Hooker 30 April [1872]
- From C. A. J. Brooke 30 April 1871
- DCP-LETT-7730
- From C. W. Peach 1 May 1871
- From C. H. Brett 1 May 1871
- From Francis Galton 2 May 1871
- From Herbert Spencer 2 May 1871
- To V. O. Kovalevsky 3 May 1871
- From Henry Lonsdale 3 May 1871
- From Charles Langstaff 3 May 1871
- DCP-LETT-7738
- To G. R. Jesse 4 May [1871]
- From M. T. Masters 6 May 1871
- From Luigi Pomba 6 May 1871
- From George Hookham 6 May [1873]
- From F. S. B. F. de Chaumont to W. E. Darwin 7 May 1871
- To R. F. Cooke 8 May 1871
- From William Preyer 8 May 1871
- To M. T. Masters 9 May [1871]
- To ? 10 May [1871]
- To Luigi Pomba 10 May 1871
- To John Murray 10 May [1871]
- From John Murray 10 May 1871
- From J. W. Spengel 10 May 1871
- From V. O. Kovalevsky 10 May 1871
- From F. E. Abbot 11 May 1871
- From Francis Galton 12 May 1871
- To John Murray 12 May [1871]
- To William Preyer 13 May 1871
- From G. H. Darwin [14 May 1871]
- From A. R. Wallace 14 May 1871
- To Gustav Lindström 16 May [1871]
- From Andrew Smith 16 May 1871
- To Francis Darwin 16 May [1871]
- From Francis Darwin [after 16 May 1871]
- From Francis Darwin [after 22 May 1871]
- To V. O. Kovalevsky 17 May [1871]
- To F. W. Farrar 19 May [1871]
- From Joseph Cundall to R. F. Cooke 19 May 1871
- To Francis Darwin 21 May [1871]
- To H. W. Bates [22 May 1870]
- From Francis Darwin [after 22 May 1871]
- To Alexander Buchan 22 May [1871]
- From V. O. Kovalevsky 23 May [1871]
- From Henry Reeks 25 May 1871
- From J. B. Innes 26 May 1871
- From John Murray 26 May [1871]
- From A. G. Butler 26 May 1871
- To F. E. Abbot 27 May [1871]
- To John Murray 27 May [1871]
- To R. F. Cooke 28 May [1871]
- From J. V. Carus 28 May 1871
- From V. O. Kovalevsky 28 May [1871]
- To J. B. Innes 29 May [1871]
- From Henry Gillman 29 May 1871
- From Alfred Newton 29 May 1871
- To C. L. Balch 29 May 1871
- DCP-LETT-7779
- To J. V. Carus 30 May 1871
- To Alfred Newton 30 May [1871]
- From Henry Reeks 30 May 1871
- From J. B. Holder 30 May 1871
- From John Murray 31 May [1871]
- From E. M. Bonham-Carter to H. E. Darwin [23 June 1871]
- From E. M. Bonham-Carter to Emma Darwin? [2–5 June 1871]
- From J. W. Strutt [after 20 May 1871?]
- From J. T. Moggridge [before 22] June 1871
- From E. F. Lubbock [18 November 1870]
- From G. H. Darwin [1–4 April 1871]
- From G. H. Darwin [after 13 June 1871]
- To Edward Suess 1 June [1871]
- To Thomas Bradfield 2 June [1871]
- To Alexander Agassiz 1 June [1871]
- To C. V. Riley 1 June [1871]
- From Thomas Bradfield 1 June 1871
- To V. O. Kovalevsky 2 June [1871]
- From A. G. Butler 2 June 1871
- To John Murray 3 June [1871]
- To John Higgins 3 June 1871
- From Henry Reeks 3 June 1871
- From Michael Foster 4 June [1871]
- From J. B. Innes 5 June 1871
- From W. E. Darwin 5 June 1871
- To Michael Foster 6 June [1871]
- To F. E. Abbot 6 June [1871]
- From Gerhard Rohlfs 6 June 1871
- To Francis Darwin 6 June [1871]
- From Raphael Meldola 7 June 1871
- To L. H. Morgan 7 June 1871
- To T. C. Eyton 8 June [1871]
- To Gerhard Rohlfs 8 June 1871
- From Henry Reeks 8 June 1871
- From L. H. Morgan 8 June 1871
- To Raphael Meldola 9 June [1871]
- From Paolo Mantegazza 10 June 1871
- From W. D. Fox 11 June [1858]
- From Henry Reeks 12 June 1871
- From László Dapsy 12 June 1871
- From G. H. Darwin [13 June 1871]
- To L. H. Morgan 14 June [1871]
- From Fritz Müller 14 June 1871
- From F. C. Donders 16 June 1871
- From W. B. Tegetmeier 17 [July] 1871
- From Ignatius Jackowski 18 June 1871
- To F. C. Donders 19 June 1871
- From Ernst Pfitzer 19 June 1871
- From T. H. Farrer 19 June 1871
- DCP-LETT-7827
- To T. H. Farrer 21 June [1871]
- From Chauncey Wright 21 June 1871
- From Ferdinand Stoliczka 21 June 1871
- To J. T. Moggridge 22 June [1871]
- From Michael Foster 25 June 1871
- To Michael Foster 26 June [1871]
- From Briton Riviere to E. M. Bonham-Carter 26 June 1871
- From Michael Foster [26 June 1871]
- To Briton Riviere 27 June [1871]
- To J. J. Moulinié 28 June [1871]
- To ? 28 June [1871]
- To Michael Foster 29 [June 1871]
- To J. D. Hooker 29 [June 1871]
- From A. G. Butler 29 June 1871
- DCP-LETT-7839A
- DCP-LETT-7840
- From G. H. Darwin [17 July 1871]
- From H. S. Sanguinetti July 1878
- To Edward Bartlett 1 July [1871]
- To ? 1 July 1871
- To A. G. Butler 1 July [1871]
- To Nature 1 July [1871]
- To C. V. Riley 1 July [1871]
- From W. R. Grove to Charles Lyell 2 July 1871
- From J. D. Hooker 3 July 1871
- To W. R. Grove 4 July [1871]
- To J. D. Hooker 5 July [1871]
- From J. D. Hooker 6 July 1871
- To C. F. Bergstedt? 6 July [1871]
- From J. J. Moulinié 7 July 1871
- From W. R. Grove [5–8 July 1871]
- To C. V. Riley 8 July [1871]
- To A. R. Wallace 9 July [1871]
- To W. R. Grove 9 July [1871]
- From R. H. Blair 11 July 1871
- To A. R. Wallace 12 July [1871]
- To J. J. Moulinié 12 July [1871]
- To Violetta Galton 12 July [1871]
- From A. R. Wallace 12 July 1871
- From Otto Kratz 12 July 1871
- To John Murray 13 July [1871]
- From John Coghlan 13 July 1871
- To Chauncey Wright 13 and 14 July [1871]
- From George Grove 15 July 1871
- To Asa Gray 16 July [1871]
- From A. R. Wallace 16 July 1871
- From Kaiserliche Akademie der Wissenschaften 16 July 1871
- To Chauncey Wright 17 July [1871]
- To George Grove 17 July [1871]
- To W. B. Tegetmeier 18 July [1871]
- From Andrew Smith 18 July 1871
- From A. G. Butler 18 July 1871
- To James Croll 19 July [1871]
- To J. D. Caton 20 July 1871
- From G. C. Oxenden 21 July 1871
- From J. D. Hooker 22 July 1871
- To J. D. Hooker 23 July [1871]
- From J. D. Hooker 23 July 1871
- To Roland Trimen 24 May [1871]
- To Vernon Lushington 24 July [1871]
- To J. D. Hooker 26 July [1871]
- From H. G. Cavendish Browne 26 July 1871
- From Roland Trimen 26 July 1871
- To Roland Trimen 27 July 1871
- From Theodor Piderit 28 July 1871
- From W. E. Darwin 29 July [1871?]
- To E. A. Darwin [after 29 July 1871?]
- From T. H. Huxley 30 July 1871
- To A. R. Wallace 1 August [1871]
- From Chauncey Wright 1 August 1871
- From L. H. Morgan 1 August 1871
- From L. H. Morgan [1 August 1871]
- To Fritz Müller 2 August [1871]
- To Theodor Piderit 2 August [1871]
- To Elliott & Fry [2 August 1871]
- From Asa Gray 3 August 1871
- To A. R. Wallace 4 August [1871]
- From J. D. Hooker 5 August 1871
- From C. A. Canfield 5 August 1871
- To J. D. Hooker 6 August [1871]
- From A. R. Wallace 7 August 1871
- To W. W. Baxter 8 August [1871]
- From Michele Lessona 5 August 1871
- To Friedrich Hildebrand 10 August [1871]
- From T. H. Farrer 11 August 1871
- To John Lubbock 12 August [1871]
- From W. E. Darwin 15 August 1871
- From J. D. Hooker 15 August 1871
- From Emile Alglave 17 August 1871
- To John Murray 17 August [1871]
- From James Croll 17 August 1871
- From R. F. Cooke 18 August 1871
- From James Crichton-Browne 18 August 1871
- From V. O. Kovalevsky 19 August [1871]
- From F. E. Abbot 20 August 1871
- From J. F. McLennan 21 August 1871
- From S. R. S. Norton and C. E. Norton to H. E. Darwin 21 August [1871]
- From Roland Trimen [21] August [1871]
- From Emma Darwin to Roland Trimen [22 August 1871]
- From James Lamont 23 August 1871
- From W. B. Dawkins 27 August 1871
- To W. M. Hacon? 29 August 1871
- To Alexander Agassiz 28 August [1871]
- From J. W. Clark 31 August 1871
- To M. T. Masters 31 August [1871]
- DCP-LETT-7920
- To George Busk 2 September [1871]
- To H. E. Litchfield 4 September [1871]
- From F. A. Hanbury 4 September 1871
- To F. E. Abbot 6 September [1871]
- From Anton Dohrn 7 September 1871
- To Anton Dohrn 8 September 1871
- To Otto Kratz 8 September [1871]
- To Gardeners’ Chronicle [31 August 1871]
- From Wallis Nash 9 September 1871
- From H. Ramu 9 September 1871
- From H. E. Litchfield 9 September [1871]
- From George Busk 10 September 1871
- From E. A. Darwin 10 September [1871]
- To Alexander Agassiz 10 September [1871 or 1873]
- To Osbert Salvin 10 September [1871]
- To Chauncey Wright 12 September 1871
- To Wallis Nash 12 September [1871]
- From E. A. Darwin 12 [September 1871]
- From W. W. Reade 12 September 1871
- To George Busk 13 September [1871]
- From Francis Galton 13 September 1871
- From E. A. Darwin 13 September [1871]
- To John Murray 13 September 1871
- To H. Ramu 13 September 1871
- From Giuseppe Carboni 13 September 1871
- To J. R. Martin 15 September 1871
- To A. D. Bartlett 15 September 1871
- From J. D. Hooker to Emma Darwin 15 September 1871
- From E. A. Darwin [after 13 September 1871]
- From W. W. Reade 15 September 1871
- From H. Marval 15 September 1871
- To J. D. Hooker 16 September [1871]
- From W. W. Reade 18 September 1871
- From A. D. Bartlett 19 September 1871
- To A. D. Bartlett 20 September [1871]
- From T. H. Huxley and H. A. Huxley 20 September 1871
- From Edward Bartlett 20 September 1871
- From W. W. Reade 20 September 1871
- From Roland Trimen 20 September 1871
- From Michael Foster 20 September 1871
- To T. H. Huxley 21 September [1871]
- From Edward Bartlett 21 September 1871
- From Osbert Salvin 21 September 1871
- From Louis Bouton 22 September 1871
- From John Murray 22 September [1871]
- To W. H. Flower 22 September [1871]
- To Paolo Mantegazza 22 September 1871
- To John Murray 23 September [1871]
- To Chauncey Wright 23 September [1871]
- To Edward Bartlett [24] September [1871]
- To E. B. Tylor 24 September [1871]
- From H. Ramu 24 September 1871
- From W. W. Reade 25 September 1871
- From Guiseppe Carboni 25 September 1871
- To H. Ramu 26 September 1871
- From St G. J. Mivart 26 September 1871
- To St. G. J. Mivart 27 September [1871]
- From T. H. Huxley 28 September 1871
- To Albert Günther 28 September [1871]
- From E. B. Tylor 29 September 1871
- To T. H. Huxley 30 September [1871]
- To J. D. Hooker 30 September [1871]
- From Thomas Druitt 30 September 1871
- DCP-LETT-7979
- From Albert Günther 1 October 1871
- From J. D. Hooker [2 October 1871]
- To E. B. Tylor 2 October [1871]
- To Albert Günther 3 October [1871]
- To J. D. Hooker 4 October [1871]
- From J. L. A. Hope 4 October 1871
- From St G. J. Mivart 4 October 1871
- To T. H. Huxley 5 October [1871]
- To John Murray 6 October [1871]
- From H. B. Dobell 6 October 1871
- From T. N. Gill 6 October 1871
- From J. V. Carus 7 October 1871
- To H. B. Dobell 7 October [1871]
- To Lawson Tait 8 October 1871
- To J. V. Carus 8 October [1871]
- To T. H. Huxley 9 October [1871]
- From R. F. Cooke 9 October 1871
- From Hermann Müller 9 October 1871
- From J. K. Fowler 9 October 1871
- To T. R. R. Stebbing 10 October [1871]
- From T. H. Huxley 10 October 1871
- From Osbert Salvin 10 October 1871
- From Chauncey Wright 11 October 1871
- To an editor 12 October [1871]
- From Asa Gray 12 October 1871
- From W. H. Flower 12 October 1871
- To Osbert Salvin 12 October [1871]
- From R. F. Albrecht 13 October 1871
- To R. F. Cooke 13 October [1871]
- To W. H. Flower 13 October [1871]
- From Osbert Salvin 14 October 1871
- To Edward Bartlett 15 October [1871]
- From Edward Bartlett 16 October 1871
- To Edward Bartlett 17 October [1871]
- From George Busk 16 October 1871
- To J. J. Weir 16 October 1871
- To R. F. Albrecht 16 October [1871]
- From H. B. Brady 18 October 1871
- From Osbert Salvin 18 October 1871
- From A. C. Ramsay 18 October 1871
- To J. J. Weir 19 October 1871
- To A. C. Ramsay 19 October 1871
- To Osbert Salvin 19 October [1871]
- To Hermann Settegast 20 October 1871
- From J. D. Hooker 20 October 1871
- To J. D. Hooker [20 October 1871]
- To J. D. Hooker 20 [October 1871]
- From J. D. Hooker 20 October 1871
- To Henry Holland [20 October 1871]
- From A. C. Ramsay 20 October 1871
- From C. S. Bate 22 October 1871
- From H. B. Brady 22 October 1871
- From Osbert Salvin 22 October 1871
- From John Fiske 23 October 1871
- From W. D. Crotch 24 October 1871
- To Osbert Salvin 25 October [1871]
- To Louis Bouton 26 October 1871
- From W. Baranoff and Heinrich Koch 27 October 1871
- From W. Baranoff and Heinrich Koch [after 31 October? 1871]
- To Chauncey Wright 28 October 1871
- To R. F. Cooke 30 October 1871
- From W. E. Darwin to John Higgins 30 October [1871]
- From Osbert Salvin 30 October 1871
- From J. D. Hooker 31 October 1871
- From Heinrich Koch 31 October 1871
- From Henry Gillman 31 October 1871
- To W. E. Darwin 31 [October 1871]
- To W. E. Darwin [after 11 November 1871]
- To H. E. Litchfield [after 5] November 1871
- From W. E. Darwin 6 November 1871
- To W. E. Darwin [after 5 November 1871]
- From W. E. Darwin [19 November 1871]
- To W. E. Darwin [November 1871]
- From F. E. Abbot 1 November 1871
- From R. F. Cooke 1 November 1871
- To John Scott 1 November 1871
- To Osbert Salvin 1 November [1871]
- From J. D. Hooker 2 November 1871
- To James Crichton-Browne 2 November [1871]
- To W. E. Darwin 3 [November 1871]
- From W. E. Darwin [3 November 1871]
- From Hermanus Hartogh Heijs van Zouteveen 3 November 1871
- To J. D. Hooker 3 [December 1872]
- From G. J. Allman 4 November 1871
- To W. E. Darwin [4 November 1871]
- To R. F. Cooke 4 November 1871
- From W. E. Darwin 4 November 1871
- From J. W. Spengel 4 November 1871
- From H. E. Litchfield to Charles and Emma Darwin [5 November 1871]
- To Francis Darwin [6 November 1871]
- From H. E. Litchfield [13 November 1871]
- From S. S. Hennell 7 November 1871
- To H. M. Westropp 7 November [1871]
- To Hermanus Hartogh Heijs van Zouteveen 8 November 1871
- From A. A. Regnard 8 November 1871
- To John Fiske 9 November 1871
- DCP-LETT-8059
- To Hubert Airy 10 [December] 1871
- From W. E. Darwin 11 November 1871
- From O. G. Rejlander 11 November 1871
- From J. M. Rodwell 11 November 1871
- To Roland Trimen 13 November [1871]
- From W. W. Baxter 13 November 1871
- To W. W. Baxter 14 November [1871]
- From J. V. Carus 14 November 1871
- To Daniel Oliver 15 November 1871
- From Federico Delpino 15 November 1871
- To F. E. Abbot 16 November [1871]
- From R. F. Cooke 16 November 1871
- To John Lubbock 17 November 1871
- To J. V. Carus 17 November 1871
- From W. E. Darwin [17 November 1871]
- To R. F. Cooke 17 November 1871
- To Daniel Oliver 17 November 1871
- To David Forbes 18 November [1871]
- To ? 20 November [1871]
- From J. V. Carus 20 November 1871
- From R. O. Jones 20 November 1871
- From S. R. S. Norton 20 November [1871]
- From Francis Galton 21 November 1871
- From W. E. Darwin 22 November 1871
- From David Forbes 22 November [1871]
- To Federico Delpino 22 November 1871
- To S. R. S. Norton 23 November [1871]
- From George Busk 24 November 1871
- From Francis Galton 24 November 1871
- From E. S. Foster 25 November 1871
- To Henry Lee 26 November 1871
- To J. D. Hooker 28 November [1871]
- From K. T. E. von Siebold 29 November 1871
- From H. E. Litchfield [before 2 December 1871]
- To H. E. Litchfield 2 December [1871]
- From Francis Galton 2 December 1871
- From Nevil Maskelyne to John Lubbock 3 December [1871]
- To E. S. Morse 3 December 1871
- To G. A. Eisen 3 December 1871
- From Ulrich Kirchenpauer 4 December 1871
- To K. T. E. von Siebold 4 December 1871
- To J. J. Moulinié 5 December 1871
- To J. V. Carus 5 December 1871
- From George Henslow 5 December 1871
- From Federico Delpino 5 December 1871
- To Nevil Story-Maskelyne 6 December 1871
- To George Henslow 7 December [1871]
- From Nevil Maskelyne 8 December 1871
- From Hubert Airy 9 December 1871
- From Paul Broca 9 December 1871
- To Paul Broca [after 9 December 1871]
- From F. W. C. Simmons 10 December 1871
- From Hubert Airy 12 December 1871
- To J. D. Hooker 15 [December 1871]
- To Horace Darwin [15 December 1871]
- From Louis Bouton 15 December 1871
- From J. D. Hooker [17 December 1871]
- To Henry Lee 17 December [1871]
- To J. D. Hooker [18 December 1871]
- To F. E. E. Wedgwood 19 December [1871]
- To A. D. Bartlett 19 December [1871]
- To Archibald Geikie 20 December [1871]
- From Mary Treat 20 December 1871
- From Ernst Haeckel 21 December 1871
- To William Ogle 21 December [1871]
- To A. C. Ramsay 21 December [1871]
- From J. D. Hooker 22 December 1871
- From Francis Galton 22 December 1871
- To Henry Johnson 23 December 1871
- To Henry Lee 23 December [1871]
- From Archibald Geikie 24 December 1871
- To William Ogle 25 December 1871
- To L. A. Thiers [before 26 December 1871]
- To Ernst Haeckel 27 December 1871
- From A. C. Ramsay 27 December 1871
- To Archibald Geikie 27 December [1871]
- From W. E. Darwin 28 December [1871]
- From Archibald Geikie 29 December 1871
- From G. H. Darwin 30 December 1871
- From Erasmus Galton 30 December 1871
- To Archibald Geikie 30 December 1871
- From Francis Galton [after 22 December 1871]
- From Charles and Emma Darwin to F. J. Wedgwood [after 11 March 1871]
- To John Lubbock [after 21 March 1872]
- From R. B. Litchfield [before 2 December 1871]
- From James Paget [1872]
- From C. V. Smith [1879]
- To [William Baxter or W. W. Baxter?] 2 [October 1842 – April 1882]
- From D. F. Nevill 26 [December 1875?]
- To H. E. Litchfield [before 2 December 1871]
- From D. F. Nevill 17 [April 1875]
- To ? [1872 or later?]
- From J. D. Hooker 1 January 1872
- From W. E. Darwin [1 January 1872]
- From J. J. Moulinié 1 January 1872
- To J. D. Hooker 2 January 1872
- To ? 2 January [1873 or 1874]
- To W. E. Darwin 3 January [1872]
- From A. C. Ramsay 3 January 1872
- From W. E. Darwin [4 January 1872]
- To J. J. Moulinié 4 January 1872
- From St G. J. Mivart 4 January 1872
- To L. C. Wedgwood 5 January [1872]
- To St G. J. Mivart 5 January 1872
- To Mary Treat 5 January 1872
- To Francis Darwin 6 January 1872
- From St G. J. Mivart 6 January 1872
- To St G. J. Mivart 8 January [1872]
- To ? 8 January [1872]
- To F. E. Abbot 8 January 1872
- To John Murray 8 January [1872]
- To W. E. Darwin 9 January [1872]
- From St G. J. Mivart 10 January 1872
- From Eduard von Eichwald 10 January 1872
- From Henri Apatowsky 11 January 1872
- To St G. J. Mivart 11 January [1872]
- From Armand de Quatrefages 12 January 1872
- To J. E. Taylor 13 January [1872]
- To Asa Gray 15 January 1872
- To Armand de Quatrefages 15 January [1872]
- To John Scott 15 January 1872
- From J. J. Aubertin 16 January 1872
- From Fritz Müller 16 January 1872
- To C. H. Morris 16 January [1872]
- From Henry Huxley 17 and 20 January 1872
- From P. C. Sutherland 17 January 1872
- From A. E. Dobbs 17 January 1872
- To W. W. Baxter? 17 January [1872–4]
- To J. W. Dawson 19 January 1872
- To L. H. Morgan 20 January 1872
- From Amy Ruck to Horace Darwin [20 January 1872]
- From L. C. Wedgwood 20 January [1872]
- From Raphael Meldola 21 January [1872]
- To L. C. Wedgwood 21 January [1872]
- To Raphael Meldola 23 January [1872]
- To Francis Galton 23 January [1872]
- To W. E. Darwin 23 January [1872]
- From B. J. Sulivan 23 January 1872
- From J. D. Hooker 24 January 1872
- From Thomas Stanley 24 January 1872
- To B. J. Sulivan 24 January 1872
- To William Bowman 25 January 1872
- From Raphael Meldola 25 January 1872
- To J. D. Hooker 25 January [1872]
- From Arthur Mellersh 25 January 1872
- To W. E. Darwin 26 January [1872]
- To Raphael Meldola 27 January [1872]
- To J. D. Hooker 27 January [1873]
- To J. V. Carus 27 January [1872]
- To John Murray 27 January [1872]
- To John Murray 30 January 1872
- From William Green 30 January 1872
- From John Ball 31 January [1872]
- DCP-LETT-8190A
- To J. J. Moulinié 1 February 1872
- From Francis Galton 1 February 1872
- From Amy Ruck to Horace Darwin [1 February 1872]
- From Asa Gray 2 February 1872
- From John Murray 2 February [1872]
- From Arthur Mellersh 2 February 1872
- From C. F. Martins 3 February 1872
- From Robert Wedgwood to Emma Darwin 3 February [1871]
- To Anton Dohrn 3 February 1872
- From J. D. Hooker [5 February 1872?]
- From Friedrich Hildebrand 5 February 1872
- To E. H. Giglioli 6 February [1873]
- From J. F. Mackenzie 8 February 1872
- From L. C. Wedgwood [8 February 1872]
- From George Henslow [c. 7 December 1876]
- From Robert Wedgwood to Emma Darwin 9 February [1871]
- To Friedrich Hildebrand 9 February 1872
- To H. E. Litchfield 10 February 1872
- To W. E. Darwin 11 February [1871]
- From R. F. Cooke 12 February 1872
- To [M. R. Pryor?] [after 21 January 1871?]
- From W. W. Reade 13 February 1872
- To A. R. Wallace [19 February 1872]
- To ? [16 February – 21 March 1872]
- To J. D. Hague 20 February 1872
- To John Murray 14 February [1872]
- To J. D. Hooker [16 or 23 February or 1 or 8 or 15 March 1872]
- From George Sparkes 14 February 1872
- From A. G. Nathorst [after August 1872]
- From Anton Dohrn 15 February 1872
- From W. W. Reade 16 February 1872
- To W. E. Darwin [1 March 1872]
- To C. S. Tomes 16 February [1874]
- From D. Appleton & Co. 17 February 1872
- From W. W. Reade 18 February 1872
- From W. H. Flower 18 February 1872
- From W. E. Darwin [3 March 1872]
- From W. W. Reade 20 February 1872
- From D. Appleton & Co. 23 February 1872
- To G. C. Wallich 24 February [1872]
- To Amy Ruck 24 February [1872]
- From Charles Nordhoff 27 February 1872
- To Anatole Roujou? 28 February [1872]
- To A. W. Bennett 29 February [1872]
- From Charles Lyell 29 February 1872
- To August Weismann 29 February 1872
- From T. C. Eyton 29 February [1872]
- To John Murray [9 March 1872 or later]
- From Alfred Espinas March 1872
- From Ernst Haeckel 1 March 1872
- From David Forbes 1 March 1872
- From A. R. Wallace 3 March 1872
- To T. C. Eyton 4 March [1872]
- From Alexander Agassiz 4 March 1872
- From Asa Gray 7 March 1872
- From J. B. Innes to Emma Darwin 8 March 1872
- From John Murray 9 March 1872
- From Raphael Meldola 12 March 1872
- From W. W. Reade 12 March 1872
- To Bartholomäus von Carneri 12 March 1872
- From W. W. Reade 14 March 1872
- From Amy Ruck 15 March [1872]
- To D. Appleton & Co. 16 March 1872
- From A. F. Boardman 18 March 1872
- From Gaston de Saporta 18 March 1872
- From W. W. Reade 18 March [1872]
- To G. C. Wallich [20 March 1872]
- From John Scott 22 March 1872
- To ? 23 March [1872–4]
- From W. E. Darwin [19 February 1872]
- To Henry Willett 26 March [1873]
- From Raphael Meldola 26 March 1872
- To James Crichton-Browne 26 March [1871]
- From J. R. Martin 27 March 1872
- To Raphael Meldola 28 March 1872
- From Francis Galton 28 March 1872
- To F. C. Donders 29 March 1872
- To Francis Galton 29 March [1872]
- From Thomas Rivers 29 March 1872
- From Leonard Darwin [29 March 1872]
- From J. D. Hooker to Charles Lyell 30 March 1872
- From V. O. Kovalevsky 30 March 1872
- From Francis Galton 31 March 1872
- From James Murie 31 March 1872
- To Briton Riviere 1 April 1872
- From F. C. Donders 1 April 1872
- To Georg von Seidlitz 1 April 1872
- To James Murie 2 April 1872
- To Thomas Rivers 3 April 1872
- From G. J. Allman 13 April 1872
- From E. A. Darwin 3 April [1872]
- From Briton Riviere 3 April 1872
- From W. W. Reade 3 April 1872
- From Chauncey Wright 3 April 1872
- To Briton Riviere 4 April 1872
- To August Weismann 5 April 1872
- From Adam Elliot 5 April 1872
- To Chauncey Wright 6 April 1872
- To Joseph Kaines? 8 April 1872
- To F. C. Donders 8 April 1872
- To William Bowman 8 April [1872]
- From G. C. Oxenden 8 April 1872
- To Gaston de Saporta 8 April 1872
- To John Lubbock 8 April [1874]
- To Georg von Seidlitz 10 April 1872
- From the Anthropological Society, Vienna 9 April 1872
- To Williams & Norgate 12 April [1872]
- From Roland Trimen 13 April 1872
- From Arthur Russell 15 April 1872
- To E. R. Lankester 15 April [1873]
- To John Scott 15 April [1872]
- To A. G. Carlier 16 April [1872]
- To Friend Lewin 16 April [1872]
- From F. C. Donders 17 April 1872
- From Charles Crawley [18 April 1872]
- To William Bowman 19 April [1872]
- From Francis Galton 19 April 1872
- To Charles Crawley 19 April [1872]
- To G. G. Leveson-Gower, Earl Granville [before 19 April 1872]
- To F. C. Donders 20 April 1872
- To Francis Galton 21 April [1872]
- To ? 21 April 1872
- To Chauncey Wright [11 or 21] April [1872]
- From Georg von Seidlitz 22 April 1872
- To W. H. Edwards 23 April [1872]
- To Rifle Volunteer Corps 23 April 1872
- From A. B. Meyer 25 April 1872
- From F. C. Donders 26 April 1872
- To F. C. Donders 29 April [1872]
- To J. J. Weir 30 April [1872]
- To A. W. Bennett [before 16 November 1871]
- To H. C. F. Jenkin 30 April [1873]
- From Samuel Butler to Francis Darwin [before 30 May 1872]
- To Henry Johnson 2 May [1872]
- From G. H. Darwin 2 May 1872
- To G. H. Darwin 3 May [1872]
- From J. H. Schmick 3 May 1872
- From W. W. Reade 3 May 1872
- From Paolo Mantegazza 4 May 1872
- To Hermann Müller [before 5 May 1872]
- From Hermann Müller 5 May 1872
- To Williams & Norgate 6 May [1872]
- To Charles Lyell 10 May [1872]
- From Albert Günther 10 May 1872
- To Albert Günther 11 May [1872]
- From J. D. Hooker 11 May 1872
- From Samuel Butler 11 May 1872
- To [W. W. Baxter?] 11 May [1873]
- From J. D. Hooker to Emma Darwin [13 May 1872]
- To H. E. Litchfield 13 May 1872
- From W. B. Tegetmeier 13 May 1872
- From Albert Günther 13 May 1872
- To Albert Günther 13 May [1872]
- To Francis Darwin 13 May [1872]
- To W. B. Tegetmeier 14 May [1872]
- From J. D. Hooker 14 May 1872
- To James Hector 14 May 1872
- From Albert Günther 14 May 1872
- To J. D. Hooker 14 May [1872]
- From Gerard Krefft 15 May 1872
- From A. D. Bartlett 16 May 1872
- From Briton Riviere 16 May 1872
- From E. D. Smith 16 May 1872
- From W. W. Reade 16 May 1872
- From Hugh Browne 17 May 1872
- From Albert Günther 17 May 1872
- From William Green 18 May 1872
- To Briton Riviere 19 May [1872]
- From Briton Riviere 20 May 1872
- From W. W. Reade 20 May 1872
- To G. S. Ffinden 21 May [1872]
- To J. D. Cooper 21 May 1872
- From Fulvio Martinelli 21 May 1872
- From Albert Günther 21 May 1872
- To Charles Lyell 22 May [1872]
- From Briton Riviere 22 May 1872
- To ? 22 May 1872
- To Athénaïs Michelet 23 May 1872
- From J. D. Dana 23 May 1872
- From Henry Montague 24 May 1872
- From Chauncey Wright 24 May 1872
- From Francis Galton 26 May 1872
- From Briton Riviere 26 May 1872
- To Francis Galton 27 May [1872]
- To ? 27 May 1872
- From Athénaïs Michelet 17 May 1872
- From Francis Galton 28 May 1872
- From Briton Riviere 28 May 1872
- From Francis Galton 29 May 1872
- To Briton Riviere 29 May 1872
- From Samuel Butler 30 May 1872
- To Nicholas Trübner 30 May [1872?]
- From Hubert Airy 31 May 1872
- From Asa Gray 31 May 1872
- From Francis Darwin [before 30 June 1872]
- From Francis Darwin [before 30 June 1872]
- To Charles Lyell 1 June 1872
- To Chauncey Wright 3 June [1872]
- From Francis Galton 4 June 1872
- From M. C. Stanley 4 June 1872
- To M. C. Lloyd 5 June [1872]
- From Briton Riviere 6 June 1872
- To William Marshall 6 June [1872]
- From Hubert Airy 7 June 1872
- From Francis Galton 7 June 1872
- From John Murray 7 June [1872]
- From John Tyndall 8 June [1872]
- From Alfred Tylor 8 June 1872
- To Hubert Airy? 9 June [1872?]
- From C. L. Sutherland [9–19 June 1872]
- From J. D. Hooker to W. E. Darwin [13 June 1872]
- To ? 13 June [1872–4]
- To Herbert Spencer 10 June [1872]
- From Asa Gray 11 June 1872
- From Menyhért Lónyay 11 June 1872
- To Menyhért Lónyay [after 11 June 1872]
- To John Tyndall 11 June 1872
- From Herbert Spencer 12 June 1872
- To J. D. Hooker 14 June [1872]
- From J. D. Hooker 15 June 1872
- From B. A. Renshaw 15 June 1872
- From V. O. Kovalevsky [after 8 June 1872]
- From Friedrich Tiemann 16 June 1872
- From T. H. Farrer 16 June 1872
- To F. C. Donders 17 June 1872
- From Albert Günther 19 June 1872
- From B. J. Sulivan 20 June 1872
- From Rudolf Sundström 20 June 1872
- To Albert Günther 21 June [1872]
- To W. E. Darwin 22 [March 1868]
- From Athénaïs Michelet 26 June 1872
- To Eduard Strasburger 29 July 1872
- From A. H. Garrod to Francis Darwin 30 June [1872]
- From Dr von Gloeden 1 July 1872
- To F. E. Abbot 2 July 1872
- To Asa Gray 8 July [1872]
- To John Denny 9 July 1872
- From John Lubbock to W. E. Gladstone 20 June 1872
- To Leonard Darwin 11 July [1872]
- To ? 10 July [1872–3]
- To Charles Lyell 12 July [1872]
- To J. D. Hooker 12 July [1872]
- To ? 12 July [1872–4]
- From John Denny 12 July 1872
- DCP-LETT-8407F
- From W. D. Fox 13 July [1872]
- From J. V. Carus 14 July 1872
- To John Denny 14 July [1872]
- From F. C. Donders 14 July 1872
- From Hubert Airy [before 15] July 1872
- To W. D. Fox 16 July [1872]
- From Hubert Airy 16 July 1872
- To J. V. Carus 16 July 1872
- To Gerard Krefft 17 July 1872
- From F. E. Abbot 18 July 1872
- From Hubert Airy 20 July 1872
- To C. L. Brace 20 July [1872]
- From Robert Christison to W. E. Gladstone 20 July 1872
- From John Denny 20 July 1872
- From Hubert Airy 21 July 1872
- To John Denny 22 July 1872
- From Armand de Quatrefages 23 July 1872
- From William Bowman 24 July 1872
- From Hubert Airy 24 July 1872
- To H. E. Litchfield 25 July 1872
- To Heinrich Fick 26 July [1872]
- From J. T. Gulick 27 July 1872
- To A. R. Wallace 27 July [1872]
- From R. F. Cooke 27 July 1872
- To J. T. Gulick 28 July [1872]
- From Francis Galton 29 July 1872
- To R. F. Cooke 29 July 1872
- To Robert Cooke? [29 July 1872]
- To Leonard Darwin 26 July [1872]
- To Edwards & Kidd 30 July [1872]
- From H. H. Howorth 30 July 1872
- To ? 30 July [1872–4]
- From William Bowman 31 July 1872
- From J. J. Weir 31 July 1872
- To J. J. Weir 31 July [1872]
- To Francis Galton 1 August [1872]
- From D. Appleton & Co. 1 August 1872
- From R. F. Cooke 1 August 1872
- From A. S. Packard Jr 1 August 1872
- To J. V. Carus 3 August [1872]
- To A. R. Wallace 3 August [1872]
- To Nature 3 August [1872]
- To J. D. Hooker 4 August [1872]
- From A. R. Wallace 4 August 1872
- To R. F. Cooke 4 August 1872
- From R. F. Cooke 6 August 1872
- From J. T. Gulick 6 August 1872
- To Oswald Heer 4 August [1872–4]
- To R. F. Cooke 7 August 1872
- From V. O. Kovalevsky [before 8 August 1872]
- To J. T. Gulick 8 August [1872]
- To R. F. Cooke 8 August [1872]
- From V. O. Kovalevsky 8 August [1872]
- From R. F. Cooke 9 August 1872
- To ? 9 August [1872–4]
- To Francis Galton 9 August [1872]
- To V. O. Kovalevsky 10 August [1872]
- To R. F. Cooke 10 August [1872]
- From V. O. Kovalevsky [12–17 August 1872]
- To Francis Galton 12 August [1872]
- From Francis Galton 11 August 1872
- To John Scott 12 August 1872
- From Charles Layton 13 August 1872
- From R. F. Cooke to G. H. Darwin 13 August 1872
- To R. F. Cooke [14 August 1872]
- From R. F. Cooke 14 August 1872
- From J. J. Weir 14 August 1872
- To R. F. Cooke 15 August 1872
- From D. F. Tyler 15 August 1872
- From R. F. Cooke 16 August 1872
- To R. F. Cooke 17 August 1872
- To V. O. Kovalevsky 17 August 1872
- From V. O. Kovalevsky [after 12 August 1872]
- From Arthur Nicols 20 August 1872
- To Arthur Nicols [after 20 August 1872?]
- From K. M. Giuntsburg 20 August 1872
- From R. F. Cooke 21 August 1872
- From Johan IJkema 21 August 1872
- From Anton Dohrn 21 August 1872
- To R. F. Cooke 23 August 1872
- From R. F. Cooke 23 August 1872
- From Arthur Nicols 23 August 1872
- To Edward Vivian 23 August [1872]
- To Anton Dohrn 24 August [1872]
- To Hubert Airy 24 August 1872
- From R. F. Cooke 26 August 1872
- To A. R. Wallace 28 August [1872]
- From Anton Dohrn 28 August 1872
- From F. W. Harmer 28 August 1872
- To F. W. Harmer 29 August 1872
- To J. D. Hooker 29 August [1872]
- From J. D. Hooker 29 August 1872
- From Chauncey Wright 29 August 1872
- To J. D. Hooker 30 August [1872]
- To John Murray 30 August [1872]
- To Williams & Norgate 30 August [1872]
- From Richard Harte 30 August 1872
- To Chauncey Wright 31 August [1872]
- From A. R. Wallace 31 August 1872
- From F. W. Harmer 31 August 1872
- From G. H. Darwin [13 August 1872]
- To the Linnean Society [after 12] September 1872
- To J. J. Moulinié 23 September 1872
- From ? September 1872
- To A. R. Wallace [2 September 1872]
- From J. D. Hooker 2 September 1872
- To Ernst Haeckel 2 September 1872
- From Chauncey Wright 2 September 1872
- From John Murray 3 September [1872]
- From N. Sobko 3 September 1872
- To W. W. Baxter 4 September [1872?]
- To Ernest Edwards 4 September 1872
- To Chauncey Wright 6 September [1872]
- From V. O. Kovalevsky 6 September [1872]
- From W. W. Reade 7 September 1872
- From Chauncey Wright 9 September 1872
- From V. O. Kovalevsky 10 September 1872
- To the Linnean Society 12 September 1872
- From C. L. Sutherland 12 September 1872
- From W. W. Reade 12 September [1872]
- From C.-F. Reinwald 13 September 1872
- From C.-F. Reinwald 17 September 1872
- From V. O. Kovalevsky [c. 7 August 1872]
- To W. W. Baxter 17 September [1872?]
- To J. J. Weir 18 September [1873]
- To V. O. Kovalevsky 18 September [1872]
- From H. A. Head 18 September 1872
- From Hubert Airy 20 September 1872
- From V. O. Kovalevsky 20 September [1872]
- To W. E. Darwin 20 [January or February 1871?]
- From William Cooper 21 September 1872
- To J. V. Carus 23 September 1872
- From Hubert Airy 24 September 1872
- To V. O. Kovalevsky 24 September [1872]
- From John Scott 25 September 1872
- From C.-F. Reinwald 26 September 1872
- To Henri de Lacaze-Duthiers 28 September 1872
- To R. F. Cooke [after 11 October 1872]
- To R. F. Cooke [25 October 1872]
- From R. F. Cooke 2 October 1872
- To H. B. Wheatley [after 30 September 1872]
- To R. F. Cooke 3 October 1872
- To George Harris 4 October [1872]
- To J. D. Hooker 4 October [1872]
- From Frédéric Baudry 4 December 1872
- From R. F. Cooke 4 October 1872
- From Asa Gray 6 October 1872
- From J. T. Moggridge 6 October 1872
- From J. D. Hooker 7 October 1872
- From J. V. Carus 7 October 1872
- From R. F. Cooke 9 October 1872
- To J. T. Moggridge 9 October [1872]
- To Alpheus Hyatt 10 October [1872]
- To J. D. Hooker 10 October [1872]
- To Charles Lyell [9 April 1873]
- To J. V. Carus 10 October [1872]
- DCP-LETT-8553F
- From J. V. Carus 11 October 1872
- From R. F. Cooke 11 October 1872
- From Ernst Haeckel 12 October 1872
- To T. H. Farrer 13 October [1872]
- From W. W. Reade 14 October [1872]
- To J. V. Carus 15 October [1872]
- From William Marshall 15 October 1872
- To H. A. Huxley 16 October [1872]
- From H. A. Huxley and T. H. Huxley 17 October 1872
- From T. H. Farrer 17 October 1872
- From C. I. F. Major 18 October 1872
- To Emil Lehmann 18 October [1872]
- To C. I. F. Major [c. 1 November 1872]
- From J. D. Hooker to Emma Darwin 19 October 1872
- To A. R. Wallace 20 October [1872]
- To T. H. Huxley 22 October [1872]
- To Asa Gray 22 October 1872
- To J. D. Hooker 22 October [1872]
- From R. F. Cooke 22 October 1872
- From C.-F. Reinwald 22 October 1872
- To R. F. Cooke 23 October [1872]
- To J. D. Hooker 24 October [1872]
- From J. V. Carus 24 October 1872
- From R. F. Cooke 25 October 1872
- From R. F. Cooke 26 October 1872
- From W. D. Fox 25 October [1872]
- From J. D. Hooker 26 October 1872
- To John Scott 26 October 1872
- To J. D. Hooker 27 October [1872]
- To J. V. Carus 27 October [1872]
- To R. F. Cooke 27 October [1872]
- To A. R. Wallace 27 October [1872]
- To George King 28 October 1872
- To G. H. Kinahan and M. H. Close 29 October 1872
- From J. D. Hooker 29 October 1872
- To W. D. Fox 29 October [1872]
- DCP-LETT-8585F
- To J. D. Hooker 31 October [1872]
- From J. V. Carus 31 October 1872
- From John Scott to J. D. Hooker 31 October 1872
- To William Bowman [after 21 December 1872]
- To George King November 1872
- To Amy Ruck [1 November 1872]
- To S. H. Haliburton 1 November [1872]
- To W. W. Baxter 2 [December 1872]
- To Alphonse de Candolle 2 November [1872]
- From W. E. Darwin [3 November 1872]
- From L. H. Jeitteles 3 November 1872
- From S. H. Haliburton 3 November [1872]
- To J. D. Hooker 3 November [1872]
- From J. S. Craig 4 November 1872
- From M. T. Masters 4 November 1872
- DCP-LETT-8598
- From Auguste Houzeau de Lehaie 4 November 1872
- From W. W. Reade 5 November 1872
- To S. H. Haliburton 6 November [1872]
- From John Murray 6 November [1872]
- From Henry Maudsley 6 November 1872
- From Henry Holland 6 November [1872]
- To L. H. Jeitteles 7 November 1872
- To J. S. Craig 7 November 1872
- From Francis Galton 7 November 1872
- To John Murray 7 November [1872]
- To Francis Galton 8 November [1872]
- From J. D. Hooker 8 November 1872
- From J. D. Hooker 8 November 1872
- From A. J. Cupples to Emma Darwin 8 November [1872]
- From S. H. Haliburton 8 November [1872]
- To W. W. Baxter? 8 November [1872–4]
- To J. D. Hooker 9 November [1872]
- From R. H. Blair 9 November 1872
- From John Murray 9 November 1872
- To A. C. Ramsay 9 November [1872]
- From Federico Delpino 10 November 1872
- From W. E. Darwin to Frederic Higgins 10 November [1872]
- To J. V. Carus 11 November [1872]
- From H. M. Butler 11 November 1872
- To John Murray 11 November 1872
- From George Cupples 11 November 1872
- From John Murray 12 November [1872]
- To John Murray 13 November 1872
- From Anton Dohrn 13 November 1872
- From Albert Günther 14 November 1872
- From Francis Galton 15 November 1872
- From A. R. Wallace 15 November 1872
- From William Bowman 16 November 1872
- From Athénaïs Michelet 16 November 1872
- From Henry MacKay 16 November 1872
- From Herbert Spencer 16 November 1872
- From W. D. Crotch 17 November 1872
- From C. I. F. Major 17 November 1872
- To John Higgins 18 November 1872
- From D. T. Smith 19 November 1872
- To D. T. Smith [after 19 November 1872]
- From E. A. Darwin 20 November [1872]
- From R. F. Cooke 20 November 1872
- To R. F. Cooke 20 November [1872]
- To J. M. Herbert 21 November 1872
- From A. W. Bennett 22 November 1872
- From Briton Riviere 22 November 1872
- From Wilkinson? to T. H. Huxley 22 November 1872
- From C.-F. Reinwald 23 November 1872
- From J. M. Herbert 23 November 1872
- To Albert Günther 23 November 1872
- From R. F. Cooke 25 November 1872
- From J. T. Rothrock 25 November 1872
- From William Main 26 November 1872
- From F. P. Cobbe [26 November 1872]
- From Richard Lydekker [after 26 November 1872]
- From Isaac Markens 27 November 1872
- To J. W. Spengel 27 November [1874]
- From J. D. Hooker 28 November 1872
- To F. P. Cobbe 28 November 1872
- From F. P. Cobbe 28 November [1872]
- To William Main 29 November [1872]
- From Alpheus Hyatt [late] November 1872
- From Asa Gray 2 December 1872
- From Hubert Airy 3 December 1872
- To Alpheus Hyatt 4 December [1872]
- From W. W. Baxter 4 December 1872
- To W. W. Baxter [after 4 December 1872]
- From Armand de Watteville 5 December [1871]
- To ? 5 December 1872
- From Mr Topham 5 December 1872
- To ? 5 December 1872
- From R. F. Cooke 6 December 1872
- To F. J. Furnivall 6 December [1872–3]
- To R. F. Cooke 7 December [1872]
- To C. J. Maynard 7 December [1872–3]
- From Alpheus Hyatt 8 December 1872
- To ? 9 December 1872
- From E. A. Darwin to Emma Darwin 9 December [1872]
- From Alexander Agassiz 9 December 1872
- From A. J. Munby 9 December 1872
- To C. L. Dodgson 10 December 1872
- From Ernst Haeckel 10 December 1872
- To John Topham 10 December 1872
- From J. V. Carus 10 December 1872
- From E. A. Darwin 11 December [1872]
- To Alphonse de Candolle 11 December 1872
- To Henri de Lacaze-Duthiers 11 December 1872
- To J. V. Carus 12 December [1872]
- From E. A. Darwin 13 December [1872]
- From Mary Treat 13 December 1872
- To A. R. Wallace 14 December [1872?]
- To Alpheus Hyatt 14 December [1872]
- From F. A. Nussbaumer and Rudolf Hoernes 4 December 1872
- From James Dickson 14 December 1872
- To C. L. Dodgson 14 December [1872]
- From Julius Althaus 16 December 1872
- To T. H. Huxley [17] December [1872]
- From Dora Roberts 17 December [1872 or later]
- From Julius Herschel 17 December 1872
- From Jules Michelet 15 November 1872
- From A. Smither 19 December 1872
- From T. H. Huxley 20 December 1872
- To Ernst Haeckel 20 December 1872
- From S. J. Housley 20 December 1872
- To F. C. Donders 21 December 1872
- To D. H. Tuke 22 December 1872
- From Paolo Mantegazza 23 December 1872
- From H. Henry 23 December 1872
- From M. D. Conway 24 December 1872
- From F. C. Donders 24 December 1872
- From F. P. Cobbe 25 December [1872]
- To Paolo Mantegazza 28 December 1872
- To Francis Galton 30 December [1872]
- From Gerard Krefft 30 December 1872
- From E. F. Lubbock [after 7 April 1873?]
- From E. F. Lubbock to Emma Darwin [c. 29 November 1873]
- To ? [1873?]
- From E. F. Lubbock [1873?]
- From G. H. Darwin [1 October 1873]
- From Henry Reeks 3 March 1873
- To Agnes Haeckel [before 3 March 1873]
- To Bromley Rural Sanitary Authority [1873?]
- From William Ogle [after 5 May 1873]
- From ? [1873?]
- From George Jenyns? to F. H. or J. D. Hooker? [c. 19 April 1873?]
- From Stanley Haynes [1873?]
- From Leonard Darwin [after 14 February 1874]
- From Felix Choice [1873?]
- From J. B. Dunbar-Brander [before 9 July 1873]
- From Hermanus Hartogh Heijs van Zouteveen [before 18 January 1873]
- From James Paget [1873]
- From Francis Darwin [1873]
- From ? [1873–4?]
- From Francis Darwin [1–15 March 1873]
- To Charles Lyell [9 November 1873 or 26 April or 6 December 1874]
- From Francis Darwin [after 1871?]
- From J. P. M. Weale to Norman Lockyer [January 1873]
- From C. L. Brace [August? 1873]
- From Alois Humbert [before 18] January 1873
- To Mary Treat 1 January 1873
- From Hubert Airy 3 January 1873
- From F. W. Smartt to Willie[?] 3 January 1873
- From H. H. Howorth 3 January [1874]
- From Lajos Felméri 3 January 1873
- To Francis Galton 4 January [1873]
- From J. D. Baldwin 4 January 1873
- To J. D. Hooker 5 January [1873]
- From J. D. Hooker 7 January 1873
- To Asa Gray 8 January 1873
- To ? 9 January 1873
- To J. D. Hooker 9 January 1873
- To M. D. Conway 11 January [1873]
- To the Spectator 11 January 1873
- From J. D. Hooker 12 January 1873
- To J. D. Hooker 12 January [1873]
- From J. D. Hooker [13 or 20 January 1873]
- To A. R. Wallace 13 January [1873]
- From A. R. Wallace 14 January 1873
- From Alphonse de Candolle 14 January 1873
- From Ernst Meitzen 17 January 1873
- From James Paget 17 January 1873
- From H. P. Lee 17 January 1873
- To James Paget 18 January [1873]
- To Alphonse de Candolle 18 January [1873]
- From J. D. Hooker 20 January 1873
- To Ernst Haeckel 20 January 1873
- To Hubert Airy [before 21 January 1873]
- From Hubert Airy 21 January 1873
- From J. V. Carus 21 January 1873
- To J. D. Baldwin 21 January [1873]
- To G. H. Darwin 22 January 1873
- To J. V. Carus 23 January 1873
- From R. F. Cooke 24 January 1873
- From Anton Dohrn 27 January 1873
- From J. V. Carus 29 January 1873
- To John Chapman 1 February 1873
- To James Paget 29 January [1873?]
- From F. S. B. F. de Chaumont 31 January 1873
- To ?[a New Orleans newspaper] [c. February 1873]
- To J. V. Carus 1 February 1873
- From W. M. Canby 1 February 1873
- From J. T. Moggridge 1 February 1873
- To F. S. B. François de Chaumont 3 February [1873]
- To W. B. Dawkins 3 February 1873
- To J. E. Gray 4 February [1873]
- From C. I. F. Major 6 February 1873
- From F. B. Goodacre 7 February 1873
- From T. H. Huxley [8 February 1873]
- To Matthew Arnold 9 February [1873]
- From John Murray 10 February [1873]
- To F. B. Goodacre 11 February [1873]
- To C. I. F. Major 11 February 1873
- DCP-LETT-8764
- To Nature [before 13 February 1873]
- From Francis Galton to William Huggins 15 February 1873
- From Mariabella Fry 15 February 1873
- To Gerard Krefft 17 February 1873
- To J. D. Hooker 17 February 1873
- From Daniel Oliver 17 February 1863
- From C. H. Schaible 17 February 1873
- To George King 18 February 1873
- To W. M. Canby 19 February 1873
- From F. X. Neumann von Spallart 19 February 1873
- From T. R. Clephan 19 February 1873
- To Albert Gaudry 19 February 1873
- To James Shaw 19 February 1873
- To [Williams & Norgate] 19 February [1873]
- From J. D. Hooker 20 February 1873
- From L. M. Forster to H. E. Litchfield 20 February 1873
- To J. D. Hooker 21 February [1873]
- From Arthur Nicols 21 February 1873
- From J. R. Martin 22 February 1873
- From W. F. Collier 22 February 1873
- From Ernst Haeckel 23 February 1873
- From Robert Smith 24 February 1873
- From J. C. Houzeau 24 February 1873
- From Asa Gray 25 February 1873
- From R. B. Litchfield 26 February 1873
- From J. D. Hague 26 February 1873
- From H. A. Head 27 February 1873
- To T. W. Higginson 27 February [1873]
- To Robert Smith 27 February [1873]
- From Hermann Müller 28 February 1873
- To James Crichton-Browne 28 February [1873]
- From E. M. Swanwick [after 13 February 1873]
- From ? [after 14 January 1874]
- From James Crichton-Browne 2 March 1873
- From Thomas Meehan 3 March 1873
- To Henry Reeks 5 March [1873]
- From C.-F. Reinwald 4 March 1873
- To James Crichton-Browne 4 March [1873]
- To G. H. Darwin 5 March [1873]
- From W. H. Hall 5 March 1873
- From W. F. Collier 7 March 1873
- From Henry Reeks 8 March 1873
- From F. B. Johnston 9 March 1873
- From Athénaïs Michelet 9 March 1873
- To J. T. Moggridge 10 March 1873
- To Asa Gray 11 March [1873]
- To J. C. Costerus and N. D. Doedes [22?] March 1873
- From Otto Caspari 12 March 1873
- To Nature [before 13 March 1873]
- From G. M. Humphry [before 14] March 1873
- To T. M. Hughes 13 March [1873]
- To G. M. Humphry 14 March 1873
- From A. W. Bennett 16 March 1873
- From Hubert Airy 17 March 1873
- From William Pengelly 17 March 1873
- To F. P. Cobbe? 18 March [1873?]
- From J. C. Costerus and N. D. Doedes 18 March 1873
- To Thomas Meehan 19 March [1873]
- To William Pengelly 19 March [1873]
- From Arthur Nicols [before 20 March 1873]
- To Arthur Nicols [20 March 1873]
- To William Turner 21 March [1873]
- From G. H. Eggers 21 March 1873
- From Johannes Huber 22 March 1873
- From Raphael Meldola 24 March 1873
- From W. W. Reade 25 March [1873]
- To Raphael Meldola 26 March [1873]
- From Robert Swinhoe 26 March 1873
- To T. L. Brunton 26 March 1873
- To Nature [before 27 March 1879]
- From G. B. Thornbery 27 March 1873
- From N. D. Doedes 27 March 1873
- From A. G. Butler 27 March 1873
- To J. S. Burdon Sanderson 29 March 1873
- To the Medical Times and Gazette [before 29 March 1873]
- From T. W. Higginson 30 March 1873
- To Marian Evans 30 March [1873]
- From Marian Evans 31 March 1873
- From E. F. Lubbock [before 7 April 1873]
- From Gerard Krefft [c. 1 November 1873?]
- To Samuel Butler 1 April [1873]
- From William Main 2 April 1873
- To N. D. Doedes 2 April 1873
- To Nature [before 3 April 1873]
- To G. H. Darwin [3 April 1873]
- To F. H. Hooker 3 April [1873]
- To J. D. Hague 3 April [1873]
- From N. D. Doedes 4 April 1873
- From W. S. C. to George Busk 5 April 1873
- To J. D. Hooker [6 April 1873]
- From Adolph Reuter 6 April 1873
- To Thomas Davidson 7 April 1873
- From G. H. Darwin to John Tyndall [7 April 1873]
- From J. D. Hooker [7 April 1873]
- From Charles Voysey 7 April 1873
- To Francis Darwin [before 15 April 1873]
- From John Tyndall 8 April [1873]
- To John Tyndall 8 April [1873]
- To William Spottiswoode [8 April 1873]
- From John Tyndall 9 April [1873]
- To Nature [before 3 April 1873]
- From T. H. Farrer [before 10 April 1874]
- From John Tyndall 10 April 1873
- To John Tyndall 11 April 1873
- From J. D. Hooker 11 April 1873
- To Albert Günther 12 April [1873]
- To A. W. Merriam 13 April 1873
- From Samuel Butler 15 April 1873
- From John Tyndall 16 April 1873
- From James Crichton-Browne 16 April 1873
- To Francis Darwin 16 April [1873]
- To Leonard Blomefield 17 April [1873]
- To Adolph Reuter 17 April 1873
- To James Crichton-Browne 17 April [1873]
- To Francis Darwin [17 April 1873]
- To John Tyndall 18 April [1873]
- From Federico Delpino 20 April 1873
- To W. B. Carpenter 21 April [1873]
- From John Tyndall 21 April 1873
- From W. M. Canby 22 April 1873
- To T. H. Huxley 23 April 1873
- From T. H. Huxley 24 April 1873
- From E. A. Darwin to Emma Darwin 24 April [1873]
- To T. H. Huxley 25 April 1873
- To subscribers to T. H. Huxley’s gift [25 April 1873]
- To John Tyndall 25 April [1873]
- To John Tyndall 25 April [1873]
- To John Tyndall 25 April 1873
- From J. D. Hooker 25 April 1873
- To J. D. Hague 25 April [1873]
- From T. H. Huxley 26 April 1873
- From Herbert Spencer 26 April 1873
- From Senckenbergische Naturforschende Gesellschaft 26 April 1873
- To Charles Lyell 25 April [1873]
- To T. H. Farrer 28 April 1873
- To George Cupples 28 April [1873]
- To T. H. Huxley 28 April 1873
- From Emil Buck 28 April 1873
- To ? 28 April 1873
- From Francis Galton [before 28 May 1873]
- From J. V. Carus [before 8 May 1873]
- From George Cupples 1 May 1873
- To Federico Delpino 1 May 1873
- To Isidoro Dell’Oro 2 May 1873
- To John Tyndall 2 [May] 1873
- From Gerard Krefft 3 May 1873
- From T. H. Farrer 3 May 1873
- To John Murray 4 May [1873]
- To ? 4 May [1873]
- To A. W. Bennett 5 May [1873]
- To Felix von Luschan 5 May 1873
- From K. E. von Baer 5 May 1873
- To Hermann Müller 5 May 1873
- To William Ogle 5 May [1873]
- From W. F. Barrett 6 May 1873
- To T. B. Leffen 7 May 1873
- To W. M. Canby 7 May 1873
- From A. W. Bennett 8 May 1873
- To J. V. Carus 8 May [1873]
- From Hermann Müller 19 May 1873
- From S. J. Pozzi 11 May 1873
- From Hermann Müller 12 May 1873
- From Ludwik Masłowski 14 May 1873
- From C.-F. Reinwald 14 May 1873
- From W. W. Reade 14 May 1873
- To Friedrich Hildebrand 15 May 1873
- To S. J. Pozzi 15 May 1873
- To Charles Lyell 16 May [1873]
- From V. O. Kovalevsky 17 May 1873
- From Arthur Russell 19 May 1873
- To V. O. Kovalevsky 21 May 1873
- From Arthur Mostyn-Owen 21 May 1873
- From S. M. Shepley to ? 22 May 1873
- To J. J. Weir 22 May 1873
- From Friedrich Hildebrand 23 May 1873
- To Anton Kerner von Marilaun 24 May [1873]
- From A. F. Baker 25 May 1873
- From Arthur Nicols 25 May 1873
- From Hermann Müller 27 May 1873
- To Francis Galton 28 May 1873
- From Rudolf Hennig 28 May 1873
- From Arthur Mostyn-Owen 28 May 1873
- From William Harte 29 May 1873
- From Francis Galton 30 May 1873
- To Hermann Müller 30 May 1873
- DCP-LETT-8930
- From László Dapsy 1 June 1873
- To ? [before 22 May 1877?]
- To Anton Dohrn 2 June [1873]
- To B. T. Lowne 3 June 1873
- From George Cupples 4 June 1873
- To George Cupples 7 June [1873]
- From Anton Dohrn 7 June 1873
- From A. A. L. P. Cochrane 7 June 1873
- To A. A. L. P. Cochrane [after 7 June 1873]
- From W. P. Ayres 8 June 1873
- To László Dapsy 9 June 1873
- From Hermann Müller 10 June 1873
- From Albert Günther 11 June 1873
- From Francis Darwin [30 September 1873]
- To Albert Günther 14 June [1873]
- To C. H. Blackley 14 June [1873]
- From Charles Hinton 15 June 1873
- From Federico Delpino 18 June 1873
- To E. W. Lane 23 June 1873
- From C. F. Martins 23 June 1873
- To J. S. Burdon Sanderson 24 June 1873
- From J. S. Burdon Sanderson 25 June 1873
- From A. C. Smith 25 June 1873
- To Federico Delpino 25 June [1873]
- To J. S. Burdon Sanderson 26 June [1873]
- From W. W. Reade 26 June 1873
- From J. D. Hague 26 June 1873
- From T. F. Cheeseman 27 June 1873
- To J. D. Hooker 28 June 1873
- To Charles Lyell 28 June [1873]
- From Friedrich Max Müller 29 June 1873
- From J. D. Hooker 30 June 1873
- To W. H. Flower 30 June 1873
- From Gerard Krefft [after 12 July 1873]
- To J. D. Hooker 1 July [1873]
- From Hermann Müller 1 July 1873
- To Friedrich Max Müller 3 July 1873
- To W. B. Tegetmeier 4 July [1871]
- From J. E. Boehm 4 July 1873
- To C. H. Blackley 5 July [1873]
- To George King 6 July 1873
- From C. H. Blackley 7 July 1873
- From John Farr 7 July 1873
- From G. H. Darwin 8 July 1873
- To A. R. Wallace 9 July [1873]
- From Bushell Anningson 9 July 1873
- To Armand de Quatrefages 9 July [1873]
- From John Farr 10 July 1873
- From C. H. Blackley 11 July 1873
- To Gerard Krefft 12 July [1873]
- From A. W. Bennett 12 July 1873
- From J. T. Moggridge 12 July 1873
- To Edward Frankland 12 July 1873
- To Henry Edwards 15 July [1873]
- From Edward Frankland 15 July 1873
- To James Dewar and J. G. M‘Kendrick 15 July 1873
- From M. C. Stanley 16 July 1873
- To Edward Frankland 16 July [1873]
- From Edward Frankland 17 July 1873
- To ? 18 July [1873?]
- To Edward Frankland 18 July [1873]
- From John Chapman 19 July 1873
- From J. T. Moggridge 22 July 1873
- To Nature [before 24 July 1873]
- From J. T. Moggridge 24 July 1873
- To Armand Sabatier 24 July 1873
- To J. S. Burdon Sanderson 25 July 1873
- From J. S. Burdon Sanderson 28 July [1873]
- From Mary Treat 28 July 1873
- From J. T. Moggridge 30 July 1873
- To J. D. Hooker 31 July [1873]
- From J. V. Carus 21 July [1873]
- From Frank Chance 31 July – 7 August 1873
- From F. J. Wedgwood [August–September? 1873]
- From Thomas Belt 2 August 1873
- To J. V. Carus 2 August [1873]
- To G. H. Darwin 2 August [1873]
- To Thomas Belt [7 August 1873]
- From J. D. Hooker 3 August 1873
- To J. D. Hooker 4 August [1873]
- From J. O. W. Haweis 8 August [1873]
- From Gerard Krefft 8 August 1873
- To T. H. Farrer 10 August [1873]
- To Frank Chance 10 August [1873]
- From Raphael Meldola 11 August 1873
- From T. H. Farrer 12 August 1873
- From T. H. Farrer 12 August [1873]
- To Mary Treat 12 August 1873
- To Raphael Meldola 13 August [1873]
- To J. D. Hooker 13 August 1873
- From J. S. Burdon Sanderson 13 August [1873]
- From E. T. Gardner 13 August 1873
- From Francis Darwin 14 August [1873]
- To T. H. Farrer 14 August 1873
- From J. D. Hooker 14 August 1873
- From Francis Darwin [16 or 17 August 1873]
- To J. S. Burdon Sanderson 15 August 1873
- To Francis Darwin 15 August [1873]
- To Francis Darwin 18 [August 1873]
- From Francis Darwin [25 August 1873]
- To J. D. Hooker 19 August 1873
- From J. D. Hooker 21 August 1873
- To Herbert Spencer 21 August [1873]
- From W. G. Walker 21 August 1873
- From J. D. Hooker [22 August 1873]
- From W. E. Darwin [22 August 1873]
- From W. D. Fox 22 August [1873]
- From J. T. Moggridge 22 August 1873
- From W. E. Darwin [25 August 1873]
- From Richard Strachey 25 August 1873
- From Theodor Gomperz 25 August 1873
- From Hermann Müller 25 August 1873
- To J. S. Burdon Sanderson 27 August 1873
- To J. T. Moggridge 27 August 1873
- From G. H. Darwin to Richard Strachey [29 August 1873]
- From E. C. Rye 29 August 1873
- From W. W. Reade 29 August 1873
- From J. D. Hooker 30 August 1873
- From W. E. Darwin 30 August – 14 September [1873]
- From V. O. Kovalevsky 30 August 1873
- From W. W. Reade 31 August [1873]
- To Gerard Krefft [September 1873]
- From J. D. Hooker [September 1873]
- To Theodor Gomperz 1 September [1873]
- To W. D. Fox 1 September [1873]
- To Francis Darwin [4 September 1873]
- To ? [June–September 1873?]
- From Andrew Clark 3 September 1873
- To W. W. Baxter 4 September 1873
- To W. W. Baxter 5 September [1873]
- From Gerard Krefft 6 September 1873
- To James Crichton-Browne 7 September [1873]
- To W. W. Baxter 8 September [1873]
- To J. S. Burdon Sanderson 9 September [1873]
- To T. F. Cheeseman 9 September [1873]
- From M. D. Conway 10 September [1873]
- From W. S. Wade 11 September 1873
- To M. D. Conway 12 September [1873]
- To J. D. Hooker 12 September [1873]
- From James Crichton-Browne 12 September 1873
- From J. D. Hooker 17 [November 1873]
- To J. S. Burdon Sanderson 13 September [1873]
- To J. S. Burdon Sanderson 14 September [1873]
- From J. D. Hooker 16 September 1873
- To E. S. Morse 16 September 1873
- To J. D. Hooker 19 September [1873]
- From Francis Darwin [19 September 1873]
- From S. V. Wood Jr to Charles Lyell 19 September 1873
- To E. A. Darwin 20 September 1873
- To Nature 20 September [1873]
- To Edward Frankland 21 September [1873]
- To W. W. Baxter 21 September [1873]
- From Edward Frankland 22 September 1873
- From J. D. Hooker [23 September 1873]
- From John Murray 23 September [1873]
- To Edward Frankland 23 September 1873
- To Charles Lyell 24 September 1873
- To John Murray 24 September [1873]
- To Fritz Müller 25 September 1873
- To Ernst Haeckel 25 September 1873
- From E. A. Darwin 25 September [1873]
- From G. H. Darwin [25 September – 3 October 1873]
- From John Murray 25 September [1873]
- From W. W. Keen 26 September 1873
- From Hubert Airy 26 [September–November 1873]
- To J. D. Hooker 27 September 1873
- From M. T. Masters 27 September 1873
- From S. V. Wood Jr to Charles Lyell 27 September 1873
- From Edward Frankland 27 September 1873
- To M. T. Masters 29 September [1873]
- To Edward Frankland 29 September 1873
- From S. V. Wood Sr to Charles Lyell 30 September 1873
- From G. H. Darwin [c. 16 October 1873?]
- To Frederick Allen’s agent [October 1873]
- To Karl Marx 1 October 1873
- To J. S. Burdon Sanderson 1 October [1873]
- From S. W. Moore [1 October 1873]
- From Emma Wuttke 1 October 1873
- From G. H. Darwin [before 3 October 1873]
- To G. H. Darwin 3 October [1873]
- From S. W. Moore 3 October 1873
- From G. H. Darwin to Nature 4 October [1873]
- From G. H. Darwin 5 October 1873
- From J. D. Hooker 6 October 1873
- From S. W. Moore 7 October 1873
- To Edward Frankland 7 October [1873]
- From Ernst Haeckel 8 October 1873
- To Alexander Bain 9 October 1873
- From Francis Darwin [before 26 June 1873]
- To W. H. Leggett 10 October [1873]
- From Edward Frankland 10 October 1873
- To Francis Darwin 10 October 1873
- From Francis Darwin [11 October 1873]
- To G. H. Darwin 12 October [1873]
- To Edward Frankland 13 October 1873
- To Horace Darwin [15 October 1873]
- From G. H. Darwin 16 October 1873
- From Edward Frankland 16 October 1873
- From Virginius Dabney 18 October 1873
- To J. D. Hooker 18 October [1873]
- To Edward Frankland 18 October [1873]
- To A. G. Dew-Smith 19 October [1873]
- From J. D. Hooker 20 October 1873
- From C. G. Ehrenberg 20 October 1873
- To John Downing 20 October [1873]
- To G. H. Darwin 21 October [1873]
- To Francis Darwin 22 October 1873
- To J. D. Hooker [before 20 October 1873?]
- To J. D. Hooker 23 October [1873]
- From W. S. Wade 23 October 1873
- To Francis Darwin 23 October [1873]
- To G. H. Darwin 24 [October 1873]
- To J. D. Hooker [before 25 October 1873]
- From J. D. Hooker 25 October 1873
- To John Downing 25 October [1873]
- To J. D. Hooker 26 October [1873]
- From Francis Darwin [26? October 1873]
- To A. O. Kovalevsky 28 October 1873
- From J. D. Hooker 29 October 1873
- To J. D. Hooker 30 October [1873]
- From W. E. Darwin 30 October 1873
- To J. D. Hooker 31 October 1873
- To Herbert Spencer 31 October [1873]
- From John Fiske 31 October 1873
- From Godfrey Wedgwood [November 1873]
- From Emma Darwin to G. S. Ffinden [22? November 1873]
- To Down School Board [after 29 November 1873]
- From J. D. Hooker [1 November 1873]
- From Gerard Krefft 1 November 1873
- From Alfred Moschkau 2 [December] 1873
- From T. H. Huxley 3 November 1873
- To [J. P. Thomasson] 3 November 1873
- To John Fiske 3 November [1873]
- To Virginius Dabney 3 November 1873
- From Gerard Krefft 3 November 1873
- To J. D. Hooker 3 November [1873]
- To T. H. Huxley 4 November 1873
- From J. D. Hooker 4 November 1873
- From J. T. Moggridge 4 November 1873
- To J. D. Hooker 6 November [1873]
- To J. D. Hooker 6 November 1873
- From H. M. Butler to Francis Galton 7 November 1873
- From Alfred Moschkau 10 November 1873
- To Edward Frankland [10 November 1873]
- From F. M. Balfour 11 November 1873
- From J. J. Weir 13 November 1873
- From John Downing 13 November 1873
- From W. D. Crotch 14 November 1873
- To G. H. Darwin 15 November [1873]
- To J. S. Burdon Sanderson 15 November [1873]
- From H. W. Bates 15 November 1873
- To H. W. Bates 16 November [1873]
- To J. D. Hooker [9 November 1873]
- To Friedrich Hildebrand 16 November [1873]
- To J. V. Carus 17 November [1873]
- To G. H. Darwin [17 November 1873]
- To A. R. Wallace 17 November 1873
- From J. D. Hooker [8 November 1873]
- From A. R. Wallace 18 November 1873
- To A. R. Wallace [18 November 1873]
- From Valentin Salzmann 18 November 1873
- To A. R. Wallace 19 November [1873]
- To J. S. Burdon Sanderson 19 November [1873]
- From A. R. Wallace [19 November 1873]
- To G. H. Darwin 20 November 1873
- From G. H. Darwin to Emma Darwin [before 24 November 1873]
- To J. D. Hooker 24 November 1873
- To G. H. Darwin 24 November 1873
- From J. D. Hooker 25 November 1873
- From William Bowman 26 November 1873
- To William Bowman 27 November [1873]
- To ? 28 November [1873]
- From G. G. Bianconi 28 November 1873
- To W. Thistleton-Dyer [December? 1873?]
- To T. H. Farrer 1 December [1873]
- From T. L. Brunton 2 December 1873
- To T. L. Brunton 3 December 1873
- From T. H. Huxley 3 December 1873
- To Richard Fordman 4 December [1873]
- To W. T. Thiselton-Dyer 4 December 1873
- From Jonathan Peel 4 December 1873
- To T. H. Huxley 5 December [1873]
- From W. T. Thiselton-Dyer 6 December 1873
- From Hubert Airy 7 December 1873
- From Richard Strachey 9 December 1873
- To Richard Strachey 10 December [1873]
- To Jonathan Peel 10 December [1873]
- To F. S. B. François de Chaumont 17 December [1873]
- To J. E. Lee 17 December 1873
- To Smith, Elder & Co 17 December [1873]
- From Alfred Moschkau 17 December 1873
- From T. H. Huxley [13 November 1873]
- To Alfred Moschkau 19 December 1873
- To Down School Board 19 December 1873
- To Eduard Koch 20 December [1873]
- To J. D. Hooker 20 December [1873]
- From J. L. H. Down 20 December 1873
- To W. T. Thiselton-Dyer 22 December 1873
- From G. S. Ffinden to Emma Darwin 24 December 1873
- From James Crichton-Browne 27 December 1873
- From J. L. H. Down 18 December 1873
- To C. G. Ehrenberg 30 December 1873
- To James Crichton-Browne 30 December 1873
- From H. H. Howorth 31 December 1873
- From C. S. Tomes [before 16 February 1874]
- From Leonard Darwin [before 27 June 1874]
- From W. de W. Abney to Leonard Darwin [before 27 June 1874]
- From E. A. Darwin [c. 22 November 1875]
- From Francis Darwin [after March 1873]
- From Francis Darwin [after March 1873]
- From L. C. Wedgwood [22 September 1866]
- From W. E. Darwin [before 18 June 1874]
- From Leonard Darwin to W. de W. Abney [before 27 June 1874]
- From F. M. Balfour [20 March – 14 April 1875]
- From Thomas Aitken [c. 25 June 1874]
- From W. J. L. Wharton [15 September 1874 or later]
- DCP-LETT-9206
- To W. E. Gladstone [before 16 January 1873]
- From George Cupples [after 5 March 1874]
- From M. C. Stanley [16 November 1871]
- To M. C. Stanley [18 November 1871]
- From H. H. Howorth [27 January 1874]
- From G. H. Darwin [24 October 1874 or later]
- From J. D. Hooker [1874?]
- From John Cattell [after 5 May 1860]
- From J. S. B. Sanderson [1874]
- To T. L. Brunton [1874–5?]
- To Henry Edwards [after 26 December 1875]
- To ? [1874–5?]
- To Francis Darwin [17 September 1874]
- To William Ogle [4 December 1874, 10 December 1875, 17 December 1875, or 12 January 1877]
- To Francis Darwin [September 1875 or later?]
- To Francis Darwin [c. February 1875?]
- To G. H. Ford [before 4 April 1874]
- To G. H. Darwin 12 [December 1874 or January 1875?]
- To ? 1 January 1874
- To Fritz Müller 1 January 1874
- To B. W. Richardson [before 30 May 1879]
- To ? 3 January 1874
- From W. E. Darwin [1869–75]
- From E. P. T. Houk 3 January 1874
- From B. J. Sulivan 5 January 1874
- To James Crichton-Browne 5 January 1874
- To William Waring 6 January 1874
- To B. J. Sulivan 6 January [1874]
- To ? 8 June 1874
- To J. D. Hooker 8 January 1874
- From Hubert Airy 8 January 1874
- From Alpheus Hyatt 8 January [1875]
- To Smith, Elder & Co. 8 January 1874
- To Horace Darwin 9 January [1874]
- From William Waring 9 January 1874
- To Andrew Clark 10 January [1874]
- To [Walter Besant?] 10 January [1872–4]
- To John Murray [1 March 1871]
- To William Waring 12 January [1874]
- To T. N. Staley 13 January [1874]
- To Charles Lyell [13 January 1874]
- To C. L. Denison 14 January 1874
- From Robert Swinhoe 14 January 1874
- From H. T. Stainton 15 January 1874
- From William Dealtry 16 January 1874
- From C.-F. Reinwald 17 January 1874
- From C. L. Denison 17 January [1874]
- To J. D. Hooker 18 January [1874]
- From J. V. Carus 19 January 1874
- From J. H. Martin 19 January 1874
- To C. L. Denison 19 January [1874]
- From J. D. Hooker 20 January 1874
- From V. O. Kovalevsky 20 January 1874
- To superintendent of a lunatic asylum 20 January 1874
- To J. V. Carus 21 January 1874
- From [T. H. Maxwell] to G. H. Darwin [22 January 1874]
- To C. G. Semper 21 January [1874]
- To V. O. Kovalevsky 24 January [1874]
- From I. L. Roberti 24 January 1874
- From C. G. Semper 25 January 1874
- From T. H. Huxley 27 January 1874
- From V. O. Kovalevsky 27 January 1874
- From American Academy of Arts and Sciences 28 January 1874
- From G. H. Darwin to Henry Rayner 28 January 1874
- To T. H. Huxley 29 January [1874]
- From John Downing 29 January 1874
- From G. H. Darwin 31 January 1874
- From D. Appleton & Co. 1 February 1874
- From K. S. Sievert 1 February 1874
- From George Cupples 3 February 1874
- From J. F. McLennan 3 February 1874
- From C.-F. Reinwald 4 February 1874
- To W. B. Tegetmeier 5 February 1874
- To H. W. Bates 6 February 1874
- From G. H. Darwin 6 February 1874
- From J. C. Symmes 6 February 1874
- From E. A. Darwin 7 February [1874?]
- From R. F. Cooke 7 February 1874
- From O. G. Rejlander 7 February 1874
- From B. J. Sulivan 7 February 1874
- From George Cupples 7 February 1874
- From H. W. Bates 7 February 1874
- From C. G. Semper 8 February 1874
- From Robert Swinhoe 9 February 1874
- From W. N. Massey to George Cupples 9 February 1874
- From E. L. Williams to George Cupples 10 February 1874
- From George Harris 10 February 1874
- From Fritz Müller [c. January 1874]
- From W. T. Goodale 11 February 1874
- To Nature 11 February [1874]
- To George Harris 12 February 1874
- From Anton Dohrn 12 February 1874
- From T. N. Staley 12 February 1874
- To Albert Günther 12 February 1874
- To Fritz Müller 13 February 1874
- To Anton Dohrn 13 February 1874
- From T. M. Coan 14 February 1874
- From Albert Günther 14 February 1874
- To ? 15 February [1872–4]
- From Hermann Müller 15 February 1874
- To George Harris 16 February [1874]
- To H. B. Tristram 16 February 1874
- From A. S. G. Canning 16 February 1874
- From J. A. Gammie 16 February 1874
- From Thomas Morse to George Cupples 17 February 1874
- From W. B. Tegetmeier 17 February 1874
- From Octavius Pickard-Cambridge 17 February 1874
- To G. E. Shuttleworth 17 February [1874]
- To W. B. Tegetmeier 18 February 1874
- To L. D. Blake 18 February 1874
- From John Wright to George Cupples 18 February 1874
- From A. S. G. Canning 18 February 1874
- From G. W. Hickman to G. Cupples 19 February 1874
- To Hugo de Vries 19 February 1874
- To Octavius Pickard-Cambridge [before 20 February 1874]
- To J. P. Cooke 20 February 1874
- To Ludwig Rütimeyer 20 February 1874
- From T. N. Staley 20 February 1874
- From W. F. Rayner to George Cupples 21 February 1874
- From George Cupples 21 February 1874
- To John Lubbock 23 February 1874
- From B. J. Sulivan 23 February 1874
- From William Withers 23 February 1874
- From A. S. G. Canning 23 February 1874
- To W. T. Goodale 26 February [1874]
- From T. N. Staley 25 February [1874]
- To Albert Günther 25 February 1874
- From Albert Günther 26 February 1874
- From George Graham to George Cupples 26 February [1874]
- To H. B. Tristram 26 February [1874]
- From John Lubbock 27 February 1874
- From W. S. Dallas 27 February 1874
- From Eugène Desmarest 27 February 1874
- To Hermanus Hartogh Heijs van Zouteveen 18 February 1874
- From T. L. Brunton 28 February 1874
- From Hermanus Hartogh Heijs van Zouteveen 28 February 1874
- To H. E. Litchfield 21 [March 1874]
- To H. E. Litchfield 27 [March 1874]
- To Edmund Hartnack 1 March 1874
- To T. W. Denby 1 March 1874
- From Leonard Darwin 1 March 1874
- To the Royal Society of London 2 March [1874]
- To H. B. Tristram 3 March [1874]
- From J. D. Hooker 3 March 1874
- From F. E. Abbot 3 March 1874
- To J. D. Hooker 4 March [1874]
- To T. L. Brunton 4 March 1874
- To Eugène Desmarest 4 March 1874
- From J. W. Robertson to George Cupples 4 March 1874
- To Walter White [3? March 1874]
- From T. H. Huxley 6 March 1874
- From P. F. Perfil’eva 22 February 1874
- To Anton Dohrn 7 March 1874
- From J. T. Moggridge 7 March 1874
- To J. V. Carus 8 March [1874]
- To a member of the Athenaeum Club 9 March [1874]
- To Thomas Woolner 9 March 1874
- To John Tyndall 9 March [1874]
- To Alfred Newton 9 March [1874]
- From T. L. Brunton 9 March 1874
- To William Bowman 9 March [1874]
- To George Bentham 9 March [1874]
- To Edward Frankland 9 March [1874]
- From Alfred Newton 10 March 1874
- To J. T. Moggridge 10 March 1874
- To A. W. Bennett 11 March [1873]
- To ? 11 March 1874
- From Albert Wigand 11 March 1874
- To P. F. Perfil’eva 11 March 1874
- To Alfred Newton 12 March [1874]
- From Prior Purvis 12 March 1874
- From George Cupples 12 March 1874
- From Hubert Airy 13 March 1874
- From Alfred Newton 13 March 1874
- To Alfred Newton 14 March 1874
- From John Phillips 14 March 1874
- From A. P. Fletcher 14 March 1874
- To A. P. Fletcher [after 14 March 1874]
- From J. V. Carus 15 March 1874
- From Alfred Newton 15 March 1874
- From E. A. Darwin 17 [March 1874]
- To Albert Wigand 17 March 1874
- From Henryk Stecki 18 March 1874
- To J. V. Carus 19 March [1874]
- To J. S. Burdon Sanderson 21 March 1874
- To John Struthers 21 March 1874
- From T. M. Reade 21 November 1874
- From J. S. Burdon Sanderson 23 March [1874]
- From J. D. Hooker 24 March 1874
- To J. D. Hooker 25 March [1874]
- To J. D. Hooker 27 [March 1874]
- To Smith, Elder & Co. 27 March [1874]
- From Emile Alglave 27 March 1874
- To T. H. Huxley 28 March [1874]
- To F. E. Abbot 30 March 1874
- DCP-LETT-9378
- From J. S. Burdon Sanderson 30 March [1874]
- To John Phillips 31 March [1874]
- From T. H. Huxley 31 March 1874
- To J. S. Burdon Sanderson 31 March [1874]
- To Albert Wigand 31 March 1874
- From G. J. Romanes to Herbert Spencer [April 1874]
- To A. C. H. Gordon April 1874
- To Albert Günther [c. 2 March 1874]
- To John Lubbock, P. L. Sclater, Charles Lyell, W. B. Carpenter, and Michael Foster [7 April 1874]
- From T. G. Appleton 2 April 1874
- From John Lubbock 2 April 1874
- To John Lubbock 3 April 1874
- To W. T. Thiselton-Dyer 4 April 1874
- To John Murray 4 April 1874
- To W. B. Tegetmeier [before 5 April 1874]
- To W. B. Tegetmeier 5 April 1874
- From J. V. Carus 5 April 1874
- From W. W. Reade 6 April [1874]
- To Nature 6 April [1874]
- From Anton Dohrn 6 April 1874
- To J. D. Hooker 7 [April 1874]
- From Michael Foster 7 April [1874]
- From Emma Darwin to Albert Günther 7 April [1874]
- To R. F. Cooke 8 April 1874
- From Henry Cecil 9 April 1874
- To T. H. Farrer 10 April 1874
- From Berry Benson 10 April 1874
- To R. F. Cooke 10 April [1874]
- To Enrico Morselli 10 April 1874
- To John Murray 12 April 1874
- From Leonard Rudd 12 April 1874
- To Edward Frankland 12 April 1874
- To ? 12 April 1874
- To Williams & Norgate 13 April [1874]
- From William Waring 13 April 1874
- To William Waring 13 April 1874
- From T. H. Huxley 14 April 1874
- To W. T. Thiselton-Dyer 15 April 1874
- From Edward Frankland 15 April 1874
- From T. H. Huxley to Anton Dohrn 15 November 1873
- From T. H. Huxley 16 April 1874
- To Anton Dohrn 16 April and 9 August 1874
- To W. M. Hacon 16 April [1874]
- To Edward Frankland 17 April 1874
- To Leonard Rudd 18 April [1874]
- From G. H. Darwin 18 April 1874
- To Nature 18 April [1874]
- To G. H. Darwin 19 April [1874]
- To Henry Willett 19 April [1874]
- From G. H. Darwin 20 April 1874
- From Eliza Meteyard 20 April 1874
- From Fritz Müller 20 April [1874]
- To G. H. Darwin [21 April 1874]
- From Henry Cecil 21 April 1874
- To Edward Frankland 22 April [1874]
- From W. T. Thiselton Dyer to Nature [23–30 April 1874]
- DCP-LETT-9424G
- To Michael Foster 23 April [1874]
- From J. H. Gladstone to Nature [23–30 April 1874]
- From H. C. Key to Nature [23–30 April 1874]
- From G. M. Seabroke to Nature [23–30 April 1874]
- From T. R. Stebbing to Nature [23–30 April 1874]
- From E. T. S. [23–30 April 1874]
- From T. M. Story-Maskelyne 4 May 1874
- From Charles Lyell 24 April 1874
- To Michael Foster 25 April [1874]
- From J. S. Burdon Sanderson 25 April 1874
- From C. J. Monro 26 April 1874
- From W. B. Dawkins 26 April 1874
- From Edward Frankland 26 April 1874
- From A. S. G. Canning 27 April 1874
- From Albert Günther 28 April 1874
- To Edward Frankland 28 April [1874]
- From F. S. B. François de Chaumont 29 April 1874
- To C. H. Merriam 29 April 1874
- To F. S. B. François de Chaumont 30 April 1874
- From Edward Frankland 30 April 1874
- From J. M. Grandclément [May 1874]
- From W. W. Keen [May–June? 1874]
- From Leonard Darwin 3 May 1874
- To F. S. B. François de Chaumont 4 May 1874
- To Easton and Anderson 4 May [1874]
- To J. S. Burdon Sanderson 5 May [1874]
- From J. F. McLennan 5 May 1874
- From T. M. Reade 7 May 1874
- To Nature 7 and 11 May [1874]
- To Béla Weisz 8 May 1874
- From W. D. Fox 8 May [1874]
- From J. F. McLennan 8 May 1874
- From Michael Foster [before 9 May 1874]
- To William Crookes 9 May [1874]
- To T. M. Reade 9 May 1874
- To John Murray 9 May [1874]
- To Michael Foster 9 May [1874]
- To T. L. Brunton 11 May 1874
- To W. D. Fox 11 May [1874]
- From Asa Gray 12 May 1874
- From J. S. Burdon Sanderson 12 May [1874]
- To J. S. B. Sanderson [after 12 May 1874]
- From J. F. McLennan 13 May 1874
- To Norman Lockyer 13 May [1874]
- To J. S. Burdon Sanderson 14 May 1874
- From E. E. Klein 14 May 1874
- To Edward Frankland 14 May [1874]
- From C. H. Merriam 19 May 1874
- To Carl du Prel 19 May 1874
- To Edward Frankland 20 May [1874]
- From J. V. Carus 22 May 1874
- To J. V. Carus 23 May [1874]
- From G. E. Dobson 23 May 1874
- From G. S. Anderson 24 May 1874
- To G. E. Dobson 25 May [1874]
- To T. L. Brunton 25 May [1874]
- From V. O. Kovalevsky 25 May 1874
- From J. S. Burdon Sanderson 26 May [1874]
- To J. C. Kemp [26 May 1874]
- To G. H. Darwin 27 May [1874]
- To J. S. Burdon Sanderson 27 May [1874]
- To G. H. Darwin [29 May 1874]
- From G. H. Darwin 30 May 1874
- To Gaston de Saporta 30 May 1874
- To Charles Lyell 31 May [1874]
- From W. T. Thiselton-Dyer 31 May 1874
- From J. M. Grandclément [after 15 June 1874]
- To C. H. Merriam 1 June 1874
- To Asa Gray 3 June [1874]
- To W. T. Thiselton-Dyer 4 June 1874
- To I. L. Donnelly 5 June [1874]
- To Asa Gray 5 June [1874]
- From W. T. Thiselton-Dyer 5 June 1874
- From Mary Treat 8 June 1874
- To W. C. Marshall 8 June [1874]
- To W. T. Thiselton-Dyer 9 June 1874
- To G. H. Darwin 10 June 1874
- From J. T. Moggridge 11 June 1874
- To J. S. Burdon Sanderson 12 June 1874
- To J. T. Moggridge 12 June [1874]
- To John Murray 13 June [1880]
- From Asa Gray 16 June 1874
- From R. F. Cooke 16 June 1874
- From Ferdinand von Mueller 16 June 1874
- To J. V. Carus 17 June [1874]
- To R. F. Cooke 17 June [1874]
- From Joseph Fayrer 17 June 1874
- From Michael Foster 17 June [1874]
- To W. D. Fox 18 June 1874
- From W. W. Keen 18 June 1874
- From Asa Gray 19 June 1874
- From J. S. Burdon Sanderson 19 June 1874
- From H. W. Jackson 20 June 1874
- To J. S. Burdon Sanderson 21 June [1874]
- To Mary Treat 22 June 1874
- From T. M. Coan 22 June 1874
- From W. D. Fox 22 June [1874]
- To W. T. Thiselton-Dyer 23 June 1874
- From T. C. Copland 23 June 1874
- From T. H. Huxley 25 June 1874
- To Asa Gray 25 June 1874
- From John Ball 25 June [1874]
- To Joseph Fayrer [before 25 June 1874]
- From W. T. Thiselton-Dyer 25 June 1874
- From Joseph Fayrer 25 June 1874
- To John Ralfs [after 25 June 1874]
- To W. T. Thiselton-Dyer 26 June 1874
- From W. T. Thiselton-Dyer 26 June 1874
- From J. S. Burdon Sanderson 26 June [1874]
- From Leonard Darwin to Emma Darwin [after 26 June – 28 September 1874]
- To John Ball 26 June 1874
- From Eliza Meteyard 27 June 1874
- To David Moore 28 June 1874
- To Asa Gray 30 June [1874]
- From Joseph Fayrer 30 June 1874
- From John Price [27 July 1874]
- To J. D. Hooker [before 15 July 1874]
- To Francis Darwin [July 1874 – September 1876]
- To [W. W. Baxter?] [early July 1871]
- From L. C. Harrison to Emma Darwin [before 1 July 1874]
- To W. E. Darwin 1 July [1874]
- From J. D. Hooker 1 July 1874
- To W. T. Thiselton-Dyer 1 July 1874
- To Joseph Fayrer [1–3 July 1874]
- From L. C. Harrison [1 July 1874]
- To J. D. Hooker 2 July 1874
- From J. D. Hooker 3 July 1874
- To T. H. Farrer 4 July [1874]
- To J. D. Hooker 4 July 1874
- To Joseph Fayrer 4 July [1874]
- From Joseph Fayrer 6 July 1874
- To John Ralfs 8 July 1874
- From Amy Ruck to Francis Darwin? 6 July 1874
- To F. C. Donders 7 July 1874
- From J. V. Carus 7 July 1874
- From J. D. Hooker 8 July 1874
- From E. B. Baxter 8 July 1874
- To J. V. Carus 9 July [1874]
- From John Ralfs 9 July 1874
- From David Moore 9 July 1874
- From E. E. Klein 10 July 1874
- From G. J. Romanes 10 July 1874
- To David Moore 12 July 1874
- From F. C. Donders 12 July 1874
- To John Ralfs 13 July [1874]
- To F. C. Donders 15 July 1874
- From J. D. Hooker 15 July 1874
- To Donders [after 15 July 1874]
- To G. J. Romanes 16 July 1874
- To J. D. Hooker 16 July 1874
- From T. L. Marshall 16 July [1874]
- From J. D. Hooker 16 July [1874]
- From J. D. Hooker 18 July 1874
- From W. E. Darwin [19? July 1874]
- To J. D. Hooker 20 July [1874]
- From J. D. Dana 21 July 1874
- From D. A. Spalding 21 July 1874
- From J. D. Hooker 22 July 1874
- From Joseph Fayrer 22 July 1874
- To Edward Frankland 22 July 1874
- To J. D. Hooker 23 July [1874]
- To W. E. Darwin 24 [July 1874]
- From T. L. Brunton 23 July [1874]
- To W. T. Thiselton-Dyer 24 [June 1874]
- From G. J. Romanes 24 July 1874
- From E. E. Klein 24 July 1874
- To John Price 27 [July 1874]
- To Francis Darwin [c. 27 July 1874]
- To W. T. Thiselton-Dyer 27 [June 1874]
- DCP-LETT-9567
- To G. H. Darwin [27 July 1874]
- To G. J. Romanes 28 July [1874]
- To John Price 28 July [1874]
- To W. T. Thiselton-Dyer 28 [June 1874]
- From Thomas Belt 28 July 1874
- DCP-LETT-9573
- From John Murray 29 July [1874]
- From G. H. Darwin 29 July 1874
- To G. H. Darwin [30 July 1874]
- To J. T. Knowles 31 July 1874
- To Thomas Belt 31 July 1874
- DCP-LETT-9579
- To G. H. Darwin 1 August [1874]
- To G. E. Paget 1 August 1874
- From H. H. Bancroft 3 August 1874
- From J. T. Knowles 4 August 1874
- To W. D. Whitney 5 August 1874
- To J. T. Knowles 5 August 1874
- From G. H. Darwin 5 August 1874
- From H. M. Wilkinson 5 August 1874
- From John Tyndall 5 August 1874
- To G. H. Darwin [5 or 6 August 1874]
- DCP-LETT-9589
- From Leyson Lewis [before 6 August 1874]
- From G. H. Darwin 6 [August] 1874
- From M. T. Masters 6 August 1874
- From G. H. Darwin [6 or 7 August 1874]
- To M. T. Masters 7 August [1874]
- To Quarterly Review 7 August 1874
- From Francis and Amy Darwin 8 August [1874]
- To G. H. Darwin [8 August 1874]
- To John Tyndall 11 August [1874]
- To John Murray 11 August 1874
- To John Tyndall 12 August [1874]
- From John Murray 12 August 1874
- From D. T. Gardner 13 August 1874
- To D. T. Gardner [c. 27 August 1874]
- From J. D. Hooker 17 August 1874
- From Horace Darwin 17 August 1874
- To J. D. Hooker 20 August 1874
- To J. S. Burdon Sanderson 21 August [1874]
- From L. C. Harrison [22 August 1874]
- To Edward Nicholson 26 August [1874]
- From A. V. W. Bikkers 27 August 1874
- From J. A. Gammie 28 August 1874
- From J. D. Hooker [29 August 1874]
- From Henryk Stecki 29 August 1874
- From W. C. Marshall 30 August [1874]
- To J. D. Hooker 30 August [1874]
- To W. C. Marshall [after 30 August 1874]
- To Edward Frankland 31 August 1874
- From J. D. Hooker [after 4 September 1874]
- From Theodosia Marshall [September 1874]
- From James Ross September 1874
- To A. W. Howitt [September 1874]
- To John Lubbock [before 17 September 1874]
- From Charles Lyell 1 September 1874
- From D F. Nevill 2 September [1874]
- To Charles Lyell 3 September [1874]
- To John Lubbock 3 September [1881?]
- From J. S. Burdon Sanderson 3 September [1874]
- From Chauncey Wright 3 September 1874
- To D. F. Nevill 3 September 1874
- From T. L. Brunton 4 September 1874
- From W. C. Marshall 5 September [1874]
- To D. F. Nevill 7 September 1874
- To W. C. Marshall 7 September [1874]
- From D. F. Nevill 8 [September 1874]
- To J. D. Hooker 8 September [1874]
- From H. C. Sorby 9 September 1874
- From John Price 10 September 1874
- To D. F. Nevill 11 September [1874]
- To Mr S. 11 September [1875–81]
- From Japetus Steenstrup [after 11 September 1876]
- From D. F. Nevill [11 September 1874]
- To D. F. Nevill 12 September [1874]
- From ? 13 September 1874
- To James Verrell? 13 September [1874]
- From S. W. Pennypacker 14 September 1874
- From Joseph Simms 14 September 1874
- From J. D. Hooker 15 September 1874
- From John Murray Jr 15 September 1874
- From H. M. Wilkinson 15 September 1874
- From W. J. L. Wharton [15 September 1874]
- From D. F. Nevill 16 [September 1874]
- From Milan Radovanović 17 September 1874
- To D. F. Nevill 18 September [1874]
- To J. D. Hooker 18 September [1874]
- From Abner Haines 19 September 1874
- To J. D. Hooker [20 September 1874]
- To Ernst Haeckel 20 September 1874
- From A. W. Bennett 21 September 1874
- To James Verrell 21 September 1874
- To Chauncey Wright 21 September 1874 and 29 January 1875
- From Thomas Meehan 22 September 1874
- From D. F. Nevill 22 [September 1874]
- To A. W. Bennett 22 September [1874]
- To Charles Lyell 23 September 1874
- From J. D. Hooker 23 September 1874
- From Auguste Forel 23 September 1874
- To T. L. Brunton 25 September 1874
- From Charles Lyell 25 September 1874
- To John Lubbock 26 September [1874]
- To A. W. Bennett 27 September [1874]
- To Auguste Forel 28 September [1874]
- To J. D. Hooker 28 [September 1874]
- From J. D. Hooker 29 September 1874
- To J. D. Hooker 30 [September 1874]
- To J. D. Hooker 1 October [1874]
- From H. W. Bates 1 October 1874
- From F. J. Cohn 4 October 1874
- To James Crichton-Browne 8 October 1874
- To J. S. Burdon Sanderson 9 October 1874
- To J. D. Hooker 9 October 1874
- From Edward Frankland 9 October 1874
- To Thomas Meehan 9 October 1874
- From J. D. Hooker 11 October 1874
- To Edward Frankland 11 October 1874
- From Emma Darwin to J. B. Innes 12 October [1874]
- From Daniel Oliver 12 October 1874
- From J. S. Burdon Sanderson 12 October 1874
- From W. H. M. Christie 12 October 1874
- To F. J. Cohn 12 October 1874
- To J. S. Burdon Sanderson 13 October 1874
- To W. H. M. Christie 13 October [1874]
- To Daniel Oliver 14 October 1874
- To Auguste Forel 15 October 1874
- From J. S. Burdon Sanderson 16 October [1874]
- To W. B. Dawkins 18 October [1874]
- From G. H. Darwin 18 October 1874
- To J. S. Burdon Sanderson 18 October [1873]
- To John Murray 18 October 1874
- To Daniel Oliver 19 October [1874]
- To G. H. Darwin 19 October [1874]
- From G. H. Darwin [8 November 1874]
- From Daniel Oliver 20 October 1874
- To Theodor Eimer 21 October [1873]
- From W. J. Beal 22 October 1874
- From Mary Treat 22 October 1874
- To G. H. Darwin 22 October [1874]
- From Gerard Krefft 22 October 1874
- From G. H. Darwin 24 October 1874
- To G. H. Darwin [24 October 1874]
- To G. H. Darwin 25 [October 1874]
- To A. W. Malm [25 October 1874]
- From Ernst Haeckel 26 October 1874
- To W. W. Baxter 27 October [1874]
- From J. V. Carus 27 October 1874
- From T. L. Brunton [29] October [1874]
- To J. V. Carus 30 October 1874
- To T. L. Brunton 30 October 1874
- From Auguste Forel 31 October 1874
- From T. L. Brunton 2 November [1874]
- To H. K. Rusden [before 27 March 1875]
- To John Fiske 3 November [1874]
- From John Murray 3 November 1874
- From G. H. Darwin [4 November 1874]
- From D. Appleton & Co [c. 19] November 1874
- To John Murray 5 November [1874]
- To G. H. Darwin [20? August 1874]
- To G. H. Darwin 5 November [1874]
- To D. Appleton & Co. 5 November 1874
- To W. J. Beal 9 November 1874
- From F. E. Nipher 10 November 1874
- To J. F. McLennan 10 November [1874]
- From Herbert Spencer 11 November 1874
- To W. G. Kemp 11 November [1874]
- From R. F. Cooke 12 November 1874
- To ? 12 November 1874
- From Auguste Forel 12 November 1874
- From F. T. Köppen 13 November 1874
- From J. D. Hooker [3 December 1874?]
- To Down School Board 16 November 1874
- From R. F. Cooke 17 November 1874
- To F. T. Köppen 18 November 1874
- From J. V. Carus 18 November 1874
- To G. H. Darwin 18 November [1874]
- To ? [9 December 1874, 14 December 1875, or 10 January 1877]
- To Ludwig Noiré 19 November [1874]
- To J. V. Carus 20 November [1874]
- To George King 20 November 1874
- From Martin Ziegler 21 November 1874
- To J. D. Hooker [17 November 1874]
- From E. M. Courtenay 22 November 1874
- From R. B. Sharpe 23 November [1874]
- To R. B. Sharpe 24 November [1874]
- From J. D. Hooker 25 November 1874
- To Leonard Darwin 25 November 1874
- To J. D. Hooker 26 November [1874]
- To G. H. Darwin 27 November [1874]
- From J. D. Hooker 28 November 1874
- To T. H. Farrer 29 November [1874]
- To J. D. Hooker 30 November [1874]
- To J. D. Hooker 2 December [1874]
- From Mary Treat 2 December 1874
- To G. H. Darwin 2 December [1874]
- To Thomas Belt 3 December [1874]
- From G. H. Darwin 5 December 1874
- To H. A. Huxley [5 December 1874]
- From A. R. Wallace 6 December 1874
- From W. G. Walker 6 December 1874
- To G. H. Darwin [6 December 1874]
- To G. J. Romanes [7 December 1874]
- From T. H. Huxley 8 December 1874
- To John Fiske 8 December [1874]
- From J. D. Hooker 8 December 1874
- To F. C. Noll 8 December [1874]
- To G. J. Romanes [9 December 1874]
- From C.-F. Reinwald 10 December 1874
- To C.-F. Reinwald [12 December 1874]
- From Asa Gray 11 December 1874
- From F. E. Nipher 11 December 1874
- To Theodor Eimer 12 December 1874
- From Arnold Dodel 13 December 1874
- To J. D. Hooker 14 December 1874
- To John Murray 14 December 1874
- To St. G. J. Mivart 14 December 1874
- To John Lubbock 15 December [1874]
- From O. G. Rejlander 15 December 1874
- To G. J. Romanes 16 December 1874
- From George King 18 December 1874
- To Daniel Oliver 18 December 1874
- From W. W. Reade 18 December [1874]
- From Daniel Oliver 19 December 1874
- To Henry Sidgwick 19 December 1874
- To J. D. Hooker 20 December 1874
- From Ernst Haeckel 20 December 1874
- From St. G. J. Mivart to T. H. Huxley 20 December 1874
- From J. D. Hooker 21 December 1874
- To T. H. Huxley 22 December [1874]
- To J. D. Hooker 22 December 1874
- From J. D. Hooker 22 December 1874
- To G. J. Romanes 23 December 1874
- From T. H. Huxley 23 December 1874
- From T. H. Huxley To St. G. J. Mivart [23 December 1874]
- To Arnold Dodel 23 December 1874
- To T. H. Huxley 24 December [1874]
- To J. D. Hooker 24 December [1874]
- From Daniel Oliver 24 December 1874
- From St. G. J. Mivart to T. H. Huxley 24 December 1874
- To ? 24 December [1874–81]
- To Asa Gray 25 December 1874
- From J. D. Hooker [26 December 1874]
- To Ernst Haeckel 26 December 1874
- From D. F. Nevill 26 [December 1874]
- To G. J. Romanes 27 December 1874
- To John Tyndall 27 December 1874
- To J. D. Hooker 27 December [1874]
- To Arnold Dodel 27 December 1874
- From John Tyndall 28 December 1874
- From J. D. Hooker 29 December 1874
- To D. F. Nevill 29 December 1874
- To James Crichton-Browne 29 December [1874?]
- To ? [February 1875 or earlier?]
- To Asher & Co. 31 December [1874–81]
- To D. F. Nevill [1874–82]
- From Francis Darwin [1875?]
- From W. T. Thiselton-Dyer [after 20 October 1873?]
- From W. W. Baxter [after 23 August 1872?]
- From W. S. Dallas? [1869–75]
- To E. F. Lubbock [after 24 February 1871]
- To ? [after 17 February 1875]
- To F. J. Cohn 1 January 1875
- To Daniel Oliver 1 January [1875]
- From Octavius March [1875]
- To Octavius March [1875]
- From Daniel Oliver 2 January 1875
- From J. D. Hooker 3 January [1875]
- To J. D. Hooker 3 January [1875]
- To H. E. Litchfield 4 January [1875]
- From J. D. Hooker 5 January 1875
- To F. B. Goodacre 5 January 1875
- To Friedrich Max Müller 5 January 1875
- To Daniel Oliver 6 January [1875]
- From Francis Darwin to Daniel Oliver [after 6 January 1875]
- To T. H. Huxley 6 January 1875
- To J. D. Hooker 6 January [1875]
- From Joseph Fayrer 6 January 1875
- From J. D. Hooker 7 January 1875
- From Friedrich Max Müller 7 January 1875
- To J. D. Hooker 8 January [1875]
- From F. J. Cohn 9 January 1875
- To Ernst Haeckel 11 January [1875]
- To St G. J. Mivart 12 January 1875
- To T. H. Huxley [after 12 January 1875]
- To G. J. Romanes 13 January [1875]
- To F. P. Cobbe [14 January 1875]
- From Emma Darwin to F. P. Cobbe 14 January [1875]
- From J. D. Hooker 14 January 1875
- From G. J. Romanes 14 January 1875
- To T. H. Huxley 14 January 1875
- To J. D. Hooker 15 January [1875]
- From W. B. Dawkins 15 January 1875
- To W. B. Dawkins 16 January [1875]
- From J. D. Hooker 16 January 1875
- To J. D. Hooker 17 January [1875]
- From A. G. Dew-Smith 17 January 1875
- From T. H. Huxley 18 January 1875
- To George Bentham 18 January [1875]
- To A. G. Dew-Smith 19 January [1875]
- To Alpheus Hyatt 21 January [1875]
- From T. H. Huxley 22 January 1875
- To Linnean Society 23 January [1875]
- To John Murray 23 January [1875–82]
- To ? 23 January [1875–82]
- To O. C. Marsh 25 January [1873]
- To B. G. Wilder 26 January [1875]
- To T. H. Huxley 27 January [1875]
- To E. B. Tylor [28 January 1875]
- From E. B. Tylor 29 January [1875]
- To B. A. E. Cookson 30 January 1875
- From George Brownen 30 January 1875
- From Michael Foster 30 January 1875
- From A. W. Malm 31 January 1875
- From D. Appleton & Co 1 February 1875
- From G. G. Bianconi 1 February 1875
- To Gustav Jäger 3 February 1875
- From Anton Bachmaier 4 February 1875
- From J. V. Carus 5 February 1875
- From Albert Günther 6 February 1875
- From J. D. Hooker [7 February 1875]
- To J. V. Carus 7 February 1875
- From Anton Dohrn 7 February 1875
- From G. H. Darwin to James T. Knowles 8 February 1875
- To J. W. Clark 9 February 1875
- To Albert Günther 9 February [1875]
- From J. T. Knowles 9 February 1875
- To J. S. Burdon Sanderson 10 February 1875
- To J. D. Hooker 10 February [1875]
- To G. H. Darwin 10 [February 1875]
- To Anton Dohrn [after 7 February 1875]
- From Mary Treat 11 February 1875
- To Gustaf Retzius 12 February 1875
- From J. S. Burdon Sanderson 12 February 1875
- To Gustavus Fritsche 13 February 1875
- From D. F. Nevill 14 [February 1875]
- From J. W. Draper 15 February 1875
- From J. C. Douglas 14 February 1875
- To D. F. Nevill 15 February 1875
- To John Murray 16 February [1875]
- From ? [16 February 1875]
- To ? 17 February [1875–8]
- From J. D. Hooker 17 February 1875
- From John Murray 17 February [1875]
- From G. C. Robertson 17 February 1875
- To G. C. Robertson 19 February [1875]
- To D. F. Nevill 19 and 21 February [1878]
- To F. B. Goodacre 20 February 1875
- From G. G. Bianconi 22 February 1875
- To J. D. Hooker 23 February 1875
- From James Gibb 23 February 1875
- To A. B. Buckley 23 February 1875
- From J. D. Hooker [24 February 1875]
- To Thomas Belt 24 February 1875
- From Chauncey Wright 24 February 1875
- To Thomas Woolner 24 February 1875
- To Nature 24 February [1877]
- To J. D. Hooker 25 February [1875]
- To George Cupples 25 February 1875
- From T. H. Huxley [4 April 1875]
- From Oswald Heer 1 March 1875
- From George Cupples 1 March 1875
- From Frederic Harrison to G. H. Darwin 1 March 1875
- From Moritz Traube 2 March 1875
- To Moritz Traube 5 March 1875
- To [M. T. Masters?] 7 March 1875
- To Oswald Heer 8 March [1875]
- From G. A. Wolfe 9 March 1875
- To ? 10 March 1875
- To P. P. C. Hoek 11 March 1875
- From A. W. Bennett 12 March 1875
- From Lawson Tait 12 March [1875]
- To Lawson Tait [13–15 March 1875]
- To Chauncey Wright 13 March 1875
- From W. B. Dawkins 14 March 1875
- From John Fiske 15 March 1875
- From Lawson Tait 16 March [1875]
- From E. J. Johnston 16 March 1875
- From J. D. Hooker 17 March 1875
- From Lawson Tait 17 March [1875]
- From R. F. Cooke 19 March 1875
- From Horatio Piggot 20 March 1875
- To Horatio Piggot 20 March [1875]
- To Lawson Tait 20 March [1875]
- From Anton Bachmaier 21 March 1875
- From E. J. Johnston 22 March 1875
- From John Murray 23 March [1875]
- From J. P. Thomasson 23 March 1875
- From A. E. J. Modderman to Charles Darwin and 20 others 24 March 1875
- From Oswald Heer 23 March 1875
- To Lawson Tait 25 March 1875
- From Thomas Burgess 26 March 1875
- From Lawson Tait 27 March [1875]
- To J. D. Hooker 30 March [1875]
- To J. P. Thomasson 30 March 1875
- To Thomas Belt 31 March [1875]
- To T. L. Brunton [4 August 1881]
- To Edward Cardwell [before 29 April 1875]
- To Lyon Playfair [before 29 April 1875]
- From J. S. Burdon Sanderson [12 April 1875]
- From W. E. Darwin [4 April 1875]
- To W. E. Darwin [2 April 1875]
- To G. H. Darwin 2 [April 1875]
- From Thomas Belt 3 April 1875
- From T. H. Farrer 3 April 1875
- To W. E. Darwin [5 April 1875]
- From John Lubbock 5 April [1875]
- To D. F. Nevill 6 April [1876–82]
- To G. J. Romanes 7 April [1875]
- From J. D. Hooker 7 April 1875
- From J. S. Burdon Sanderson 7 April [1875]
- To ? 8 April [1875–82]
- From Lawson Tait 8 April [1875]
- From Federico Delpino 8 April 1875
- To John Lubbock 8 April 1875
- From John Murray 9 April [1875]
- To John Murray 10 April [1875]
- From J. S. Burdon Sanderson 10 April 1875
- To J. S. Burdon Sanderson [11 April 1875]
- From J. S. Burdon Sanderson 12 April [1875]
- To R. B. Litchfield [24 April 1875]
- From Thomas Burgess 13 April 1875
- From Thomas Allen 14 April 1875
- To J. D. Hooker 14 April [1875]
- From Francis Galton 14 April 1875
- From E. F. W. Pflüger 14 April 1875
- To W. T. Thiselton-Dyer 14 April [1875]
- From J. S. Burdon Sanderson 14 April [1875]
- To E. F. W. Pflüger [after 14 April 1875]
- From J. D. Hooker 15 April 1875
- To E. H. Stanley 15 April 1875
- To J. S. Burdon Sanderson 15 and 19 April [1875]
- From J. D. Hooker 16 April 1875
- From J. D. Hooker 17 April 1875
- From J. V. Carus 17 April 1875
- From E. H. Stanley 17 April 1875
- From Federico Delpino 18 April 1875
- To J. S. Burdon Sanderson 18 April 1875
- To J. V. Carus 19 April [1875]
- From W. W. Reade 20 April 1875
- From T. H. Huxley 21 April 1875
- To J. S. Burdon Sanderson 22 April [1875]
- From Thomas Burgess 21 April [1875]
- From R. F. Cooke 21 April 1875
- From G. J. Romanes 21 April 1875
- From J. S. Burdon Sanderson 23 April [1875]
- To R. B. Litchfield 24 April [1875]
- To W. R. S. Ralston 24 April [1875]
- To J. S. Burdon Sanderson 24 [April 1875]
- To J. S. Burdon Sanderson 24 April [1875]
- From T. M. Coan 24 April 1875
- From Humphrey Sandwith 25 April 1875
- To Humphrey Sandwith 26 April 1875
- From W. R. S. Ralston 26 April 1875
- To George Harris 27 April 1875
- From J. S. Burdon Sanderson 28 April [1875]
- From Thomas Allen 29 April 1875
- To John Murray 29 April [1875]
- From Lyon Playfair 29 April 1875
- From Edward Cardwell 29 April 1875
- From the Royal Society for the Prevention of Cruelty to Animals 30 April 1875
- From J. S. Burdon Sanderson 30 April [1875]
- To Francis Darwin 30 April [1875]
- To the Royal Society for Prevention of Cruelty to Animals 3 May 1875
- To ? 31 [May 1875]
- To R. A. Cross May 1875
- From Francis Darwin 1 and 2 May [1875]
- From Francis Darwin [4 May 1875]
- To J. J. Weir 1 May 1875
- To J. S. Burdon Sanderson 1 May [1875]
- From John Murray 1 May [1875]
- To August Weismann 1 and 4 May 1875
- To James Paget 3 May 1875
- To J. S. Burdon Sanderson 3 May 1875
- To John Murray 3 May 1875
- To John Lubbock 3 May [1875]
- To John Lubbock [8 August 1875 or earlier]
- From John Murray 4 May [1875]
- To ? 4 May [1875]
- From E. B. Tylor 4 May 1875
- To John Murray 5 May 1875
- From J. S. Burdon Sanderson 6 May [1875]
- From J. B. Innes 7 May 1875
- To W. D. Whitney 8 May 1875
- From J. S. Burdon Sanderson [8 May 1875]
- From Emma Darwin to W. D. Whitney 9 May [1875]
- To J. B. Innes 10 May [1875]
- From T. C. Brown 12 May 1875
- From James Paget 12 May 1875
- From T. F. Burgers 13 May 1875
- To T. F. Burgers [after 13 May 1875]
- To Lyon Playfair 15 May [1875]
- From G. Chiantore to John Murray 18 May 1875
- From F. F. Hallett 18 May 1875
- To J. M. F. Ludlow 18 May [1875 or 1880]
- To F. F. Hallett [19 or 20 May 1875]
- From T. H. Huxley 19 May 1875
- To T. H. Huxley 21 May 1875
- From Lyon Playfair 21 May 1875
- From F. F. Hallett 21 May 1875
- From Lyon Playfair to Edward Frankland 21 May 1875
- To R. F. Cooke 23 May [1875]
- From J. S. Burdon Sanderson 23 May [1875]
- From R. F. Cooke 24 May 1875
- To Anton Dohrn 24 May 1875
- From E. J. Johnston 24 May 1875
- To T. M. Hughes 24 May 1875
- To Lyon Playfair 26 May 1875
- From R. F. Cooke 26 May 1875
- From Lyon Playfair 27 May 1875
- To Lyon Playfair 28 May [1875]
- From Karl Scherzer 28 May 1871
- From W. F. Segrave 28 May 1875
- To William Marshall 29 May 1875
- From R. F. Cooke 29 May 1875
- To Edward Frankland 29 May [1879]
- To Asa Gray 30 May [1875]
- To C. V. Riley 30 May 1875
- From Anton Dohrn 31 May 1875
- To Linnean Society 1 January [1875]
- From Francis Galton 2 June 1875
- From William Marshall 2 June 1875
- From Lawson Tait 2 June [1875]
- From Francis Darwin [after 3 June 1875]
- To A. E. J. Modderman 3 June 1875
- From Otto Zacharias 3 June 1875
- To Lawson Tait 4 June [1875]
- From T. H. Huxley 5 June 1875
- From Lawson Tait 5 June [1875]
- From Ernst Haeckel 6 June 1875
- To Lydia Wendland 7 June [1875]
- To Lawson Tait 11 June [1875]
- To Otto Zacharias [11 June 1875]
- From Fritz Schultze 12 June 1875
- From Lawson Tait 12 June [1875]
- From Lawson Tait 12 June [1875]
- To Lawson Tait 13 June [1875]
- To Fritz Schultze 14 June [1875]
- To Lawson Tait [after 17 June 1875]
- From Lawson Tait 16 June [1875]
- From G. Chiantore 16 June 1875
- To J. V. Carus 17 June [1875]
- From R. L. Tait 17 June [1875]
- To Lawson Tait 17 [July 1875]
- To J. D. Hooker 19 June [1875]
- From J. D. Hooker 20 June 1875
- To J. D. Hooker 22 June 1875
- To Linnean Society 23 June 1875
- To R. F. Cooke 24 June [1875]
- From Lawson Tait 24 June [1875]
- From J. W. Clark 25 June 1875
- To C. V. Riley 25 June [1875]
- From R. F. Cooke 26 June 1875
- To Mr Russell 26 June [1875]
- To R. F. Cooke 27 June [1875]
- From J. V. Carus 28 June 1875
- From R. F. Cooke 28 June 1875
- To R. F. Cooke 29 June [1875]
- From J. G. F. Riedel 30 June 1875
- To W. C. Williamson 30 June [1875]
- To F. J. Cohn [30 June 1875]
- To J. V. Carus 1 July [1875]
- To M. T. Masters [July 1875]
- DCP-LETT-10038G
- From D. F. Nevill 2 July [1875]
- DCP-LETT-10039A
- From E. F. Lubbock [after 2 July] 1875
- From R. F. Cooke 3 July 1875
- To R. F. Cooke 4 July [1875]
- From Julius Sachs 4 July 1875
- To J. J. Weir 5 July 1875
- From J. J. Weir 6 July 1875
- From Arnold Dodel 6 July 1875
- To W. T. Thiselton-Dyer 7 July 1875
- From John Lubbock 7 July [1875]
- From James Paget 7 July 1875
- From Herbert Spencer 7 July 1875
- From J. J. Weir 7 July 1875
- To J. J. Weir 8 July [1875]
- From T. S. Baynes 8 July 1875
- From Joseph Fayrer 8 July 1875
- From Rudolph Riemann 9 July 1875
- From J. J. Weir 9 July 1875
- To M. J. Berkeley 10 July 1875
- To J. J. Weir 10 July 1875
- From G. H. Darwin to William Clowes & Sons 11 July 1875
- To M. T. Masters 10 July [1875]
- From T. H. Farrer 11 July 1875
- To G. J. Romanes 12 July [1875]
- To T. H. Farrer 12 July 1875
- From W. T. Thiselton-Dyer 12 July 1875
- To Mr Russell 12 July 1875
- From M. J. Berkeley 13 July 1875
- From D. F. Nevill 13 [July 1875]
- To J. J. Weir 14 July 1875
- From G. J. Romanes 14 July 1875
- From Lawson Tait 15 July [1875]
- From Alphonse de Candolle 15 July 1875
- From William Clowes & Sons 15 July 1875
- To D. F. Nevill 15 July [1875]
- To R. D. Fitzgerald 16 July 1875
- To J. S. Burdon Sanderson 16 July 1875
- From a lady [before 17 July 1875]
- From R. F. Cooke 16 July 1875
- From Charlotte Papé 16 July 1875
- From W. D. Fox 16 July [1875]
- To A. W. Bennett 17 July [1875]
- From G. H. Darwin to William Clowes & Sons 17 July 1875
- To Friedrich Hildebrand 17 July 1875
- To Ludwig Rütimeyer 17 July 1875
- To G. J. Romanes 18 July 1875
- From William Clowes & Sons 19 July 1875
- From W. K. Parker 18 January 1878
- To Georg von Seidlitz 17 July 1875
- From Lawson Tait 19 July [1875]
- DCP-LETT-10079
- To Lawson Tait 20 July [1875]
- From G. J. Romanes 20 July 1875
- From the Kaiserliche Akademie der Wissenschaften 20 July 1875
- To the Kaiserliche Akademie der Wissenschaften [after 20 July 1875]
- To W. T. Thiselton-Dyer 21 July 1875
- From A. R. Wallace 21 July 1875
- From Lawson Tait 21 July [1875]
- From Francis Darwin to Lawson Tait 22 July [1875]
- To A. R. Wallace 22 July [1875]
- From W. T. Thiselton Dyer 23 July 1875
- From J. H. Gilbert 24 July 1875
- From J. H. Gilbert to W. T. Thiselton Dyer 24 July 1875
- To J. D. Hooker 25 July 1875
- From Ludwik Masłowski to [John Murray?] 25 July 1875
- From A. M. Lane Fox to E. F. Lubbock 25 July [1875]
- From Friedrich Hildebrand 26 July 1875
- From J. D. Hooker 27 July 1875
- To Annie Dowie 27 July 1875
- From Annie Dowie [after 27 July 1875]
- To H. A. Huxley 28 July 1875
- To Friedrich Hildebrand 28 July [1875]
- From Asa Gray 29 July 1875
- From R. F. Cooke 29 July 1875
- From Anton Dohrn 29 July 1875
- From Giovanni Canestrini 29 July 1875
- From J. D. Hooker [29 July 1875]
- From J. D. Hooker [30 July 1875]
- From R. F. Cooke 31 July 1875
- To Annie Dowie 1 August [1875]
- From R. F. Cooke 3 August 1875
- From A. M. Lane Fox 3 August 1875
- To Annie Dowie 4 August [1875]
- From R. F. Cooke 6 August 1875
- From Hermann Müller 7 August 1875
- To W. B. Tegetmeier 8 August [1875]
- From R. F. Cooke 9 August 1875
- From R. F. Cooke 10 August 1875
- From Annie Dowie 10 August [1875]
- To J. H. Gilbert 11 August 1875
- To Eduard Suess 11 August 1875
- From R. F. Cooke 12 August 1875
- From James Paget 14 August 1875
- To W. B. Tegetmeier 15 August [1875]
- To Annie Dowie 16 August [1875]
- From J. D. Hooker 16 August 1875
- From D. Appleton & Co. 16 August 1875
- To W. D. Fox 14 August [1875]
- From Lawson Tait 16 August 1875
- From Ernst von Hesse-Wartegg 16 August 1875
- To J. D. Hooker 18 August [1875]
- To ? 18 August 1875
- From Édouard van Beneden 18 August 1875
- To J. V. Carus 19 August 1875
- From Otto Zacharias 19 August 1875
- To G. H. Darwin [19 August 1875]
- From G. H. Darwin 20 August 1875
- From William Marshall 21 August 1875
- From F. J. Cohn 21 August 1875
- From Hensleigh Wedgwood [22 August 1875]
- To Osbert Salvin 22 August [1875]
- To Anthelme Thozet 22 August 1875
- To A. G. Butler 23 August 1875
- From A. G. Butler 24 August 1875
- To F. J. Cohn 24 August 1875
- From R. F. Cooke 27 August 1875
- From E. A. Clowes 27 August 1875
- To T. M. Story-Maskelyne 27 August [1875–81]
- From F. J. Cohn 28 August 1875
- To R. F. Cooke 29 August [1875]
- From R. F. Cooke 30 August 1875
- From Samuel Newington 30 August 1875
- From George Rolleston 30 August 1875
- From Joseph Fayrer 31 August 1875
- To Samuel Newington 1 September [1875]
- To W. D. Whitney 1 September 1875
- To Joseph Fayrer 1 September 1875
- From E. A. Darwin to Emma Darwin 1 September [1875?]
- To R. F. Cooke 1 September [1875]
- From Samuel Newington 2 September 1875
- From A. J. Stuart 2 September 1875
- To George Rolleston 2 September [1875]
- To F. J. Cohn 2 September 1875
- From R. F. Cooke 3 September 1875
- From F. J. Morphy 6 September 1875
- From Lawson Tait 7 September [1875]
- From Francis Darwin [1 September 1875 or later]
- To Lawson Tait 10 September [1875]
- From Federico Delpino 11 September 1875
- From Fritz Müller 12 September 1875
- To G. H. Darwin 13 September [1875]
- From Francis Darwin [15–18 September 1873]
- From M. C. Stanley 14 September 1875
- From J. W. Clark 16 September 1875
- To H. B. Wheatley? 16 September [1875–81]
- To Samuel Newington 17 September 1875
- From Woodward Emery 17 September 1875
- From R. D. Fitzgerald 20 September 1875
- From Ernst von Hesse-Wartegg 20 September 1875
- From Francis Galton 22 September 1875
- To Francis Galton 22 September 1875
- To William Ogle 22 September 1875
- From C. E. Norton 22 September 1875
- From William Ogle [23–4 September 1875]
- To ? 23 September [1875–6?]
- To G. J. Romanes 24 September [1875]
- From Francis Galton 24 September 1875
- To J. G. F. Riedel 24 September 1875
- To Francis Galton 25 September 1875
- To William Ogle 25 September 1875
- From N. A. Severtsov 25 September [1875]
- From W. C. Marshall 25 September [1878]
- From W. T. Thiselton-Dyer 28 September 1875
- From Oswald Heer 28 September 1875
- From G. J. Romanes 29 September 1875
- To W. T. Thiselton-Dyer 30 September 1875
- To Lawson Tait 15 August [1875]
- To Francis Darwin [31 August 1875 or later]
- From W. M. Canby 1 October 1875
- From Mr Turner 2 October 1875
- To T. W. Newton 1 October [1875]
- To W. T. Thiselton-Dyer 3 October [1875]
- To Thomas Meehan 3 October 1875
- DCP-LETT-10182
- From R. F. Cooke 5 October 1875
- To R. F. Cooke 6 October 1875
- To C. E. Norton 7 October 1875
- From Emma Darwin to John Tyndall 7 October [1875]
- To G. J. Romanes 8 October 1875
- From R. F. Cooke 8 October 1875
- From Edouard Bergson 10 October 1875
- From D. Appleton & Co. 11 October 1875
- From Lawson Tait 11 October 1875
- From G. H. Darwin 12 October 1875
- From R. F. Cooke 12 October 1875
- To J. D. Hooker 13 October [1875]
- From Friedrich Max Müller 13 October [1875]
- To Edouard Bergson 13 October 1875
- To G. H. Darwin 13 October [1875]
- From J. D. Hooker 14 October 1875
- To J. V. Carus 14 October [1875]
- To Lawson Tait 14 October [1875]
- To J. D. Hooker 15 October [1875]
- To Friedrich Max Müller 15 October [1875]
- From W. T. Thiselton-Dyer [16–22 October 1875]
- From W. E. Darwin 16 October 1875
- To W. T. Thiselton-Dyer 16 October [1875]
- From Thomas Belt 17 October 1875
- From Charles Voysey 18 October 1875
- From J. D. Hooker 19 October 1875
- From W. T. Thiselton-Dyer 20 October 1875
- To John Tyndall 20 October [1875]
- To John Fiske 21 October [1875]
- To J. D. Hooker 21 October [1875]
- To W. T. Thiselton-Dyer 22 October 1875
- From Louis Grenier to John Murray 22 December 1875
- From Louis Grenier 22 December 1875
- From R. F. Cooke 22 October 1875
- To T. H. Huxley 23 October [1875]
- From J. D. Hooker 23 October 1875
- To R. F. Cooke 23 October [1875]
- From Lawson Tait 23 October [1875]
- From John Tyndall 23 October [1875]
- From Hermann Müller 23 October 1875
- From Giovanni Canestrini 22 October 1875
- From Gustavus Fritsche 23 October 1875
- To ? 24 October [1876]
- To John Tyndall 25 October [1875]
- To G. H. Darwin [25 October 1875]
- From R. F. Cooke 25 October 1875
- From G. W. Morehouse 25 October 1875
- From G. H. Darwin [26 October 1875]
- To W. T. Thiselton-Dyer 26 October [1875]
- To Hermann Müller 26 October 1875
- From James Jameson 26 October 1875
- To Gustavus Fritsche 27 October 1875
- From Edward Cardwell 28 October 1875
- To Edward Cardwell 29 October 1875
- To Smith, Elder & Co 30 October 1875
- From T. H. Huxley 30 October 1875
- To Williams & Norgate 1 November [1877–9?]
- To T. H. Huxley 1 November [1875]
- From T. H. Huxley 2 November 1875
- To Francis Galton 2 November [1875]
- From Francis Galton 3 November 1875
- To G. J. Romanes [4 November 1875]
- To G. J. Romanes 4 November 1875
- To Francis Galton 4 November [1875]
- From G. H. Darwin [after 28 March 1876]
- From Francis Galton 5 November 1875
- From Lawson Tait 6 November [1875]
- To Francis Galton 7 November [1875]
- From Ernst Haeckel 7 November 1875
- From A. R. Wallace 7 November 1875
- From Hugo de Vries 7 November 1875
- From G. J. Romanes [before 4 November 1875]
- From Francis Galton 8 November 1875
- To the secretary of the Royal Commission on vivisection 8 November 1875
- To R. F. Cooke 9 November [1875]
- From Arthur Nicols [before 10 November 1875]
- To Arthur Nicols [before 10 November 1875]
- To Francis Galton 10 November [1875]
- From Arthur Nicols 10 November 1875
- To Hugo de Vries 10 November 1875
- To T. H. Huxley 12 November [1875]
- To Ernst Haeckel 13 November 1875
- To Herbert Spencer 13 November 1875
- From W. H. Scott 13 November 1875
- From R. F. Cooke 16 November 1875
- To [W. H. Scott?] 16 November [1875?]
- From Lawson Tait 16 November [1875]
- From Lawson Tait 16 November [1875]
- To R. F. Cooke 17 November 1875
- From Hugo de Vries 17 November 1875
- From John Murray 19 November [1875]
- From J. V. Carus 20 November 1875
- To John Murray 20 November 1875
- From Lawson Tait 20 November [1875]
- To J. V. Carus 22 November [1875]
- From John Murray 22 November [1875]
- From D. Appleton & Co 23 November 1875
- To John Murray 23 November 1875
- From John Murray 23 November [1875]
- From Lawson Tait 23 November [1875]
- From J. D. Hooker 24 November 1875
- To Ernst Haeckel 25 November 1875
- From Lawson Tait 25 November [1875]
- From Francis Galton 26 November 1875
- To the secretary of the Royal Society of London 27 November 1875
- To Lawson Tait 27 November [1875]
- From Quintino Sella 28 November 1875
- From Lawson Tait 29 November [1875]
- From J. D. Hooker [18 April 1876]
- To J. D. Hooker 1 December [1875]
- To Lawson Tait 1 December [1875]
- From W. B. Dawkins 1 December 1875
- From J. D. Hooker 2 December 1875
- From W. R. S. Ralston 2 December 1875
- From Francis Darwin [before 8 December 1875]
- From Francis Darwin [after 2 December 1875]
- From W. R. S. Ralston 3 December 1875
- To Quintino Sella 4 December 1875
- To Thomas Carlyle 4 December 1875
- To August Weismann 6 December 1875
- To W. R. S. Ralston 7 December [1875]
- From Archibald Geikie 7 December 1875
- From Arthur Nicols 8 December 1875
- To Archibald Geikie 9 December 1875
- To Eduard Strasburger 9 December [1876]
- To T. H. Huxley 10 December [1875]
- To J. D. Hooker 10 December [1875]
- From Samuel Newington 10 December 1875
- To J. D. Hooker [12 December 1875]
- To ? [after 11 December 1875]
- From R. F. Cooke 14 December 1875
- From W. E. Darwin [15? December 1875]
- To Daniel Oliver [15 December 1875]
- To W. T. Thiselton-Dyer 16 December [1875]
- To A. W. Bennett 16 December [1875]
- To G. J. Romanes 17 [December 1875]
- From A. W. Bennett 17 December 1875
- To A. W. Bennett [17 December 1875]
- To R. F. Cooke 17 December [1875]
- To Francis Galton 18 December [1875]
- From W. E. Darwin to John Higgins Jr 18 December [1875]
- To J. J. Weir 18 December [1875]
- From G. J. Romanes [before 26 December 1875]
- To W. T. Thiselton-Dyer [19 December 1875]
- From Francis Galton 19 December 1875
- From G. G. Stokes 20 December 1875
- From W. E. Darwin to F. E. Abbot 20 December 1875
- From J. P. Thompson 20 December 1875
- To W. R. S. Ralston 20 December 1875
- To J. V. Carus 21 December [1875]
- From G. H. Darwin to W. D. Whitney 21 December 1875
- From J. V. Carus 21 December 1875
- To G. G. Stokes 22 December 1875
- From Francis Galton to G. H. Darwin 22 December 1875
- From M. C. Stanley 22 December 1875
- To James Crichton-Browne 22 December 1875
- To James Sully 23 December 1875
- To F. S. B. François de Chaumont 23 December 1875
- To A. R. Wallace 23 December 1875
- To J. V. Carus 25 December 1875
- From Fritz Müller 25 December 1875
- To G. J. Romanes 26 December 1875
- To C.-F. Reinwald 26 December 1875
- From Nevil Story-Maskelyne 26 December 1875
- From Henry Edwards 26 December 1875
- From Asa Gray 28 December 1875
- To A. R. Wallace 28 December 1875
- To Otto Zacharias [before 3 January 1876]
- From B. J. Sulivan 29 December 1875
- From J. H. Gilbert 31 December 1875
- To Nevil Story-Maskelyne 29 December 1875
- From F. M. Balfour [c. 31 January 1878?]
- From Nemo [1876?]
- To P. P. C. Hoek [after May 1876]
- To August Weismann [17 June 1876 or later]
- From Sigmund Fuchs [1877–8?]
- To Sigmund Fuchs [1877–8?]
- To G. H. Darwin [after 4 September 1876]
- To ? [1876?]
- From W. T. Thiselton Dyer [1876]
- From W. T. Thiselton-Dyer [20 January 1879]
- To G. H. Darwin [after 25 February 1879]
- From W. E. Darwin [24 April 1877?]
- From Robert Caspary [after 9 June 1866]
- DCP-LETT-10345
- To William Robinson 4 January 1876
- From J. H. Gilbert 6 January 1876
- From John Murray 6 January [1876]
- To G. H. Darwin 8 January [1876]
- From G. H. Darwin [after 8 January 1876]
- To William Robinson 10 January [1876?]
- From Charles O’Shaughnessy 10 January 1876
- From W. H. Dallinger 10 January 1876
- From Hermann Hoffmann 10 January 1876
- To W. H. Dallinger [after 10 January 1876]
- From T. W. Clarke 12 January 1876
- From Ernst Haeckel 13 January 1876
- To Francis Galton 13 January [1876]
- From S. L. Lovén [14 January 1876]
- To Ernst Haeckel 15 January [1876]
- From T. B. Blow 15 January 1876
- From H. B. Smyth 15 January 1876
- From A. S. von Mansfelde 17 January 1876
- To T. H. Farrer 18 January [1874]
- From Francis Darwin [13 December 1875]
- From F. E. Abbot to W. E. Darwin 19 January 1876
- To Ernst Haeckel 21 January [1876]
- To Karl von Scherzer 24 January [1876]
- From James Torbitt 24 January 1876
- From M. T. Masters 24 January 1876
- From W. E. Darwin [before 29 January 1876?]
- From M. T. Masters 26 January 1876
- To James Torbitt 26 January 1876
- To Hubert Airy 27 January [1876?]
- To Asa Gray 28 January 1876
- From J. D. Hooker 28 January 1876
- To Albert Günther 28 January [1877]
- To S. L. Lovén 28 January 1876
- To J. D. Hooker 29 January 1876
- From Ernst Haeckel 31 January and 1 February 1876
- To J. H. Gilbert [before 9 March 1876]
- From John Tyndall 2 February 1876
- To ? 3 February 1876
- To John Tyndall 4 February 1876
- To W. T. Thiselton-Dyer [4 February 1876]
- From John Tyndall 5 February 1876
- From John Tyndall 5 February 1876
- To Eduard Koch? 6 February 1876
- To Società dei Naturalisti di Modena 8 February 1876
- To Fritz Müller [9 February 1876]
- To H. T. Stainton 11 February [1876]
- To A. C. Thomson 11 February 1876
- To A. B. Buckley 11 February [1876]
- To [Post Office Savings Bank] 11 February [1876]
- From A. B. Buckley 12 February 1876
- From S. B. Herrick 12 February 1876
- From Charles and Francis Darwin to W. T. Thiselton-Dyer 14 February [1876]
- To J. J. Weir 14 February [1876]
- To ? 15 February 1876
- From Thomas Moore to W. T. Thiselton-Dyer 15 February 1876
- From Francis Galton 16 February 1876
- From Hermann Müller 16 February 1876
- From Hermann Müller to Francis Darwin 16 February 1876
- From B. J. Edwards & Co. 16 February 1876
- To J. H. Gilbert 16 February 1876
- To Fritz Müller [18 February 1876]
- From D. Appleton & Co. 18 February 1876
- From Charles and Francis Darwin to W. T. Thiselton-Dyer 18 February 1876
- To J. N. Lockyer 18 February [1876]
- From R. F. Cooke 21 February 1876
- From Lawson Tait 21 February 1876
- To Lawson Tait 22 February [1876]
- From R. F. Cooke 23 February 1876
- From Arthur Nicols 24 February 1876
- To Arthur Nicols [after 24 February 1876]
- To ? 25 February 1876
- To Henry Edwards 1 March [1876]
- From Lawson Tait 1 March 1876
- To Francis Galton 2 March [1876]
- To Lawson Tait 2 March 1876
- From J. H. Gilbert 4 March 1876
- To S. B. Herrick 6 March 1876
- To W. E. Darwin 8 March [1876]
- To E. A. Strasburger 9 March 1876
- From J. H. Gilbert 9 March 1876
- From Charles Layton 10 March 1876
- From J. G. Fenwick 17 March 1876
- From J. V. Carus 19 March 1876
- To J. G. Fenwick 19 March 1876
- From J. C. E. Kollmann 19 March 1876
- From G. J. Romanes [c. 19 March 1876]
- To J. V. Carus 21 March 1876
- From J. V. Carus 21 March 1876
- To ? 21 March 1876
- To Ernst von Hesse-Wartegg 22 March 1876
- From H. C. Sorby 22 March 1876
- To J. V. Carus 23 March 1876
- To G. C. Druce 25 April 1876
- To Lawson Tait 25 March [1876]
- From Lawson Tait 26 March [1876]
- From Naphtali Lewy [26 March – 24 April 1876]
- From Lawson Tait 27 March [1876]
- From Robert Bell 28 March 1876
- To Axel Blytt 28 March 1876
- To Lawson Tait 28 March 1876
- From F. J. Cohn 28 March 1876
- To F. J. Cohn 31 March [1876]
- From James Torbitt 1 April 1876
- From T. H. Huxley 3 April 1876
- From Mary Treat 3 April 1876
- To James Torbitt 4 April 1876
- From James Torbitt 6 April 1876
- To James Torbitt 6 April 1876
- From James Torbitt 7 April 1876
- From J. D. Hooker 8 April 1876
- To J. D. Hooker 9 April [1876]
- From J. D. Hooker 11 April 1876
- To Henry Bradshaw 12 April [1876]
- From James Torbitt 12 April 1876
- To G. J. Romanes 14 April 1876
- To Robert Bell 14 April [1876]
- To James Torbitt 14 April 1876
- From G. G. Stokes 14 April 1876
- From J. V. Carus 16 April 1876
- From Hermann Brehmer 17 April 1876
- From P. M. G. Egerton 17 April 1876
- From James Torbitt 18 April 1876
- To J. D. Hooker 19 April [1876]
- From James Torbitt 19 April 1876
- From W. E. Darwin 20 April [1876]
- To Smith, Elder & Co. 20 April [1876]
- From James Geikie 20 November 1876
- To C. S. Wedgwood 20 April 1876
- To G. G. Stokes 21 April [1876]
- To James Torbitt 21 April 1876
- To Mary Treat 21 April [1876]
- To T. C. Eyton 22 April 1876
- From James Torbitt 22 April 1876
- To Bartholomäus von Carneri 22 April 1876
- To Smith, Elder & Co. 22 April 1876
- From Heinrich Goldschmidt and E. v. Portheim 23 April 1876
- To J. V. Carus 24 April 1876
- From W. H. Patterson 24 April 1876
- To Lawson Tait 24 April 1876
- To J. D. Hooker 25 April [1876]
- From G. H. Darwin 25 April 1876
- From Lawson Tait 25 April [1876]
- To Federico Delpino 25 April 1876
- To J. E. Harting 26 April 1876
- To G. J. Romanes 26 April [1876]
- From J. D. Hooker 26 April 1876
- To W. T. Thiselton-Dyer 26 April [1876]
- To G. H. Darwin 27 April [1876]
- To G. J. Romanes 27 April [1876]
- To G. H. Darwin 27 April [1876]
- To Edward Frankland 27 April [1876]
- To Enrique Godínez 28 April 1876
- To G. J. Romanes 29 April [1876]
- To W. T. Thiselton-Dyer 29 April [1876]
- To Lawson Tait 29 April [1876]
- To J. S. Burdon Sanderson 30 April [1876]
- From Margaret Frankland’s diary 30 [April 1876]
- To Francis Darwin [30 April 1876]
- To W. E. Darwin [after 20 November 1876]
- From William Jackson [24–8?] May [1876?]
- From Smith, Elder & Co. 1 May 1876
- From Francis Darwin [1 May 1876]
- From G. H. Darwin 1 May 1876
- To Francis Darwin [1 May 1876]
- From Hubert Airy 2 May 1876
- From Thomas Laxton 2 May 1876
- To C. F. Claus 2 May 1876
- From Francis Darwin 2 May 1876
- To G. H. Darwin 2 May [1876]
- To A. W. von Hofmann 3 May 1876
- From John Michels 3 May 1870
- To Edward Frankland 3 May 1876
- From Hermann Brehmer 4 May 1876
- To the Geological Society of London 5 May 1876
- To Lawson Tait 5 May 1876
- To Nature 6 May [1876]
- From Giovanni Canestrini 6 May 1876
- From Moritz Schiff 8 May 1876
- From Ernst Haeckel 9 May 1876
- To Otto Zacharias 10 May 1876
- From James Murphy 10 May 1876
- To Auguste Daubrée 10 May 1876
- To Auguste Daubrée 13 May [1876]
- To Ernst Haeckel 14 May 1876
- To Smith, Elder & Co. 15 May 1876
- From Mary Treat 15 May 1876
- From Ebenezer Norman 18 May 1876
- From Federico Delpino 19 May 1876
- To ? 19 May 1876
- From Louis Grenier 20 May 1876
- From T. L. Brunton 23 May 1874
- From F. B. Zincke 23 [May 1876]
- To H. E. Wedgwood [28 May 1876]
- To D. J. Wetterhan 25 May [1876]
- To W. D. Fox 26 May [1876]
- To F. B. Zincke 26 May [1876]
- From Francis Darwin 27 May 1876
- From Francis Darwin [1 June 1876]
- From Francis Darwin [29 May 1876]
- From Francis Darwin [28 May 1876]
- To G. J. Romanes 29 May [1876]
- To Francis Darwin 30 [May 1876]
- From Francis Darwin [31 May 1876]
- From James Paget 30 May 1876
- From G. H. Darwin 31 May 1876
- To G. J. Romanes [15 June 1876 or later]
- From Francis Darwin [before 21 May 1877]
- To William Bowman 1 June [1876]
- From G. H. Darwin 1 June 1876
- To Mary Treat 1 June 1876
- From G. J. Romanes 1 June 1876
- To H. W. Weir [before 2 June 1876?]
- To Francis Darwin [1 June 1876]
- To Francis Darwin [2 June 1876]
- From Francis Darwin [2 June 1876]
- To Georg von Giźycki 2 June [1876]
- To G. H. Darwin 2 June [1876]
- To G. J. Romanes 4 June [1876]
- To G. H. Darwin [4 June 1876]
- To A. R. Wallace 5 June 1876
- To John Tyndall 5 June [1876]
- From J. H. Kidder 5 June 1876
- To Edward Frankland [before 6 June 1876]
- From Edward Frankland [before 6 June 1876]
- From W. T. Thiselton-Dyer 6 June 1876
- To Edward Frankland 6 June [1876]
- From A. R. Wallace 7 June 1876
- From Francis Darwin to J. H. Gilbert 8 June 1876
- From J. H. Gilbert to Francis Darwin 10 June 1876
- To S. A. Cecil 8 June 1876
- From G. J. Romanes 11 June [1876]
- To ? 13 June 1876
- To ? 13 June 1876
- To A. R. Wallace 17 June 1876
- To Auguste Forel 19 June 1876
- To James Orton 19 June 1876
- From J. D. Hooker 20 June 1876
- From G. H. Darwin 20 June 1876
- To J. D. Hooker 21 June [1876]
- To J. D. Hooker 22 June [1876]
- To ? 22 June [1875–81]
- From Auguste Forel 23 June 1876
- To the editor of The Times 23 June 1876
- From Francis Walker 24 June [1862]
- From Bruno Schreiber 24 June 1876
- To Bruno Schreiber [after 24 June 1876]
- To A. R. Wallace 25 June 1876
- From Lionel Ashburner 25 June 1871
- To ? 30 June [1875–81]
- To Andrew Clark [late June 1876]
- From G. J. Romanes [after 8 January 1877]
- To John Scott 1 July 1876
- From J. D. Hooker 4 July 1876
- From C. F. Martins 5 July 1876
- From Andrew Clark 8 July 1876
- To Edmund Gurney 8 July 1876
- To C. F. Claus 9 July 1876
- DCP-LETT-10560
- To G. H. Darwin 13 July [1876]
- To J.-B. Liagre 18 July 1876
- To J. N. Hoare 18 July [1875]
- To William Ogle 22 July [1876]
- From A. R. Wallace 23 July 1876
- From William Ogle 23 July 1876
- From Wilhelm Breitenbach 26 July 1876
- From Casimir de Candolle 30 July 1876
- To August Müller Beeck 31 July [1876]
- To Gaston de Saporta 12 August 1876
- To W. T. Thiselton-Dyer 3 August 1876
- From Lawson Tait 4 August [1876]
- To Lawson Tait 6 August 1876
- To Hermann Müller 7 August 1876
- To W. T. Thiselton-Dyer 8 August [1876]
- From Lawson Tait 8 August 1876
- To Asa Gray 9 August 1876
- To J. D. Hooker 10 August 1876
- To Ernst Haeckel 12 August 1876
- To John Lubbock 16 August [1876]
- To R. D. Fitzgerald 18 August [1876]
- From Milan Radovanović 18 August 1876
- From George Rolleston 18 August 1876
- To C. J. Plumptre 19 August [1873?]
- To Smith, Elder & Co. 21 August [1876]
- To Milan Radovanović 25 August [1876]
- To George Rolleston 24 August [1876]
- To Bibliographisches Institut 28 August 1876
- From G. J. Romanes [after 23 September 1876]
- To W. T. Thiselton-Dyer 1 September 1876
- From J. A. Ransome-Marriott 1 September 1876
- From Gaston de Saporta 2 September 1876
- DCP-LETT-10587F
- From P. A. Hanaford 3 September 1876
- From Hermann Müller 4 September 1876
- To G. S. Ffinden 5 September 1876
- To Gaston de Saporta 10 September 1876
- To J. D. Hooker 11 September [1876]
- To W. E. Darwin 11 September [1876]
- To Japetus Steenstrup 11 September 1876
- From Wilhelm Breitenbach 11 September 1876
- To Leonard Darwin 11 September [1876]
- From J. D. Hooker 13 September 1876
- From Johann von Fischer [before 15 September 1876]
- To G. W. Norman 15 September [1876]
- From Johann von Fischer 15 September 1876
- To Ernst Haeckel 16 September 1876
- To W. T. Thiselton-Dyer 16 September 1876
- To R. F. Cooke 16 September 1876
- To Francis Darwin 16 September [1876]
- From J. D. Hooker [24 September 1876]
- To J. D. Hooker 17 September [1876]
- From Thomas Seare 18 September 1876
- To P. M. Duncan 19 September 1876
- To W. C. Marshall 19 September 1876
- To R. F. Cooke 19 September [1876]
- To P. A. Hanaford 19 September 1876
- To George King 19 September 1876
- To Francis Darwin 20 September [1876]
- To W. T. Thiselton-Dyer 22 September [1876]
- To Karl von Scherzer 22 September 1876
- From Emma Darwin to Ernst Haeckel 22 September [1876]
- To W. H. Flower 24 September [1876]
- To Rudolf Schmid 25 September 1876
- To Francis Darwin 25 September [1876]
- To F. J. Cohn 26 September [1876]
- To J. V. Carus 27 September 1876
- From W. H. Flower 27 September 1876
- To Francis Darwin 27 [September 1876]
- From M. L. Baxter 28 September 1876
- From W. E. Darwin 28 September [1876]
- To Francis Darwin [28 September 1876]
- To W. C. Marshall 29 September [1876]
- To W. E. Darwin 29 September [1876]
- To John van der Weyde 29 September 1876
- To J. V. Carus [early October 1876]
- From Otto Zacharias 2 October 1876
- To Francis Darwin 2 October [1876]
- From Francis Darwin [after 2 October 1876]
- From George Cross 4 October 1876
- From Hermann Müller 4 October 1876
- To Otto Zacharias 5 October [1876]
- To George Cross 6 October [1876]
- To William Clowes & Sons 7 October [1876]
- To Francis Darwin 8 October [1876]
- From Francis Darwin [after 8 October 1876]
- From George Cross 9 October 1876
- To M. T. Masters 10 October [1876]
- To Francis Darwin [11 October 1876]
- From Asa Gray 12 October 1876
- From J. I. Rogers 12 October 1876
- To Francis Darwin [12 October 1876]
- From J. D. Hooker 13 October 1876
- To Moritz Wagner 13 October 1876
- To Georg von Seidlitz 13 October 1876
- To J. D. Hooker 17 October [1876]
- To J. V. Carus 18 October [1876]
- From George Henslow 20 October 1876
- To G. H. Darwin 21 October [1876]
- To George Henslow 23 October [1876]
- To R. B. Smyth 23 October 1876
- From George Cross 23 October 1876
- From George Cross 23 October 1876
- To Gustav Jäger 23 October 1876
- From George Henslow 24 October 1876
- To J. D. Hooker 25 October [1876]
- To J. V. Carus 25 October 1876
- To James Geikie 26 October 1876
- To Asa Gray 28 October 1876
- To W. E. Darwin 28 October [1876]
- From J. D. Hooker 29 October 1876
- To W. C. Marshall 30 October [1876?]
- To Anton Kerner von Marilaun 31 October [1876]
- To Nature [before 2 November 1876]
- To E. R. Lankester [after 1 November 1876]
- From H. N. Moseley 3 November 1876
- To Asa Gray 4 [November 1876]
- To H. N. Moseley 5 November 1876
- From J. F. McLennan 7 November 1876
- From H. N. Moseley 7 November 1876
- From Frigyes Medveczky 11 November 1876
- From E. B. Tylor 11 November 1876
- From Asa Gray 12 November 1876
- To E. B. Tylor 12 November 1876
- To August Weismann 13 November 1876
- From J. D. Hooker 14 November 1876
- To John Murray 15 November 1876
- From Peter Henderson 15 November 1876
- From J. W. Judd 15 November 1876
- From Horace Pearce 16 November 1876
- To James Geikie 16 November 1876
- From Charles Voysey 17 November 1876
- From H. N. Moseley [after 17 November 1876]
- From T. H. Huxley 19 November 1876
- To W. E. Darwin 20 November [1876]
- From J. V. Carus 20 November 1876
- To Anton Kerner von Marilaun 20 November 1876
- To Charles Voysey 21 November [1876]
- From Charles Voysey 21 November 1876
- To W. C. Marshall 22 November [1876]
- To H. N. Moseley 22 November [1876]
- To J. V. Carus 23 November 1876
- From Fritz Hoddick 23 November 1876
- From Francis Darwin to Horace Pearce 24 November 1876
- To Asa Gray 27 November 1876
- From G. H. Darwin [27? November 1876]
- From Robert Shaw 28 November 1876
- From Henry Wilson 28 November 1876
- From F. B. Zincke 29 November 1876
- From Thomas Brittain 30 November 1876
- From Francis Galton 1 December 1876
- To Thomas Brittain 1 December 1876
- From Albert Gaudry 2 December 1876
- To Asa Gray 4 December 1876
- To J. J. Weir 4 November 1876
- From Asa Gray 5 December 1876
- To Gerard Krefft 6 December 1876
- From Friedrich Hildebrand 6 December 1876
- From Hermann Müller 6 December 1876
- From A. W. Bennett 7 December 1876
- From T. H. Farrer 7 December 1876
- From J. D. Hooker 8 December 1876
- To George Bentham 8 December 1876
- To G. S. Ffinden 9 December 1876
- From Robert Shaw 10 December [1876]
- From George Bentham 10 December 1876
- To Fritz Müller 11 December 1876
- To J. D. Hooker 11 December 1876
- From F. M. Balfour 11 December 1876
- From F. M. Balfour [14] December [1876]
- From F. M. Balfour [14 December 1876]
- To George Bentham 12 December 1876
- From J. D. Hooker 13 December 1876
- To F. M. Balfour 13 December 1876
- From A. R. Wallace 13 December 1876
- From George Bentham 13 December 1876
- From William Renton 14 December 1876
- To Samuel Smiles 15 December 1876
- To Samuel Smiles 16 December 1876
- To J. D. Hooker 15 December 1876
- To John Scott 15 December 1876
- From Julius von Haast 16 December 1876
- From Robert Shaw 16 December 1876
- From Alphonse de Candolle 16 December 1876
- From Peter Henderson 16 December 1876
- DCP-LETT-10725F
- From Robert Caspary 17 December 1876
- From J. D. Hooker 18 December 1876
- To Asa Gray 20 December 1876
- To ? 21 December 1876
- From G. E. S. Boulger 20 December [1876]
- To J. V. Carus 20 December 1876
- To Walter White [after 31 December] 1876
- From Asa Gray 22 December 1876
- From Emma Darwin to J. B. Innes 24 December [1875]
- To Karl von Scherzer 24 December 1876
- From George Rolleston 26 December 1876
- From E. M. Heckel 27 December 1876
- From Hermann Müller 28 December 1876
- From George Rolleston 29 December 1876
- From Ernst Haeckel 30 December 1876
- To Ernst Haeckel 31 December 1876
- To Édouard Heckel 31 December 1876
- From Allen Thomson 31 December 1876
- From F. J. Cohn 31 December 1876
- From T. H. Farrer 31 December 1876
- From W. E. Darwin [12 or 19 July 1877]
- From Adolphe de Stillfried [1877?]
- To ? [1876]
- To [E. M. Dicey?] [1877]
- To Francis Darwin [before 22 July 1876]
- To D. W. Thompson [before February 1882]
- To Veitch & Sons [before 11 August 1877]
- From [W. T. Thiselton-Dyer] [after 22 September 1877]
- From W. T. Thiselton-Dyer [June 1877 or later]
- To Francis Darwin [c. 20 March 1877]
- From W. E. Darwin [24 August 1877]
- From E. A. Darwin 17 [1877?]
- To W. E. Darwin 20 [August 1877]
- To Julius von Haast [c. 11 February 1877]
- From W. T. Thiselton-Dyer [before 17 January 1877]
- To W. T. Thiselton-Dyer [early 1877?]
- From Alphonse de Candolle January 1877
- To Williams & Norgate [7 July? 1877]
- From Alpheus Hyatt January 1877
- From Thomas Belt [before 18] January 1877
- To Francis Darwin [c. December 1876]
- From Francis Darwin [14 June? 1877]
- From E. A. Darwin [1 January 1877]
- From Arthur Mellersh 1 January 1877
- To Octavian Blewitt 1 January 1877
- From Charles and Francis Darwin to G. J. Romanes 2 January [1877]
- To Alfred Newton 2 January 1877
- From T. A. B. Spratt 2 January 1877
- To Asa Gray 3 January 1877
- To Gardeners’ Chronicle 3 January [1877]
- To G. J. Romanes 4 January 1877
- From Francis Darwin to the Auckland Star 4 January 1877
- From R. F. Cooke 5 January 1877
- From Julius Sachs 6 January 1877
- From George Hodgskin 6 January 1877
- To Francis Galton [6–12 January 1877]
- From Otto Zacharias 7 January 1877
- To Francis Galton 9 January [1877]
- To Howard Miller 10 January 1877
- From Allen Stoneham 11 January 1877
- From G. M. Tracy 11 January 1877
- From H. W. Bates 11 January 1877
- To G. M. Tracy [after 11 January 1877]
- From T. M. Reade 12 January 1877
- From Francis Galton 12 January 1877
- To August Weismann 12 January 1877
- To T. L. Brunton 13 January 1877
- From Emile Alglave 13 January 1877
- To Emile Alglave [after 13 January 1877]
- From Alfred Grugeon 14 January [1877]
- To D. F. Nevill 15 January 1877
- From W. H. Leggett 15 January 1877
- From F. W. Pim 15 January 1877
- From L. E. Becker 16 January 1877
- To R. B. Sharpe? 16 January 1877
- From E. A. Darwin 16 January [1877]
- From W. E. Darwin [15 January 1877]
- From Lawson Tait 16 January 1877
- To Wilhelm Rimpau 16 January 1877
- To Gardeners’ Chronicle 17 January [1877]
- To W. T. Thiselton-Dyer 17 January 1877
- To J. V. Carus 17 January 1877
- To Lawson Tait 17 January [1877]
- From A. R. Wallace 17 January 1877
- From J. D. Hooker 18 January 1877
- From Friedrich Hildebrand 18 January 1877
- To Thomas Belt 18 January 1877
- From Arthur Rawson 19 January 1877
- From Thomas Belt 20 January 1877
- From J. V. Carus 20 January 1877
- To W. H. Leggett 22 January 1877
- To J. V. Carus 22 January 1877
- From George Paul 22 January 1877
- To Asa Gray 23 January 1877
- From J. J. Murphy 23 January 1877
- To G. J. Romanes 24 June [1881]
- To J. D. Hooker 25 January [1877]
- From Hermann Müller 25 January 1877
- From A. W. Malm 26 January 1877
- From J. D. Hooker 27 January 1877
- From G. J. Allman 27 January 1877
- To J. D. Hooker 28 January 1877
- To Pietro Siciliani 28 January 1877
- From J. B. Saint-Lager 30 January 1877
- From C. C. Graham 30 January 1877
- To F. H. Hooker 31 January [1868]
- To G. S. Ffinden 31 January 1877
- From Karl Beger [12 February 1877]
- From Thomas Palmer February 1877
- From Emil Rade [before 16] February 1877
- To Milan Radovanović [before 12 February 1878]
- To J. W. Judd [after 1 February 1877]
- To H. W. Bates 6 February [1877]
- From Asa Gray 6 February 1877
- From A. A. van Bemmelen and H. J. Veth 6 February 1877
- From R. T. Clarke 6 February [1878]
- To J. B. Innes 7 February [1876]
- From D. T. Fish 7 February 1877
- To H. N. Moseley 7 February 1877
- From Ernst Haeckel 9 February 1877
- To T. M. Reade 9 February 1877
- From Asa Gray 10 February 1877
- From Hugo Schneider 10 February 1877
- To Francis Galton 11 February [1877]
- To J. M. F. Ludlow 11 February 1876
- To A. A. van Bemmelen 12 February 1877
- From Berliner Gesellschaft für Anthropologie, Ethnologie und Urgeschichte 12 February 1877
- To Alpheus Hyatt 13 February 1877
- To Karl von Scherzer 13 February 1877
- From Lawson Tait 14 February 1877
- To Ferdinand von Hochstetter 14 February 1877
- To Richard Kippist 15 February 1877
- From C.-F. Reinwald 15 February 1877
- To Ernst Haeckel 16 February 1877
- To W. T. Thiselton-Dyer 16 February 1877
- To Emil Rade 16 February 1877
- To August Weismann 17 February 1877
- To Asa Gray 18 February [1877]
- To J. V. Carus 19 February 1877
- To Édouard Heckel 19 February 1877
- To Down Friendly Society 19 February 1877
- To Gardeners’ Chronicle 19 February [1877]
- From Franz von Rekowsky 20 February 1877
- To Arnold Dodel-Port 20 February 1877
- From John Gibbs 20 February 1877
- From C.-F. Reinwald 21 February 1877
- From Francis Galton 22 February 1877
- From John Gibbs 22 February 1877
- From Hunter Nicholson 23 February 1877
- From Otto Zacharias 23 February 1877
- To Otto Zacharias [24 February 1877]
- From John Scott 24 February 1877
- To Miss Jacobson 25 February 1877
- To J. B. Innes 25 February [1877]
- To Albert Günther 25 February [1877]
- From Lawson Tait 25 February 1877
- From Alfred Grugeon 25 February [1877]
- From J. V. Carus 26 February 1877
- From O. Dill 26 February 1877
- To ? 26 February 1877
- From John Colby 27 February 1877
- To Oswald Heer 28 February 1877
- From J. D. Hooker [2 March 1877]
- To [John Colby] 2 March [1877]
- To J. D. Hooker 3 March [1877]
- To Albert Günther 3 March 1877
- To G. B. Ercolani 3 March 1877
- To J. V. Carus 4 March 1877
- To Édouard Heckel 4 March 1877
- From C. F. Claus 5 March 1877
- From Asa Gray 6 March 1877
- From James Torbitt to the House of Commons 6 March 1877
- To Smith, Elder & Co. 7 March 1877
- To Asa Gray 8 March 1877
- To Melchior Neumayr 9 March 1877
- To C. F. Claus 9 March 1877
- To C. H. Blackley 9 March 1877
- From J. G. F. Riedel 10 March 1877
- To Daniel Oliver 10 March 1877
- From Ernst Krause 11 March 1877
- From Leonard Blomefield 12 March 1877
- From Daniel Oliver 12 March 1877
- To John Andrews [before 12 March 1877]
- To Leonard Blomefield 13 March 1877
- To Daniel Oliver 13 March 1877
- From Karl von Estorff 15 March 1877
- From R. D. Fitzgerald 15 March 1877
- From C. C. Babington 16 March 1877
- To C. E. Norton 16 March 1877
- From R. F. Cooke 16 March 1877
- To W. W. Baxter 18 March [1882]
- From J. D. Hooker 19 March 1877
- To Pieter Harting 19 March 1877
- From Friedrich Hildebrand 19 March 1877
- To Asa Gray 19 March [1877]
- To Richard Kippist 19 March 1877
- From R. F. Cooke 19 March 1877
- From G. J. Wilson 19 March 1877
- From J. C. Morton 19 March 1877
- To J. D. Hooker 20 March [1877]
- From Charles Layton 20 March 1877
- To Enrique Godínez 21 March 1877
- From J. V. Carus 22 March 1877
- To Agricultural Gazette 22 March 1877
- From Fritz Müller 25 March 1877
- To Ernst Krause 25 March 1877
- To G. H. K. Thwaites 26 March 1877
- To J. V. Carus 26 March 1877
- From William Saville-Kent 26 March 1877
- To W. R. S. Ralston 27 March 1877
- To William Saville-Kent 28 March [1877]
- From Asa Gray 30 March 1877
- To ? 30 March 1877
- To Leonard Darwin 31 March 1877
- From Edward Harris April 1877
- From Hermann Müller 2 April 1877
- To Josef Kořenský 2 April 1877
- From W. E. Darwin [25 March? 1877]
- From W. D. Fox 3 April [1877]
- From W. E. Darwin 4 April 1877
- From John Colby 9 April 1877
- From Johannes Schön 10 April 1877
- To R. F. Cooke 11 April 1877
- From R. F. Cooke 12 April 1877
- From John Scott 12 April 1877
- From G. N. de Stoppelaar 14 April 1877
- To G. J. Romanes 15 April [1878]
- From H. N. Ridley 15 April 1877
- To H. N. Ridley 16 April [1877]
- To G. N. de Stoppelaar 17 April 1877
- To G. H. Lewes 18 April 1877
- From G. H. Darwin 19 April 1877
- From Thomas Howie 20 April 1877
- To J. D. Hooker 21 April [1877]
- From Otto Zacharias 21 April 1877
- To G. H. Darwin [23 April 1877]
- To E. S. Morse 23 April 1877
- From Robert McLachlan 23 April 1877
- To W. C. Marshall 20 [April 1877]
- From J. W. Judd 24 April 1877
- From Francis Darwin to G. N. de Stoppelaar 25 April 1877
- To Otto Zacharias 26 April 1877
- From C. G. Semper 26 April 1877
- To G. C. Robertson 27 April 1877
- From Thomas Meehan 28 April [1878]
- To G. O. Sars 29 April 1877
- To C. G. Semper 30 April 1877
- To Vasile Conta 29 April 1877
- To G. H. Darwin [3 June 1877]
- From C. W. Thomson 1 May 1877
- To [Francis Lloyd] 1 May [1877]
- To W. H. Flower 2 May [1877]
- From W. H. Flower 3 May 1877
- To C. W. Thomson 3 May 1877
- To Albert Günther 4 May [1877]
- To Albert Günther 7 May 1877
- To George King 7 May 1877
- From A. G. Butler 8 May 1877
- To Fritz Müller 9 May 1877
- From C.-F. Reinwald 9 May 1877
- From George Rolleston 9 May 1877
- To A. G. Butler 9 May 1877
- From G. H. Darwin [before 28 May 1877]
- From D. B. Miller 12 May 1877
- To Fritz Müller 14 May 1877
- To Karl von Scherzer 14 May [1877]
- From W. H. Flower to Otto Zacharias 17 May 1877
- From W. B. Bowles 17 May 1877
- To John Price 17 May 1877
- From W. B. Bowles 18 May 1877
- From E. S. Morse 18 May 1877
- To W. H. Flower 19 May [1877]
- From E. H. von Baumhauer 19 May 1877
- To C. V. Riley 19 May 1877
- To G. C. Robertson 22 May 1877
- From Asa Gray 22 May 1877
- To E. H. von Baumhauer 22 May 1877
- To G. J. Romanes 23 May 1877
- From J. H. Balfour to John Scott 24 May 1877
- To C. H. Drinkwater 24 May 1877
- To J. D. Hooker 25 May [1877]
- To G. J. Romanes 27–8 May [1877]
- From G. H. Darwin 28 May 1877
- To D. B. Miller 28 May 1877
- From J. D. Hooker 29 May 1877
- To G. H. Darwin 30 May [1877]
- From J. D. Hooker 31 May 1877
- To J. D. Hooker 31 May 1877
- From G.J. Romanes [June 1877]
- From J. M. Rodwell 1 June 1877
- From P. L. Sclater 2 June 1877
- To J. M. Rodwell 3 June 1877
- To Asa Gray 4 June [1877]
- To G. J. Romanes 5 June 1877
- From Charles Bradlaugh 5 June 1877
- To [Henry Huntsman?] 5 June [1877]
- To [Charles Roberts?] 6 June 1877
- From G. J. Romanes 6 June 1877
- From D. T. Fish 6 June 1877
- To Charles Bradlaugh 6 June 1877
- To ? 7 June 1877
- From Francis Darwin to G. J. Romanes 7 June 1877
- From C. F. Martins 7 June 1877
- To Edward Atkinson, Vice-Chancellor Cambridge University 8 June [1877]
- To L. H. Morgan 9 June 1877
- To Edward Atkinson 9 June 1877
- From Asa Gray 10 June 1877
- From Francis Darwin 11 June 1877
- To Francis Darwin [10 June 1877]
- To G. J. Romanes 11 June [1877]
- From J. V. Carus 13 June 1877
- From ? 13 June 1877
- From Lawson Tait 13 June [1877]
- From Frederic Harrison to G. H. Darwin 13 June [1877]
- From J. D. Hooker 14 June 1877
- To Lawson Tait 15 June [1877]
- From Frederic Harrison to G. H. Darwin 15 June [1877]
- To J. D. Hooker 16 June [1877]
- From J. D. Hooker 16 June 1877
- From G. J. Romanes 16 June [1877]
- To J. V. Carus 17 June [1877]
- From J. D. Hooker 18 June 1877
- From C. H. Blackley 18 June 1877
- To G. H. Darwin 18 [October 1877]
- From Horace Darwin 19 June 1877
- From Emile Alglave 21 June 1877
- To G. C. Robertson 22 June [1877]
- From Clipson Wray 22 June 1877
- To G. C. Robertson 24 June [1877]
- To ? 24 June [1877]
- From Francis Darwin to P. P. C. Hoek [c. 24 June 1877]
- From J. D. Hooker 25 June 1877
- From P. P. C. Hoek to C. W. Thomson 25 June 1877
- To ? 26 June [1877]
- From G. G. Bianconi 26 June 1877
- From Alfred Martinelli 26 June 1877
- To Otto Busch 26 June 1877
- From L. H. Morgan 26 June 1877
- From Frederic Harrison to G. H. Darwin 27 June [1877]
- From C. E. Bessey 28 June 1877
- From R. F. Cooke 29 June 1877
- To Ernst Krause 30 June 1877
- To R. F. Cooke 30 June [1877]
- From William Roberts 30 June 1877
- From C. W. Thomson 30 June 1877
- To Alfred Espinas [before 1 July 1877]
- From Thomas Meehan 1 July 1877
- To Williams & Norgate [November 1874 – May 1880]
- From Oscar Comettant 1 July 1877
- From Alfred Espinas 1 July 1877
- From R. F. Cooke 2 July 1877
- From Arnold Dodel-Port 3 July 1877
- To W. T. Thiselton-Dyer 4 July [1879?]
- From Max Schlesinger 4 July 1877
- From Hermann Hoffmann 4 July 1877
- To Thomas Meehan 5 July [1877]
- To Constantin James 5 July 1877
- From John Brigg 6 July 1877
- From William Preyer 6 July 1877
- To Arnold Dodel-Port 6 July 1877
- From C. L. Bernays 7 July 1877
- From Armand de Quatrefages 8 July 1873
- To William Preyer 8 July 1877
- To W. T. Thiselton-Dyer 9 July [1877]
- To L. H. Morgan 9 July [1877]
- From Ernst Krause 9 July 1877
- From George Bentham 10 July 1877
- To Ernst Krause 11 July [1877]
- From Daniel Oliver 12 July 1877
- To George Bentham 12 July 1877
- From C. G. Semper 13 July 1877
- From George Bentham [after 12 July 1877]
- To G. C. Robertson 13 July [1877]
- To W. T. Thiselton-Dyer 14 July [1877]
- From Ernst Krause 14 July 1877
- To Rudolph Ludwig [16 July 1877]
- From W. T. Thiselton-Dyer 16 July 1877
- To J. M. F. Ludlow 16 July [1877]
- To J. M. F. Ludlow 17 July [1877]
- To W. T. Thiselton-Dyer 18 July [1877]
- From W. T. Thiselton-Dyer 18 July 1877
- To C. G. Semper 18 July 1877
- To Pieter Harting 18 July [1875–81]
- From Adam Fitch 20 July 1877
- To J. M. F. Ludlow 20 July [1877]
- To the National Debt Office [after 29 July 1877]
- To W. T. Thiselton-Dyer 22 July [1877]
- To H. H. M. Herbert 20 July 1877
- From A. R. Wallace 23 July 1877
- From W. G. Smith 24 July 1877
- From J. F. McLennan 24 July 1877
- From R. I. Lynch 25 July 1877
- From W. T. Thiselton-Dyer 25 July 1877
- To W. T. Thiselton-Dyer 26 [July 1877]
- To F. J. Cohn 26 July 1877
- From A. H. Sayce 27 July 1877
- From W. G. Smith 27 July 1877
- To W. T. Thiselton-Dyer 28 July [1877]
- To A. H. Sayce 28 July 1877
- To Bartholomäus von Carneri 28 July 1877
- From Oswald Heer 29 July 1877
- To Thomas Druitt 29 July [1877]
- From A. H. Sayce 30 July 1877
- To James Torbitt 30 July 1877
- From J. F. McLennan 30 July 1877
- To T. H. Farrer 31 July [1877]
- From Alphonse de Candolle 31 July 1877
- To W. T. Thiselton-Dyer [before 24 August 1877]
- To W. T. Thiselton-Dyer [20–4 August 1877]
- To Friedrich Ludwig 1 August 1877
- To W. D. Whitney 1 August [1877]
- From D. Appleton & Co. [1 August – 15 September 1877]
- From A. H. Sayce 2 August 1877
- From Theodor von Heldreich 2 August 1877
- To Alphonse de Candolle 3 August 1877
- From F. J. Cohn 5 August 1877
- To W. T. Thiselton-Dyer 7 August 1877
- To F. J. Cohn 8 August 1877
- To Ludwig Noiré 8 August 1877
- To G. J. Romanes 9 August [1877]
- To James Croll 9 August 1877
- To Theodor von Heldreich 9 August 1877
- To G. J. Romanes 10 August [1877]
- From W. T. Thiselton-Dyer 10 August 1877
- From F. J. Cohn [10?] August 1877
- To W. T. Thiselton-Dyer 11 August 1877
- From G. J. Romanes 11 August 1877
- From E. W. Black 13 August 1877
- From G. J. Romanes 13 August 1877
- From Alphonse de Candolle 14 August 1877
- From R. F. Cooke 15 August 1877
- To Nature 15 August [1877]
- To W. H. Leggett 19 August 1877
- From William Ogle 21 August 1877
- To R. I. Lynch 23 August [1877]
- From W. T. Thiselton-Dyer 25 August 1877
- From T. H. Farrer 26 August 1877
- To Giovanni Canestrini 26 August [1877]
- To T. H. Farrer 27 August [1877]
- From Herman Semmig 27 August 1877
- From R. I. Lynch [28 August 1877]
- From R. I. Lynch [before 28 July 1877]
- From R. I. Lynch [before 28 July 1877]
- From G. H. K. Thwaites 28 August 1877
- From Frederick Schwerzfeger 29 August 1877
- To A. R. Wallace 31 August 1877
- To W. T. Thiselton-Dyer 31 August [1877]
- From E. A. Darwin 31 August [1877]
- From Roland Trimen 2 September 1877
- From A. R. Wallace 3 September 1877
- From Thomas Churton 3 September 1877
- To A. R. Wallace 5 September [1877]
- To W. T. Thiselton-Dyer 5 September [1877]
- From T. H. Farrer 5 September 1877
- To R. D. Fitzgerald 6 September 1877
- From J. W. Clark 8 September 1877
- From W. M. Moorsom 10 September 1877
- From F. E. Nipher 10 September 1877
- To W. M. Moorsom 11 September [1877]
- From Raphael Meldola 13 September 1877
- From J. V. Carus 13 September 1877
- From W. M. Moorsom 13 September [1877]
- From Horatio Piggot 13 September 1877
- To R. I. Lynch 14 September 1877
- To Raphael Meldola 14 September 1877
- To W. T. Thiselton-Dyer 15 September [1877]
- From L. A. Errera 15 September 1877
- To J. V. Carus 16 September [1877]
- To L. A. Errera 18 September 1877
- From Wilhelm Breitenbach 19 September 1877
- From M. C. Stanley 19 September 1877
- From W. E. Darwin to Emma and/or Charles Darwin c. 20–5 September 1877
- From Raphael Meldola 21 September 1877
- To Raphael Meldola 22 September [1877]
- To W. T. Thiselton-Dyer 22 September 1877
- From T. H. Farrer 23 September 1877
- To T. H. Farrer 24 September [1877]
- From Samuel Butler to Francis Darwin 24 September 1877
- To W. C. Marshall 27 September [1878]
- To Raphael Meldola 27 September [1877]
- From Asa Gray 27 September 1877
- To W. T. Thiselton-Dyer 27 September [1877]
- To C. W. von Nägeli 27 September 1877
- From W. W. Bailey 28 September 1877
- To Sara Sedgwick 29 September [1877]
- From Sara Sedgwick [30 September 1877]
- From L. A. Errera 30 September 1877
- From Sociedade de Geographia de Lisboa 30 September 1877
- From W. T. Thiselton-Dyer [21 October 1877]
- From W. W. Bailey [November 1877]
- To W. E. Gladstone 2 October 1877
- From T. H. Farrer 2 October 1877
- To W. E. Darwin 3 October [1877]
- To L. A. Errera 4 October 1877
- To H. E. Litchfield 4 October [1877]
- To J. B. Innes 5 October 1877
- From W. E. Darwin 5 October [1877]
- From R. F. Cooke 5 October 1877
- To W. T. Thiselton-Dyer 7 October 1877
- To Hjalmar Linnström 7 October 1877
- From Alphonse de Candolle 8 October 1877
- From J. D. Caton 8 October 1877
- From C. T. E. von Siebold 10 October 1877
- To Alphonse de Candolle 10 October 1877
- To [W. W. Bailey] 10 October 1877
- From L. A. Errera 10 October 1877
- To W. T. Thiselton-Dyer 11 October [1877]
- To Gaston de Saporta 11 October 1877
- To T. M. Reade 12 October [1877]
- From R. F. Cooke 12 October 1877
- From Robert Damon 12 October 1877
- From C.-F. Reinwald 13 October 1877
- To C. T. E. von Siebold 15 October 1877
- To Robert Damon 15 October 1877
- From A. R. Smith 16 October 1877
- From R. F. Cooke 17 October 1877
- From G. O. Wight 18 October 1877
- To Raphael Meldola 19 October [1877]
- From J. D. Hooker 19 October 1877
- From Fritz Müller 19 October 1877
- From Raphael Meldola 20 October 1877
- To John Tyndall 20 October 1877
- From J. B. Innes 20 October 1877
- To J. D. Hooker 21 October [1877]
- To W. C. Williamson 22 October [1877]
- To Raphael Meldola 22 October [1877]
- To [Agnes Taylor?] 22 October [1877]
- To R. I. Lynch 23 October [1877]
- From G. H. Darwin 23 October 1877
- From W. C. Williamson 23 October 1877
- From W. E. Gladstone 23 October 1877
- From E. M. Holmes 23 October 1877
- From T. F. Cheeseman 23 October 1877
- From W. E. Darwin 24 October 1877
- To W. E. Darwin 24 October [1877]
- To W. C. Williamson 24 October [1877]
- To W. E. Gladstone 25 October [1877]
- To C. E. Norton 25 October 1877
- From William Saville-Kent 25 October 1877
- From Edward Atkinson 25 October 1877
- From W. E. Darwin to Emma Darwin 26 October [1877]
- To J. D. Hooker [26 October 1877]
- To Edward Atkinson 27 October 1877
- DCP-LETT-11212
- From W. E. Darwin 27 October [1876]
- From G. H. Darwin [28 October 1877]
- From W. M. Moorsom 28 October 1877
- From J. P. Chesney 28 October 1877
- To G. H. Darwin [after 28 October 1877]
- From Francis Darwin to W. M. Moorsom 29 October 1877
- To Raphael Meldola 31 October [1877]
- To Emil Ertl [31 October 1877]
- To James Cartmell [November 1877]
- From George Henslow [c. 20 February 1878]
- From J. D. Hooker [c. 20 February 1878]
- To Horace Darwin 1 November [1877]
- From G. M. Asher to John Murray 1 November 1877
- From E. A. Darwin 2 November [1877?]
- From ‘Bronsomerulay’ Frazier [2 November 1877]
- To ‘Bronsomerulay’ Frazier [2 November 1877]
- To J. D. Hooker 6 November [1877]
- From A. D. Austin 6 November 1877
- From J. D. Hooker 7 November 1877
- From G. M. Asher 7 November 1877
- To J. D. Hooker 8 November [1877]
- From G. M. Asher 11 November 1877
- From J. T. Riches 12 November 1877
- From R. A. Vance 12 November 1877
- To J. W. Clark 12 November 1877
- To Fritz Müller 13 November 1877
- From J. D. Hooker 13 November 1877
- To Lawson Tait 13 November [1877]
- From J. G. Joyce 15 November 1877
- From J. G. Joyce 15–18 November 1877
- From John Sandys 17 November 1877
- To Hyacinth Hooker [18 November 1877]
- From Henry Jackson to Francis Darwin 18 November 1877
- To T. H. Huxley 19 November [1877]
- From E. W. Black 20 November 1877
- To Édouard Heckel 20 November 1877
- From Charles Hoare 20 November 1877
- From T. H. Huxley 21 November 1877
- To Nature 21 November [1877]
- To G. H. Darwin 21 November [1877]
- From G. H. Darwin 22 November 1877
- From William Saunders 22 November 1877
- From G. H. Darwin [23 November 1877]
- To Gustave Dewalque 23 November 1877
- From R. F. Cooke 23 November 1877
- To G. H. Darwin 24 November [1877]
- To R. F. Cooke 24 November 1877
- To J. D. Hooker 25 November [1877]
- From Samuel Butler to Francis Darwin 25 November 1877
- From John Murray 27 November [1877]
- From Fritz Müller [27 November 1877]
- From Leonard Darwin 28 November 1877
- To J. D. Hooker 28 November [1877]
- To John Murray 28 November 1877
- From John Murray 29 November [1877]
- From R. F. Cooke 29 November 1877
- From W. E. Darwin 30 November [1876]
- From W. D. Fox 29 November [1877]
- To John Murray 30 November 1877
- From R. W. Griffiths December 1877
- From R. F. Cooke 1 December 1877
- To G. J. Romanes [1 and 2 December 1877]
- To W. D. Fox 2 December 1877
- From George Bentham 2 December [1856]
- To Jacob Moleschott [2 December 1877]
- From Sara Sedgwick Darwin [3 December 1877]
- From Emma Darwin to T. H. Farrer [16 October 1877]
- To R. A. Vance 4 December 1877
- From Charles and Francis Darwin to G. J. Romanes 5 December 1877
- From T. A. Edison 7 December 1877
- To [William Baxter or W. W. Baxter?] 8 December [1842–81]
- From John Michels 9 December 1877
- From A. W. Rimpau 10 December 1877
- To W. W. Bailey 10 December [1877]
- To E. H. Sieveking 11 December 1877
- To R. F. Cooke 11 December [1877]
- To C. H. Merriam [11 December 1877]
- From Francis Darwin to T. F. Cheeseman 12 December 1877
- From R. F. Cooke 13 December 1877
- From M. T. Masters [13 December 1877]
- From E. A. Greaves 14 December 1877
- From Gaston de Saporta 16 December 1877
- From J. C. Conybeare 17 December 1877
- From G. J. Romanes 2 December 1877
- To A. W. Rimpau 13 December [1877]
- To Axel Key 20 December 1877
- From A. W. Malm 21 December 1877
- From J. V. Carus 23 December 1877
- To Gaston de Saporta 24 December 1877
- From B. J. Sulivan 25 December 1877
- To J. V. Carus 26 December [1877]
- To R. A. Blair 27 December 1877
- To W. C. Marshall 27 December 1877
- From Hyde Clarke 27 December 1877
- To Albert Gaudry 28 December 1877
- To M. T. Masters [6–12 December 1877]
- To Hyde Clarke [29 December 1877]
- From H. E. Stanley to James Torbitt 29 December 1877
- From Lawson Tait 31 December [1877]
- From F. J. Cohn 31 December 1877
- From E. A. Greaves to Francis Darwin 31 December 1877
- To the Down Friendly Society 31 December [1877?]
- To J. D. Hooker [29 December 1880]
- From W. T. Thiselton-Dyer [after 16 October 1875?]
- To Francis Darwin [1878?]
- From Francis Darwin [28 October 1877?]
- To Francis Darwin 5 [June 1878]
- From Ellen Harrison to Emma Darwin [January 1878]
- To Raphael Meldola 1 January [1878]
- To Édouard Heckel 1 January 1878
- To H. D. Garrison [1878]
- To Hermann Müller 1 January [1878]
- From Raphael Meldola 2 January [1878]
- To ? 2 January 1878
- To Raphael Meldola 3 January 1878
- From E. A. Greaves 3 January 1878
- To F. J. Cohn 3 January 1878
- To Frances Mosley Wedgwood 5 March [1860 or later]
- From William Farrer 4 January 1878
- To Karl von Scherzer? 4 January 1878
- From Hyde Clarke 5 January 1878
- From Francis Darwin to Thomas Edison [20–9 December 1877]
- To [William Baxter or W. W. Baxter?] [1842–82?]
- To W. W. Baxter 6 January [1878]
- From W. W. Baxter 7 January 1878
- From Leonard Darwin 7 January 1878
- From Leonard Darwin 8 January 1878
- To Raphael Meldola 11 January [1878]
- To Fritz Müller 12 January 1878
- From E. L. Sturtevant 12 January 1878
- To Adolf Ernst 16 January 1878
- From Eugenio Montero Ríos and Jacinto Mesía 16 January 1878
- To J. D. Hooker 17 [January 1878]
- From J. D. Hooker 18 January 1878
- From Arthur Nicols 18 January 1878
- From W. T. Thiselton Dyer 18 January 1878
- From W. C. Williamson 19 January 1878
- From Hugh Dalziel 19 January 1878
- To G. J. Romanes [20 January 1878?]
- To W. K. Parker 20 January [1878]
- To Asa Gray 21 [and 22] January 1878
- To William Preyer 25 January 1878
- From Raphael Meldola 26 January 1878
- From E. A. Darwin 27 January [1877]
- From W. E. Hart 27 January 1878
- From Theodor von Heldreich 8 February 1878
- From G. H. Darwin 28 January 1878
- From John Evans 28 January 1878
- To Hermanus Hartogh Heijs van Zouteveen 28 January [1873]
- From J. B. Thayer 29 January 1878
- From W. T. Thiselton-Dyer 29 January 1878
- To John Evans 29 January 1878
- To W. T. Thiselton-Dyer 31 January [1878]
- To Gaston de Saporta 31 January 1878
- From Carl Kraus [31?] January 1878
- From Asa Gray 3 February 1878
- To W. T. Thiselton-Dyer 3 February [1878]
- To G. H. Darwin 3 February [1878]
- From E. A. Darwin 4 February 1878
- To Gaston de Saporta 4 February [1878]
- From Ernst Haeckel 9 February 1878
- To Martin Beckhard 10 February [1878]
- To John Price 10 February [1878]
- From Carl Kraus 10 February 1878
- From W. E. Darwin 10 February [1880]
- To Raphael Meldola 12 February [1878]
- To Ernst Haeckel 12 February [1878]
- From W. D. Fox 12 February [1878]
- From J. D. Hooker 14 February 1878
- From G. M. Asher 14 February 1878
- To W. D. Fox 14 February 1878
- From James Houston 14 February 1878
- To J. B. Thayer 14 February 1878
- To J. D. Hooker 15 February 1878
- From G. M. Asher 16 February 1878
- To W. T. Thiselton-Dyer 16 February [1878]
- From Gaston de Saporta 16 February 1878
- To M. N. Galkin-Vraskoi 16 February 1878
- To Asa Gray 17 February [1878]
- From T. M. Reade 18 February 1878
- From Richard Randolph 19 and 20 February 1878
- To W. T. Thiselton-Dyer 19 and 21 February [1878]
- From Fritz Müller 20 February 1878
- To T. M. Reade 20 February [1878]
- From A. S. Wilson 21 February 1878
- To William Bowman 22 February 1878
- To George Francis 22 February 1878
- To A. S. Wilson 23 February 1878
- From James Torbitt 24 February 1878
- From John Simon 25 February 1878
- To W. H. Flower 25 February 1878
- From R. F. Cooke 26 February 1878
- To W. H. Flower 26 February [1878]
- To James Torbitt 26 February 1878
- From S. B. J. Skertchly 27 February 1878
- To J. D. Hooker 28 [February 1878]
- From A. S. Wilson 28 February 1878
- From James Torbitt 28 February 1878
- To James Torbitt [28 February 1878]
- From T. H. Farrer 28 February 1878
- From R. I. Lynch [September 1877 or later]
- From Fritz Müller 31 May 1881
- To J. D. Hooker [1 March 1878]
- To James Torbitt 1 March 1878
- To T. H. Farrer [28 February 1878]
- To T. H. Farrer 2 March 1878
- To J. D. Hooker [3 or 4 March 1878]
- From J. D. Hooker 2 March 1878
- To Sara Darwin [1 March 1878]
- From John Michels 2 March 1878
- To S. B. J. Skertchly 2 March 1878
- From James Caird to T. H. Farrer 2 March 1878
- From S. B. J. Skertchly 4 March 1878
- From James Caird 4 March 1878
- To T. H. Farrer [4 March 1878]
- To W. H. Flower [4 March 1878]
- To James Torbitt 4 March 1878
- From Francis Darwin to A. S. Wilson 4 March 1878
- To T. H. Farrer [after 2 March 1878]
- To A. S. Wilson 6 March 1878
- From James Torbitt 6 March 1878
- From James Grant 6 March 1878
- To G. J. Romanes 7 March 1878
- To T. H. Farrer 7 March 1878
- To T. H. Farrer 7 March 1878
- From Anton Schobloch 9 March 1878
- From T. H. Farrer 9 March 1878
- From T. H. Farrer 9 March 1878
- From Anton Stecker 9 March 1878
- To T. H. Farrer 11 March 1878
- To J. D. Hooker 11 March [1878]
- To James Torbitt 11 March [1878]
- From E. J. A. Bristow to H. E. Litchfield 11 March 1878
- From R. I. Lynch [before 14 September 1877]
- To James Grant 11 March 1878
- From J. D. Hooker 12 March 1878
- From Anton Stecker to Francis Darwin 12 March 1878
- To Frederick Smith 12 March 1878
- To Anton Stecker 13 March 1878
- From Grant Allen 13 March [1878]
- To T. H. Farrer 13 March 1878
- From Frederick Smith 14 March 1878
- From A. S. Wilson 14 March 1878
- From James Torbitt 14 March 1878
- To W. T. Thiselton-Dyer 14 March 1878
- From James Torbitt 15 March 1878
- From James Torbitt 15 March 1878
- To A. S. Wilson 16 March [1878]
- From James Grant 16 March 1878
- From S. B. J. Skertchly 17 March 1878
- From Francis Darwin to Anton Stecker 17 March 1878
- From James Torbitt 17 March 1878
- From J. D. Hooker 18 March 1878
- From Grant Allen 19 March [1878]
- From W. M. Hacon 19 March 1878
- To James Torbitt 20 March 1878
- From T. H. Farrer 20 March 1878
- To James Torbitt 21 March [1878]
- From James Caird 21 March 1878
- From Raphael Meldola 22 March 1878
- From Franklin Society, Union Christian College 23 March 1878
- To Raphael Meldola 24 March [1878]
- From James Torbitt 24 March 1878
- From James Torbitt 24 March 1878
- To Sophy Wedgwood 24 March [1878–80]
- To J. D. Hooker 25 March [1878]
- From [R. I. Lynch] 25 March 1878
- From J. I. Rogers to Francis Darwin 25 March 1878
- From Alfred Moschkau 26 March 1878
- To T. H. Farrer 26 March [1878]
- To Fritz Müller 27 March 1878
- To Raphael Meldola 27 March [1878]
- From W. M. Hacon 27 March 1878
- To Wallis Nash 27 March 1878
- To Alfred Moschkau 28 March 1878
- To J. D. Hooker 28 March [1878]
- From J. I. Rogers to Francis Darwin 29 March 1878
- From T. H. Farrer 29 March 1878
- To G. F. Yeo 29 March [1878]
- From J. W. Howell 31 March 1878
- To T. H. Farrer 31 March 1878
- To James Torbitt 31 March 1878
- From B. J. Sulivan [14–20] April [1878]
- To Karl von Scherzer 1 April 1878
- To John Price 2 April [1878]
- From James Torbitt 3 April 1878
- From Fritz Müller 5 April 1878
- To W. T. Thiselton-Dyer 5 April 1878
- To T. M. Reade 8 April 1878
- To G. J. Romanes 9 April [1878]
- From T. T. Sherlock 9 April 1878
- To James Torbitt 10 April [1876]
- From G. J. Romanes 10 April 1878
- To W. H. Flower 11 April 1878
- From W. H. Flower 12 April 1878
- From G. E. Dobson 12 April 1878
- To G. E. Dobson 12 April 1878
- To W. H. Flower 13 April [1878]
- To R. A. Blair 14 April 1878
- From Henry Potonié 16 April 1878
- From George Rolleston 16 August 1878
- To Raphael Meldola 17 April 1878
- To Otto Zacharias 17 April [1878]
- To W. T. Thiselton-Dyer 19 [May 1878]
- To Henry Potonié 20 April 1878
- To B. J. Sulivan 22 April 1878
- From Federico Delpino 23 April 1878
- To A. S. Wilson 24 April 1878
- From Leonard Darwin 25 April 1878
- To Karl von Scherzer 26 April 1878
- To Thomas Whitelegge 28 April 1878
- From Edmund Mojsisovics von Mojsvár 28 April 1878
- To G. G. Stokes 28 April 1878
- To A. S. Wilson 29 April [1878]
- From Édouard van Beneden 29 April 1878
- To G. J. Romanes 14 September [1878]
- From Robert Thomson 1 May 1878
- To The Times 1 May 1878
- From Raphael Meldola 3 May 1878
- From T. H. Farrer 4 May 1878
- To T. H. Farrer 7 May [1878]
- To T. H. Farrer 8 May [1878]
- From A. F. Gray 8 May [1878]
- From G. H. Darwin [before 9 May 1878]
- To W. T. Thiselton-Dyer 9 May [1878]
- To G. H. Darwin 9 May [1878]
- From B. J. Sulivan 10 May 1878
- To G. J. Romanes 11 [May 1878]
- From W. T. Thiselton-Dyer 11 May 1878
- To Francis Darwin [11 May 1878]
- From Francis Darwin [12 May 1878]
- From C. B. Clarke 12 May 1878
- To G. J. Romanes 13 May [1878]
- To Thomas Meehan 13 May 1878
- To W. T. Thiselton-Dyer 14 May 1878
- From Naphtali Lewy 14 May 1878
- To Raphael Meldola 15 May [1878]
- To Francis Darwin 15 [July 1878]
- To Fritz Müller 16 May 1878
- From Charles Layton 16 May 1878
- From Thomas Whitelegge 16 May 1878
- To Thomas Whitelegge 17 May 1878
- To R. A. T. Gascoyne-Cecil [18 May 1878]
- To T. W. Higginson [18 May 1878]
- From Emma Darwin to T. W. Higginson 19 May [1878]
- To Raphael Meldola 20 May [1878]
- To W. T. Thiselton-Dyer 20 [May 1878]
- To W. J. Beal 21 May 1878
- To Nature [21? May 1878]
- To A. F. Gray 21 May [1878]
- From Thomas Whitelegge 21 May 1878
- To J. N. Lockyer 21 May [1878]
- From W. E. Darwin 22 May [1878]
- From Francis Darwin to T. W. Higginson [before 24 May 1878]
- From Raphael Meldola 23 May 1878
- To Robert Thomson 23 May 1878
- From Francis Galton 24 May 1878
- From William Martindale to Francis Darwin 24 May 1878
- From M. C. Stanley 24 May 1878
- To Raphael Meldola 25 May 1878
- From Thomas Whitelegge 27 May 1878
- From Blanche and Alice 27 May 1878
- From George Cupples 27 May 1878
- To Wallis Nash 29 May 1878
- To Friedrich Ludwig 29 May 1878
- From E. W. Fithian 30 May 1878
- To E. W. Fithian [31 May 1878]
- From Alice and Blanche 31 May 1878
- To Francis Darwin [13–26 May 1878]
- To Edmund Mojsisovics von Mojsvár 1 June 1878
- To W. T. Thiselton-Dyer 2 June 1878
- To Francis Darwin 3 June [1879]
- To F. J. Cohn 5 June 1878
- To W. H. Kesteven 5 June 1878
- From Edmund Mojsisovics von Mojsvár 6 June 1878
- From J. I. Rogers to Francis Darwin 6 June 1878
- From T. H. Huxley 8 June 1878
- From J. D. Hooker 9 June 1878
- From John Coghlan 9 June 1878
- To W. C. Marshall 9 June [1875–81]
- To T. H. Huxley 11 June [1878]
- To Raphael Meldola 12 June [1878]
- From Arnold Dodel-Port 12 June 1878
- From Raphael Meldola 13 June 1878
- From Francis Darwin [after 14 July 1878]
- To Arnold Dodel-Port 15 June 1878
- To G. J. Romanes 16 June [1878]
- To W. T. Thiselton-Dyer 18 June [1878]
- From G. J. Romanes 18 June 1878
- From Arnold Dodel-Port 18 June 1878
- To Francis Darwin 18 June [1878]
- To G. J. Romanes 19 June [1878]
- From G. J. Romanes 21 June 1878
- To Hyacinth Hooker 21 June [1878?]
- From C. W. Thomson 22 June 1878
- To W. T. Thiselton-Dyer 23 June [1878]
- To Francis Darwin [c. 23 June 1878]
- To W. T. Thiselton-Dyer 25 June [1878]
- From J. E. Taylor 25 June 1878
- To J. E. Taylor 26 June 1878
- From James Torbitt 26 June 1878
- From E. A. Greaves to G. H. Darwin 26 June 1878
- From J. W. Judd 26 June 1878
- To Francis Darwin 26 June [1878]
- From W. T. Thiselton-Dyer [27 June 1878]
- To J. W. Judd 27 June 1878
- From G. H. Darwin [30 June 1878]
- To James Torbitt 28 June 1878
- From Francis Darwin [29 June] 1878
- From W. H. Dallinger 29 June 1878
- To Francis Darwin 29 [June 1878]
- DCP-LETT-11577F
- From Francis Darwin [July 1878]
- To Francis Darwin [before 17 July 1878]
- To M. H. Truelove 1 July 1878
- To J. D. Hooker 1 July 1878
- From T. H. Huxley 2 July 1878
- From J. D. Hooker 2 July 1878
- To O. C. Marsh 2 July 1878
- From J. I. Rogers to Francis Darwin 2 July 1878
- To Francis Darwin 2 July [1878]
- To W. H. Dallinger 2 July 1878
- To J. D. Hooker 3 July [1878]
- To R. A. Blair 4 [August] 1878
- To ? 4 July [1877?]
- To [G.-G. Baillière?] 5 July 1878
- To O. C. Marsh 5 July [1878]
- From Hermann Müller 5 July 1878
- To Francis Darwin 6 [July 1878]
- From Francis Darwin [before 7 July 1878]
- To William Spottiswoode 7 July [1878]
- To Francis Darwin 7 [July 1878]
- From Francis Darwin [after 7 July 1878]
- To G. H. Darwin 10 [July 1878]
- From W. E. Darwin 10 July [1878]
- To W. D. Fox 10 July 1878
- From William Spottiswoode 10 July 1878
- From R. A. Blair to the Smithsonian Institution 10 July 1878
- From G. H. Darwin [before 11 July 1878]
- To G. H. Darwin 11 [July 1878]
- From G. H. Darwin 12 July 1878
- To G. H. Darwin 13 [July 1878]
- From Francis Darwin [12 July 1878]
- To W. T. Thiselton-Dyer 14 July [1878]
- To G. H. Darwin 14 [July 1878]
- To O. C. Marsh 14 July [1878]
- To Francis Darwin 14 July [1878]
- From Thomas Whitelegge 15 July 1878
- To F. G. Stokes 16 July [1878]
- To Thomas Whitelegge 16 July 1878
- From W. T. Thiselton-Dyer 16 July 1878
- From Francis Darwin [before 17 July 1878]
- From R. A. Blair 17 July 1878
- To Francis Darwin 17 July [1878]
- To W. T. Thiselton-Dyer 19 July [1878]
- To C. G. Semper 19 July 1878
- From Thomas Druitt 20 July 1878
- To Ann Marston 20 July [1879]
- To Francis Darwin 20 [July 1878]
- To Francis Darwin [20? July 1878]
- To Eugène Dupuy 21 July 1878
- From Francis Darwin [21 July 1878]
- From Fritz Müller 21 July 1878
- From C. G. Semper 22 July 1878
- From W. D. Fox 22 July [1878]
- To Fritz Müller 24 July 1878
- To Raphael Meldola 24 July [1878]
- From Francis Darwin 24 and 25 July 1878
- To C. G. Semper 24 July [1878]
- From A. D. Austin 25 July 1878
- To Francis Darwin 25 July [1878]
- From Francis Darwin [4–7 August 1878]
- From Franz Ritter von Kobell 25 July 1878
- From J. A. Allen 29 July 1878
- To Franz Ritter von Kobell 29 July 1878
- To Francis Darwin 30 July [1878]
- From J. D. Hooker 31 July 1878
- To W. T. Thiselton-Dyer 2 August [1878]
- From Francis Darwin [before 3 August 1878]
- To Francis Darwin 3 August [1878]
- To W. H. Flower 4 [August] 1878
- From J.-B. Dumas and Joseph Bertrand 5 August 1878
- From A. S. Wilson 6 August 1878
- From George Bentham 7 August 1878
- To Hugo de Vries [10 or 11 August 1878]
- To L. A. Errera 8 August [1878]
- To J. F. Fisher 8 August [1878]
- To Hugo de Vries 8 August [1878]
- To A. S. Wilson 9 August [1878]
- From Paul Broca 5 August 1878
- From Gaston de Saporta 9 August 1878
- To George Bentham 10 August [1878]
- From Alphonse de Candolle 10 August 1878
- To T. H. Huxley 11 August [1878]
- From L. A. Errera 12 August 1878
- To J.-B. Dumas and Joseph Bertrand 12 August [1878]
- From Hermenegildo Giner de los Ríos 12 August 1878
- To Édouard Heckel 13 August 1878
- To ? 13 August 1878
- From J. F. Fisher 13 August 1878
- From W. J. L. Wharton 14 August 1878
- To Francis Darwin 14 [August 1878]
- To Asa Gray 15 August 1878
- To Alphonse de Candolle 15 August 1878
- To Gaston de Saporta 15 August 1878
- From Kasimir Ledeganck and Jean Crocq 15 August 1878
- To Hugo de Vries [15] August [1878]
- To G. H. Darwin 17 [August 1878]
- From F. B. Goodacre 17 August 1878
- From Hugo de Vries 17 August 1878
- To William Ogle 17 August 1878
- From G. J. Romanes 17 August 1878
- To Francis Darwin [17 August 1878]
- To Francis Darwin [19 August 1878]
- To F. B. Goodacre 20 August [1878]
- To G. J. Romanes 20 August 1878
- From Francis Darwin to ? 23 August 1878
- From Richard Randolph 23 August 1878
- To F. B. Goodacre 23 August [1878]
- To E. Vignes 23 August 1878
- To W. T. Thiselton-Dyer 24 August [1878]
- To Octavius Pickard-Cambridge 26 August [1878]
- From A. L. Adams 29 August [1878]
- To Wilhelm Behrens 29 August [1878]
- From G. J. Romanes 29 August 1878
- To W. T. Thiselton-Dyer 30 August [1878]
- From Marinko Radovanović 30 August 1878
- To W. T. Thiselton-Dyer 31 August [1878]
- From Francis Darwin [after August 1878]
- To G. J. Romanes 2 September [1878]
- From F. B. Goodacre 2 September 1878
- To F. B. Goodacre 3 September [1878]
- From G. J. Romanes 10 September 1878
- From Édouard van Beneden 11 September 1878
- From James Torbitt 12 September 1878
- To Francis Darwin 12 September [1878]
- From Francis Darwin [12 September 1878]
- From C. E. Fry 13 September 1878
- To Francis Darwin 13 [September 1878]
- From A. R. Wallace 14 September 1878
- To B. J. Placzek 15 September 1878
- To A. R. Wallace 16 September 1878
- From James Torbitt 16 September 1878
- From W. C. Williamson 20 September 1878
- To Hermann Müller 20 September 1878
- To G. J. Romanes 21 September [1878]
- To W. C. Williamson 21 September [1878]
- From J. V. Carus 21 September 1878
- To Frederick Howlett 21 September [1878]
- From E. A. Floyer 22 September 1878
- From E. A. Floyer [after 22 September 1878?]
- To J. V. Carus 23 September 1878
- From A. R. Wallace 23 September 1878
- To G. D. Campbell 23 September 1878
- To F. B. White 23 September [1878]
- From E. B. Aveling 23 September 1878
- To E. B. Aveling [after 23 September 1878]
- From Hermann Müller 25 September 1878
- To ? 28 September 1878
- From Francis Darwin to Clarke Hawkshaw [before 18 April 1878]
- To G. J. Romanes 1 October [1878]
- To John Murray 1 October [1878]
- To J. D. Hooker 3 October [1878]
- From J. D. Hooker 4 October 1878
- To Eduard Strasburger 4 October 1878
- To J. D. Hooker 5 October [1878]
- From C. G. Semper 5 October 1878
- From W. H. Flower 6 [December] 1878
- From J. D. Hooker 7 October 1878
- To R. D. Fitzgerald 7 October 1878
- To Joseph Lister 7 October 1878
- From C.-F. Reinwald 8 October 1878
- From James Torbitt 8 October 1878
- From G. H. Darwin 10 October 1878
- From Wilhelm Behrens 11 October 1878
- From James Torbitt [after 18 October 1878]
- To Virginius Dabney 20 October 1878
- From R. M. Middleton 22 October 1878
- To W. T. Thiselton-Dyer 24 October [1878]
- To M. L. Pennington 24 October 1878
- From Eduard Strasburger 26 October 1878
- To G. H. Darwin 29 October [1878]
- From Raphael Meldola 30 October 1878
- To W. T. Thiselton-Dyer 30 October [1878]
- To Raphael Meldola 31 October [1878]
- From Raphael Meldola 1 November 1878
- To G. H. Darwin 2 November [1878]
- From B. J. Sulivan 3 November 1878
- To A. C. Ramsay 3 November 1878
- To B. J. Sulivan 5 November [1878]
- From Albert Gaudry 6 November 1878
- From G. H. Darwin 7 November 1878
- From B. J. Sulivan 7 November 1878
- From Emil du Bois-Reymond 7 November 1878
- To G. H. Darwin 8 November [1878]
- From J. A. Harker 11 November 1878
- To Emil du Bois-Reymond 12 November 1878
- From Edouard Bergson 12 November 1878
- To John Lubbock 12 November [1881]
- From G. A. Gaskell 13 November 1878
- To Benjamin Disraeli [15–18 November 1878]
- To G. A. Gaskell 15 November 1878
- From M. D. Conway 18 November 1878
- From A. B. Farn 18 November 1878
- To Raphael Meldola 19 November [1878]
- To M. D. Conway 19 November 1878
- From T. H. Noyes 19 November 1878
- To G. J. Romanes 20 [November 1878]
- To W. K. Parker? 20 November [1878]
- From G. A. Gaskell 20 November 1878
- To W. T. Thiselton-Dyer 21 November [1878]
- To Francis Darwin [21 November 1878]
- From Francis Darwin [before 22 November 1878]
- From Francis Darwin [after 28 February 1878]
- To Francis Darwin [22 November 1878]
- To Edward Frankland 22 November [1878]
- From Francis Darwin [23 November 1878]
- DCP-LETT-11756
- To Raphael Meldola 25 November [1878]
- From Raphael Meldola 25 November 1878
- To Raphael Meldola 26 November [1878]
- To C. G. Semper 26 November [1878]
- From H. N. Moseley 24 November 1878
- To H. N. Moseley 26 November [1878]
- To J. B. Innes 27 November [1878]
- From R. F. Cooke 27 November 1878
- From H. N. Ridley [before 28 November 1878]
- To H. N. Ridley 28 November 1878
- From Laureano Figuerola Ballester 28 November 1878
- To C. G. Semper 30 November 1878
- From J. B. Innes 1 December 1878
- To Edward Frankland 2 December [1878]
- To William Ogle [after 27 November 1878]
- To John Power 3 December 1878
- From Francis Darwin [25–7 November 1878]
- To R. I. Lynch 4 December [1878]
- To the syndics of Cambridge Botanic Garden 4 December 1878
- To John Tyndall 4 December [1878]
- To James Torbitt [1]4 December 1878
- To G. J. Romanes 5 December [1878]
- From John Tyndall 5 December 1878
- From F. S. Arnold [2]6 December 1878
- From C. G. Semper 6 December 1878
- To C. G. Semper [after 6 December 1878]
- From Anthony Rich 7 December 1878
- From G. J. Romanes [8] December 1878
- To R. A. Blair 9 December 1878
- To Anthony Rich 9 December 1878
- To W. H. Flower 9 December 1878
- To G.S. Ffinden 9 December 1878
- From Anthony Rich 10 December 1878
- To G. J. Romanes 11 December [1878]
- From Raphael Meldola 11 December 1878
- To W. E. Darwin 12 December [1878]
- From James Torbitt 12 December 1878
- To Anthony Rich 12 December 1878
- To E. A. Darwin 12 December 1878
- From E. A. Darwin 13 December [1878]
- From W. E. Darwin 13 [December 1878]
- From J. D. Cooper 13 December 1878
- To J. D. Cooper [after 13 December 1878]
- To Raphael Meldola 14 December [1878]
- To J. D. Hooker 14 December [1878]
- From J. D. Hooker 14 December 1878
- From G. H. Darwin 14 December 1878
- To William Ogle 16 December [1878]
- To J. D. Hooker 17 December [1878]
- From W. D. Fox 19 December [1856]
- From W. M. Hacon 20 December 1878
- From Gabriel Max 21 December 1878
- To John Tyndall 22 December [1878]
- To Gaston de Saporta 22 December 1878
- From W. M. Hacon 24 December 1878
- From Anthony Rich 25 December 1878
- To G. J. Romanes 27 December [1878]
- From W. M. Hacon 28 December 1878
- From T. H. Huxley 28 December 1878
- To T. H. Huxley 29 December 1878
- From Anthony Rich 29 December 1878
- From W. T. Thiselton-Dyer 30 December 1878
- To W. R. Greg 31 December 1878
- To F. S. Arnold 31 December [1878]
- From James Torbitt [1879?]
- To Francis Darwin [4 February – 8 March 1879]
- To Francis Darwin? [1879–80?]
- To Albert Günther 1 January 1879
- From B. J. Sulivan 2 January [1880]
- From Marius Koch 3 January 1879
- To A. S. Wilson 4 [June] 1879
- To Edward Frankland 4 January [1879]
- From Mary Jung 7 January 1879
- From Carl Kraus 8 January 1879
- To ? 9 January 1879
- From W. E. Darwin 9 January 1879
- To W. E. Darwin 10 January [1879]
- From Leopold Würtenberger 10 January 1879
- To Mary Jung 11 January 1879
- From C. H. Blackley 13 January 1879
- To C. H. Blackley 14 January 1879
- To Karl Höchberg 13 January 1879
- To John Fiske 14 June [1879]
- To Melchior Neumayr 15 January 1879
- To Leopold Würtenberger 15 January 1879
- From Gaston de Saporta 16 January 1879
- From W. K. Parker 17 January 1879
- From Karl Höchberg 17 January 1879
- To G. J. Romanes [18 January 1879]
- To T. H. Huxley 18 January 1879
- To Gaston de Saporta 19 January 1879
- To Raphael Meldola 20 January 1879
- To H. N. Moseley 20 January 1879
- From Melchior Neumayr 21 January 1879
- From Fritz Müller 21 January 1879
- From H. N. Moseley 21 January 1879
- To ? 23 January [1879?]
- To Emil du Bois-Reymond 23 January 1879
- From W. S. Dallas 23 January 1879
- To H. N. Moseley 23 and 30 January 1879
- To Melchior Neumayr 24 January 1879
- To W. T. Thiselton-Dyer 25 January [1879]
- From H. W. Bates 25 January 1879
- From W. T. Thiselton-Dyer 27 January 1879
- To H. W. Bates 26 January 1879
- From A. F. Batalin 29 January 1879
- From Leopold Würtenberger 29 January 1879
- To Edmund Mojsisovics von Mojsvár 29 January 1879
- To W. B. Cheadle 31 January 1879
- From C. F. Austin February 1879
- From Karl Beger [c. 12 February 1879]
- From D. Appleton & Co. 1 February 1879
- From Henry Potonié 1 February 1879
- To W. T. Thiselton-Dyer 3 February 1879
- To H. N. Moseley 4 February 1879
- From Thomas Maston 5 February 1879
- From H. N. Moseley 5 February 1879
- From Raphael Meldola 6 February 1879
- To Raphael Meldola 7 February 1879
- From Leopold Würtenberger 7 February 1879
- From George Henslow 8 February 1879
- To Edward Frankland 8 February 1879
- From Ernst Haeckel 9 February 1879
- From Karl Alberts 9 February 1879
- To Karl Alberts [after 9 February 1879]
- From Ernst Krause 10 February 1879
- To Anton de Bary 11 February 1879
- To George Henslow 11 February 1879
- To Ernst Krause 12 February 1879
- To H. W. Bates 12 February 1879
- To Ernst Haeckel 12 February 1879
- From Grant Allen 12 February 1879
- From the Naples Zoological Station 12 February 1879
- To N. N. Christophe 12 February 1879
- To J. A. Crawley 12 February 1879
- To Hermann Müller 12 February [1879]
- To Arnold Dodel-Port 12 February 1879
- From Hermann Müller 12 February 1879
- From the masters of Greiz College 12 February 1879
- From Arthur Mellersh 13 February 1879
- To Hugo de Vries 13 February 1879
- To John Tyndall 14 February 1879
- From Hermann Müller 14 February 1879
- To Francis Darwin [before 25 February 1879]
- From Francis Darwin [c. 25 February 1879]
- To Friedrich Ludwig 16 February 1879
- From C. A. Lindvall 16 February 1879
- To John Tyndall 17 February [1879]
- From W. B. Cheadle 17 February 1879
- To Carlos Ribeiro 17 February 1879
- From A. G. Butler 19 February 1879
- To A. G. Butler 20 February [1879]
- From Anton de Bary 20 February 1879
- To Grant Allen [before 21 February 1879]
- To R. B. Sharpe 21 February [1879]
- To the British Museum 21 February 1879
- From Grant Allen 21 February [1879]
- To W. T. Thiselton-Dyer 21 February [1879]
- To the Darwin children 21 February 1879
- From W. E. Darwin 25 February [1879]
- From Karl Höchberg 21 February 1879
- From C. W. Hamilton 21 February 1879
- To Francis Darwin 21 February [1879]
- From Hugo de Vries 24 February 1879
- From Anton Stecker 24 February 1879
- To Karl Höchberg 25 February 1879
- To W. T. Thiselton-Dyer 25 [February 1879]
- To C. A. Lindvall 25 February 1879
- To S. J. Pozzi 26 February 1879
- From E. P. Wright 26 February 1879
- To E. K. Blyth 26 February [1879]
- From A. S. Wilson 27 February 1879
- From Frederick King 27 February 1879
- To E. P. Wright 28 February [1879]
- To the curators of patronage, Edinburgh University 28 February 1879
- From A. F. Batalin 28 February 1879
- To Francis Galton [1 March 1879?]
- To John Tyndall 3 March [1878]
- From W. D. Fox 3 March [1879]
- From Francis Darwin 3 March [1879]
- From G. H. Darwin 3 March 1879
- To Fritz Müller 4 March 1879
- To J. N. Lockyer 4 and 6 March [1879]
- From A. R. Leeds 4 March 1879
- To L. A. Errera 5 March 1879
- To A. S. Wilson 5 March 1879
- From E. A. Darwin 8 March [1879]
- From E. A. Darwin [8 March 1879?]
- To Ernst Krause 9 March 1879
- To W. T. Thiselton-Dyer 10 March [1879]
- From C. H. Browning 10 March 1879
- From E. A. Darwin 11 March [1879]
- To G. S. Ffinden 11 March 1879
- From Ernst Krause 12 March 1879
- From Alexander Dick-Cunyngham 12 March 1879
- To W. S. Dallas 12 March [1879]
- To Robert McLachlan 12 March [1879]
- To L. A. Errera 13 March 1879
- To W. T. Thiselton-Dyer 13 March 1879
- From Robert McLachlan 13 March 1879
- From E. A. Darwin 13 March [1879]
- To Ernst Krause 14 March 1879
- From Horace Darwin to F. M. Balfour 14 March 1879
- To B. W. Richardson 14 March 1879
- From W. S. Dallas 14 March 1879
- To W. E. Darwin 15 March [1871]
- From W. S. Dallas 15 March 1879
- From J. D. Hooker 13 March 1879
- To J. D. Hooker 16 March [1879]
- From W. B. Tegetmeier 17 March 1879
- From Francis Darwin to J. D. Hooker 17 March 1879
- From Ernst Krause 17 March 1879
- To Hendrik Weyenbergh 18 March 1879
- To Ernst Krause 19 March 1879
- To Nature [before 20 March 1879]
- To W. B. Tegetmeier 20 March 1879
- To Francis Galton 22 March 1879
- To Wilhelm Pfeffer 23 March 1879
- From Ernst Krause 24 March 1879
- To W. T. Thiselton-Dyer 24 March 1879
- To C. M. C. Darwin 24 March 1879
- From L. A. Errera 25 March 1879
- From Frederick King 25 March 1879
- From E. A. Wheler 25 March 1879
- From E. S. Galton 25 March 1879
- To C. S. Wedgwood 26 March 1879
- To E. A. Wheler 26 March 1879
- From C. M. C. Darwin 27 March 1879
- To Reginald Darwin 27 March 1879
- To Ernst Krause 27 March 1879
- From E. A. Wheler 28 March 1879
- From Reginald Darwin 29 March 1879
- To Friedrich Hildebrand 29 March 1879
- From Ernst Krause 30 March 1879
- From E. S. Galton 31 March 1879
- From A. G. Butler 31 March 1879
- To E. A. Wheler 31 March [1879]
- To W. T. Thiselton-Dyer 1 April [1879]
- From Alfred Newton 1 April 1879
- To Reginald Darwin 1 April 1879
- To Grant Allen 2 [May] 1879
- From Reginald Darwin 2 April 1879
- To Ernst Krause 2 April 1879
- To Alfred Newton 2 April [1879]
- To Elliott Coues [after 2 April 1879]
- From Nicolai Mengden 2 April 1879
- To E. S. Galton 2 April [1879]
- To W. T. Thiselton-Dyer 3 April [1879]
- From Henry Reeks 3 April 1879
- From Raphael Meldola 4 April 1879
- From V. H. Darwin 4 April 1879
- To Reginald Darwin 4 April 1879
- To Ernst Krause 5 [May] 1879
- From H. G. Zeuthen 5 April 1879
- To C. M. C. Darwin 6 April 1879
- From Henry Reeks 7 April 1879
- From Reginald Darwin 7 April 1879
- From Emma Darwin to Nicolai Mengden 8 April 1879
- To Reginald Darwin 8 April 1879
- From Reginald Darwin 9 April 1879
- To H. G. Zeuthen 9 April 1879
- From V. H. Darwin 9 April 1879
- To Reginald Darwin 10 April [1879]
- From Reginald Darwin 18 April 1879
- From V. H. Darwin 12 April [1879]
- From B. W. Richardson 12 April 1879
- To E. A. Wheler 12 April 1879
- From V. H. Darwin 13 April [1879]
- To Fanny Kellogg 13 April 1879
- DCP-LETT-11993
- From C. M. C. Darwin 14 April 1879
- From W. D. Fox to G. H. Darwin 15 April [1879]
- To C. M. C. Darwin 15 April 1879
- From C. M. C. Darwin 16 April [1879]
- To Reginald Darwin 16 April 1879
- From C.-F. Reinwald 17 April 1879
- From Wilhelm Breitenbach 17 April 1879
- From E. A. Wheler 17 April 1879
- From Raphael Meldola 18 April 1879
- From E. A. Wheler 18 April 1879
- To T. H. Huxley 19 April 1879
- To G. H. Darwin 19 April [1879]
- To E. A. Wheler 19 April 1879
- From C. M. C. Darwin 21 April [1879]
- From W. D. Fox to G. H. Darwin 21 April [1879]
- To ? 21 April 1879
- To W. E. Darwin 22 April [1879]
- From Wilhelm Pfeffer 22 April 1879
- To W. T. Thiselton-Dyer 22 April [1879]
- From W. T. Thiselton-Dyer 22 April 1879
- To T. L. Brunton 25 April 1879
- From Leslie Stephen to [Leonard Darwin] 25 April 1879
- To T. L. Brunton 25 April 1879
- DCP-LETT-12013F
- From T. L. Brunton 26 April [1879]
- To T. L. Brunton 28 April 1879
- From Richard Okes to G. H. Darwin 29 April 1879
- To Ernst Haeckel 29 April 1879
- From W. E. Darwin 29 April [1879]
- To Francis Galton 30 April [1879]
- From Anthony Rich 30 April [1879]
- From James Torbitt 30 April 1879
- To James Torbitt [after 30 April 1879]
- To [G. H. Darwin] [12 July 1879?]
- From James Torbitt 1 May 1879
- To Ernst Krause 2 May 1879
- To Reginald Darwin 2 May 1879
- From G. H. Darwin [before 3 May 1879]
- To James Torbitt 3 May 1879
- To G. H. Darwin 3 May [1879]
- To E. A. Wheler 3 May 1879
- To C. S. Wedgwood [3 May 1879]
- From T. H. Farrer 4 May 1879
- From Ernst Krause 5 May 1879
- To G. H. Darwin 5 May [1879]
- From G. H. Darwin 5 May 1879
- From G. J. Goschen and Edward Enfield [before 6 May 1879]
- From Leonard Darwin 7 May 1879
- To G. H. Darwin 7 May [1879]
- From W. S. Dallas 7 May 1879
- From Ernst Krause 8 May 1879
- From W. S. Dallas 8 May 1879
- From John Fordyce 8 May 1879
- To John Fordyce 7 May 1879
- To Ernst Krause 9 May [1879]
- From H. A. Pitman 9 May 1879
- From Robert Tachau 9 May 1879
- From W. S. Dallas 9 May 1879
- From K. P. von Kaufman 9 May 1879
- To H. A. Pitman [13 May 1879]
- From G. H. Darwin 10 May 1879
- To G. H. Darwin [11 May 1879]
- To J. S. Burdon Sanderson 13 May 1879
- To Ernst Krause 13 May 1879
- To Ernst Krause 14 May 1879
- From J. S. Burdon Sanderson 14 May 1879
- From Ernst Krause 15 May 1879
- To G. H. Darwin 15 May [1879]
- From Charles Moore 15 May 1879
- From W. T. Winn 16 May 1879
- From C. Harris 20 May 1879
- From E. J. Collings 21 May 1879
- From W. M. Hacon 22 May 1879
- From Ernst Krause 23 May 1879
- To E. J. Collings 25 May [1879]
- To Grant Allen 26 May [1879]
- To Ernst Krause 27 May 1879
- From Albin Gaertner 27 May 1879
- From V. H. Darwin 28 May [1879]
- To G. G. Stokes 28 May 1879
- To Reginald Darwin 29 May [1879]
- From Francis Darwin 29 May 1879
- From Grant Allen 29 May 1879
- From V. H. Darwin 30 [May 1879]
- From Anthony Rich 30 May 1879
- To G. S. Ffinden 31 May 1879
- From Reginald Darwin 31 May 1879
- To G. H. Darwin 31 May [1879]
- From G. S. Ffinden 31 May 1879
- To Albin Gaertner 31 May 1879
- To Francis Darwin [before 29 May 1879]
- From Francis Darwin [after 2 June 1879]
- To Francis Darwin [2 June 1879 or earlier]
- To H. B. Wheatley 1 June 1879
- To Francis Darwin [1 August 1878]
- To John Murray 2 June 1879
- To Francis Darwin 2 June [1879]
- From Nicolai Mengden 3 June 1879
- From John Murray 3 June [1879]
- To G. S. Ffinden 4 June 1879
- To K. P. von Kaufman 4 June 1879
- From Raphael Meldola 4 June 1879
- From W. S. Dallas 4 June 1879
- To Francis Darwin [before 5 June 1879]
- From V. H. Darwin 5 June [1879]
- To W. T. Thiselton-Dyer 5 June 1879
- To Ernst Krause 5 June 1879
- To Nicolai Mengden 5 June 1879
- To ? 5 June 1879
- To Raphael Meldola 6 June [1879]
- To Francis Darwin 6 and 7 June [1879]
- From Ernst Krause 7 June 1879
- From Douglas Fox to W. de W. Abney 7 June 1879
- From Francis Galton 7 June 1879
- To Francis Galton 8 June [1879]
- To Ernst Krause 9 June [1879]
- From B. J. Sulivan 9 June 1879
- From Francis Galton 9 June 1879
- To John Fiske 10 June 1879
- From W. T. Thiselton-Dyer 10 June 1879
- To Francis Galton 10 June [1879]
- To B. J. Sulivan 10 June 1879
- From G. H. Darwin to Emma Darwin [30 April 1879]
- From F. B. White 11 June 1879
- To F. B. White [after 11 June 1879]
- From Ernst Krause 13 June 1879
- From Paul Aussant-Carà 13 June 1879
- From Hermann Otto 15 June 1879
- From Thomas Comber 15 June 1879
- To Francis Galton 15 [June 1879]
- From W. S. Dallas 16 June 1879
- To Francis Darwin 16 June [1879]
- From Francis Darwin [after 16 June 1879]
- To Ernst Krause 16 June [1879]
- To H. A. Pitman 17 June 1879
- From Raphael Meldola 18 June 1879
- To W. T. Thiselton-Dyer 18 June 1879
- To Raphael Meldola 19 [June 1879]
- To C. W. von Nägeli 21 June 1879
- From G. H. Darwin 24 June 1879
- To W. D. Crick 24 June [1879]
- To Francis Darwin 24 June [1879]
- DCP-LETT-12118
- To G. H. Darwin 25 June [1879]
- To L. M. Forster 25 June 1879
- To Francis Darwin [after 24 June 1879]
- To Francis Darwin 25 June [1879]
- From T. L. Brunton 26 June [1879]
- To Francis Darwin [26 June 1879]
- From T. H. Farrer to Horace Darwin [before 27 June 1879]
- To T. H. Farrer 27 June [1879]
- To T. L. Brunton 27 June 1879
- From Francis Darwin [before 26 June 1879]
- To James Paget 28 June [1879]
- To Francis Darwin 28 June [1879]
- From Francis Darwin to Emma Darwin 30 June 1879
- To W. T. Thiselton-Dyer [after 26] July [1879]
- From Anthony Rich 1 July 1879
- To H. W. Reichardt 1 July 1879
- To G. B. Hill 1 July [1879]
- From Francis Darwin [22 June 1878]
- To Francis Darwin 2 July [1879]
- To Francis Darwin 2 July [1879]
- From Francis Darwin 4 July 1879
- To Francis Darwin 4 July [1879]
- To G. H. Darwin 7 [July 1879]
- To Ernst Krause 7 July 1879
- To G. H. Darwin 8 [July 1879]
- From E. A. Darwin 8 July 1879
- To Reginald Darwin 8 July 1879
- To E. R. Lankester 9 July 1879
- To W. T. Thiselton-Dyer 9 July [1879]
- From Francis Darwin 9 July 1879
- From Ernst Krause 10 July 1879
- From C. C. Blake 10 July 1879
- From G. H. Darwin 10 July 1879
- From Reginald Darwin 11 July 1879
- From J. L. Chester 11 July 1879
- From Ernst Haeckel 12 July 1879
- To G. H. Darwin 12 July 1879
- To Ernst Krause 12 July [1879]
- To J. L. Chester 12 July 1879
- To Francis Darwin 12 July [1879]
- To Leonard Darwin 12 July [1879]
- From G. H. Darwin 13 July 1879
- To Anton Dohrn 13 July 1879
- To James Paget 14 July 1879
- From J. B. Innes 14 July 1879
- To E. H. O’Callaghan 14 July 1879
- To Ernst Haeckel 15 July 1879
- From Leonard Darwin [before 12 July] 1879
- From W. S. Dallas 15 July 1879
- From Ernst Krause 16 July 1879
- To J. V. Carus 17 July 1879
- To Ernst Krause 18 July [1879]
- From Felix Marchand 20 July 1879
- To Felix Marchand [c. 1 August 1879]
- To J. D. Hooker 22 July [1879]
- To G. J. Romanes 23 July 1879
- From Carl Hensgen 23 July 1879
- From W. E. Gladstone 24 July 1879
- From T. M. Coan 25 July 1879
- From James Paget 25 July 1879
- From J. D. Hooker 26 July 1879
- From Samuel Wilks 26 July 1879
- From Anthony Rich 27 July 1879
- To Samuel Wilks 27 July 1879
- From W. S. Dallas 29 July 1879
- From Francis Darwin [before 31 July 1879]
- From R. T. Wright 2 August 1879
- To Francis Darwin [2 August 1879]
- From Reginald Darwin 4 August 1879
- To W. E. Gladstone 4 August [1879]
- To Anton de Bary 5 August 1879
- To John Fiske 5 August [1879]
- From W. S. Dallas 6 August 1879
- From J. R. Atkin 7 August [1879]
- From Hugo de Vries 7 August 1879
- From Archibald Liversidge 7 August 1879
- From John Ball 8 August 1879
- From Anton de Bary 9 August 1879
- From F. B. Goodacre 11 August 1879
- To Hugo de Vries 12 August 1879
- To Leonard Darwin 12 August 1879
- To Ernst Krause 13 August 1879
- To F. B. Goodacre 13 August [1879]
- From Ernst Krause 16 August 1879
- From John Denny 16 August 1879
- To John Fiske 17 August [1879]
- From W. S. Dallas 18 August 1879
- To Ernst Krause 19 August [1879]
- To Victor Marshall 25 August 1879
- To A. A. W. Hubrecht 25 August 1879
- From E. S. Morse 26 August 1879
- From W. S. Dallas 28 August 1879
- From W. M. Hacon 28 August 1879
- To Gustaf Retzius 28 August 1879
- To F. B. Goodacre 29 August 1879
- From Ernst Haeckel 30 August 1879
- To G. H. Darwin [31 July 1879]
- From Victor Marshall [after 4 November 1879]
- From Ernst Krause 1 September 1879
- To W. T. Thiselton-Dyer 1 September [1879]
- From F. B. Goodacre 1 September 1879
- From Otto Hahn 1 September 1879
- To Ernst Haeckel 2 September 1879
- From Hugo de Vries 2 September 1879
- To F. B. Goodacre 2 September 1879
- To C.-F. Reinwald 2 September [1879]
- From Ernst Haeckel 3 September 1879
- To Ernst Krause 3 September [1879]
- From John Murray 3 September [1879]
- To John Murray 4 September 1879
- To Ernst Haeckel [4 September 1879]
- From R. F. Cooke 6 September 1879
- To Hugo de Vries 6 September 1879
- From Victor Marshall 7 September 1879
- From F. B. Goodacre 8 September 1879
- To R. F. Cooke 9 September 1879
- From Hugo de Vries 10 September 1879
- To F. B. Goodacre 10 September [1879]
- To C.-F. Reinwald 11 September 1879
- From R. F. Cooke 11 September 1879
- From Ernst Krause 12 September 1879
- From W. S. Dallas 13 September 1879
- To G. J. Romanes 14 September [1879]
- To Victor Marshall 14 September 1879
- To Ernst Krause 15 September 1879
- From W. S. Dallas 15 and 16 September 1879
- To Karl Alberts 16 September 1879
- From James Torbitt 18 September 1879
- From Melchior Neumayr 19 September 1879
- From W. S. Dallas 19 September 1879
- From Henry Johnson 22 September [1879]
- To Henry Johnson 24 September 1879
- To Thomas de Grey 26 September 1879
- From Henry Johnson 26 September [1879]
- From E. Desrousseaux 30 September 1879
- From G. H. Darwin [30 November 1879]
- To J. D. Hooker 1 October [1879]
- From J. D. Hooker 2 October 1879
- From Ernst Krause 2 October 1879
- To Harvard University Library? 2 October [1879]
- To C. G. Semper 2 October 1879
- To Gustaf Retzius 2 October 1879
- From Gustaf Retzius 3 October 1879
- To R. F. Cooke 4 October [1879]
- From W. P. Garrison 4 October 1879
- To W. P. Garrison [after 4 October 1879]
- From W. S. Dallas 5 October 1879
- To J. D. Hooker 5 October [1879]
- To Arnold Dodel-Port 6 October 1879
- From J. D. Hooker 7 October 1879
- To Karl Alberts 8 October 1879
- To Daniel Mackintosh 9 October 1879
- From T. H. Farrer 12 October 1879
- From Eduard Schulte 23 October 1879
- From B. J. Sulivan 13 October 1879
- From W. M. Hacon 13 October 1879
- To T. H. Farrer 13 October 1879
- From Daniel Mackintosh 14 October 1879
- To B. J. Sulivan 15 October 1879
- To Daniel Mackintosh 16 October 1879
- From Emily Beke 16 October 1879
- To W. P. Garrison 16 October 1879
- To J. D. Hooker 17 October [1879]
- From George Sim 18 October 1879
- From W. S. Dallas 18 October 1879
- From Ernst Krause 20 October 1879
- To E. S. Morse 21 October 1879
- To Casimir de Candolle 21 October 1879
- To John Lubbock 22 October 1879
- To George Sim 22 October 1879
- To T. H. Farrer 23 October 1879
- To ? 23 October 1879
- To Horace Darwin 23 October [1879]
- From Francis Darwin to Ernst Krause 23 October 1879
- To Asa Gray 24 October 1879
- From R. F. Cooke 25 October 1879
- From Ernst Krause to Francis Darwin 26 October 1879
- From G. M. Asher 26 October 1879
- To G. M. Asher 28 October 1879
- To Eduard Schulte 28 October 1879
- To W. T. Thiselton-Dyer 29 October 1879
- From Francis Darwin to Ernst Krause [29 October 1879]
- To C.-F. Reinwald 29 October 1879
- From A. S. Packard 30 October 1879
- From Eduard Schulte 30 October 1879
- From T. H. Farrer 30 October 1879
- To T. H. Farrer 31 October 1879
- From W. T. Thiselton-Dyer 31 October 1879
- To George Sleigh [before 26 September 1879]
- From J. S. Burdon Sanderson [11 November 1879]
- To E. A. Wheler [before 12 November 1879]
- To Julius von Haast 1 November 1879
- DCP-LETT-12285
- To James Torbitt 1 November 1879
- From T. H. Farrer 2 November 1879
- To T. H. Farrer 3 November 1879
- To Victor Marshall 4 November [1879]
- To J. D. Hooker 4 November [1879]
- To Ernst Krause 4 November 1879
- From James Torbitt 4 November 1879
- From W. B. Cooper 4 November 1879
- From W. M. Hacon 4 November 1879
- From Ernst Krause 6 November 1879
- From Asa Gray 6 November 1879
- From Francis Darwin [6 July 1879]
- To James Torbitt 7 November 1879
- From Anthony Rich 7 November 1879
- From W. M. Hacon 7 November 1879
- From Wilhelm Behrens 8 November [1879]
- To W. M. Hacon 8 November [1879]
- From W. E. Darwin [9 November 1879]
- From W. P. Garrison 9 November 1879
- To August Weismann 10 November 1879
- To Ernst Krause 10 November 1879
- To Wilhelm Behrens 10 November 1879
- From R. A. Vance 10 November 1879
- From W. M. Hacon 10 November 1879
- To G. S. Ffinden 11 November 1879
- From A. E. Darwin 12 November [1879]
- From Reginald Darwin 12 November 1879
- From Douglas Fox 12 November 1879
- From Henry Maudsley 12 November 1879
- From Francis Galton 12 November 1879
- From E. S. Galton 12 November 1879
- From Emma Darwin to M. C. Stanley 12 November [1879]
- From Jan van Bolhuis [13 November 1879]
- From Ernst Krause 14 November 1879
- To Newman Marks 14 November [1879]
- To Francis Galton 14 November [1879]
- From Anthony Rich 14 November 1879
- From W. S. Dallas 14 November 1879
- From G. W. Norman 15 November 1879
- From Newman Marks 15 November 1879
- From James Torbitt 15 November 1879
- From Reginald Darwin 17 November 1879
- To Ernst Krause 17 November 1879
- To T. H. Farrer 17 November 1879
- To James Torbitt 17 November 1879
- To C. H. Tindal 17 November 1879
- To R. F. Cooke 18 November [1879]
- From James Paget 18 November 1879
- From Eduard Schulte 18 November 1879
- To W. T. Thiselton-Dyer 20 November 1879
- To E. S. Galton 20 November 1879
- From James Torbitt 20 November 1879
- To A. S. Packard 23 November 1879
- From Ernst Krause 24 November 1879
- From John Ball 28 November 1879
- From J. D. Hooker 29 November 1879
- From James Torbitt [after 19 November 1879]
- From E. S. Galton 19 November 1879
- To J. D. Hooker 1 December [1879]
- From E. R. Shaw 2 December 1879
- From A. A. W. Hubrecht 2 December 1879
- To E. R. Shaw 4 December 1879
- From E. L. Sturtevant 4 December 1879
- From Robert Christison 4 December 1879
- From T. L. Brunton 5 December 1879
- From A. H. Payne 5 December 1879
- To F. B. Goodacre 5 December 1879
- From F. B. Goodacre 8 December 1879
- From W. E. Darwin [8 December 1879]
- From J. W. Judd 9 December 1879
- From Emma Nixon 10 December 1879
- To A. H. Payne 10 December 1879
- From J. F. Moulton 10 December 1879
- From Raphael Meldola 11 December 1879
- To W. T. Thiselton-Dyer 11 December [1879]
- To H. E. Litchfield 11 [December 1879]
- To Raphael Meldola 12 December [1879]
- From A. G. Butler 13 December 1879
- From J. F. Moulton 13 December 1879
- To Asa Gray 16 December 1879
- From A. B. Buckley 16 December 1879
- To Nature 16 December 1879
- To J. D. Hooker 17 December 1879
- To A. B. Buckley 17 December 1879
- From J. D. Hooker 18 December 1879
- To J. D. Hooker 19 December [1879]
- From A. B. Buckley 19 December 1879
- To A. B. Buckley 19 December 1879
- From A. B. Buckley 20 December 1879
- From Adam Fitch 20 December 1879
- From R. W. Dixon 20 December 1879
- From Lewis Wright 22 December 1879
- From R. W. Dixon [after 20 December 1879]
- From R. A. Job 23 December 1879
- From James Torbitt 25 December 1879
- To Karl von Scherzer 26 December 1879
- From C. E. Ferguson 27 December 1879
- To James Torbitt 27 December 1879
- From Michele Lessona 28 December 1879
- From Anthony Rich 28 December 1879
- From Antonio Mendola 29 December 1879
- To C. H. Tindal 29 December 1879
- From Emil Witte 29 December 1879
- From Ercole Ricotti 29 December 1879
- To A. S. Wilson 30 December [1879]
- From W. M. Hacon 31 December 1879
- From E. A. Darwin [1870–81]
- From Francis Darwin [before 15 December 1880]
- From William Clowes & Sons [before 8 November 1880]
- From James Torbitt [18 March 1880]
- To G. J. Romanes [17 December 1881]
- To W. E. Darwin [before 16 September 1880]
- To Horace Darwin [28 June 1879]
- From Maria [1871–82]
- To Maria [1871–82]
- From Maria [1871–82]
- From O. A. Ainslie 2[5] November 188[0]
- From Mary Johnson [after 22 July 1878]
- From Victor Marshall [after 4 November 1879]
- To Williams & Norgate [before 4 September 1880]
- To Nature 15 December [1879]
- To Horace Darwin 1 January 1880
- From C. H. Tindal 1 January 1880
- From W. E. Darwin 1 January [1881]
- From Samuel Butler 2 January 1880
- From Joseph Prestwich 2 January 1880
- From T. H. Farrer 2 January [1881]
- To Samuel Butler 3 January 1880
- To Joseph Prestwich 3 January 1880
- From J.-H. Fabre 3 January 1880
- To B. J. Sulivan 3 January 1880
- To Ercole Ricotti 4 January 1880
- From Wallis Nash 4 January 1880
- To A. R. Wallace 5 January 1880
- To Adolf Ernst 5 January 1880
- To Ernst Krause 5 January 1880
- From A. S. Wilson 5 January 1880
- From W. E. Darwin 6 January [1880]
- To Vincent, Teja & Co 5 January 1880
- To C. H. Tindal 5 January 1880
- To J.-H. Fabre 6 January 1880
- To William Cole 6 January 1880
- To J. T. Murray 6 January 1880
- From Ernst Krause 7 January 1880
- To Antonio Mendola 8 January [1880]
- From F. B. Goodacre 7 January 1880
- To A. S. Wilson 8 January 1880
- To Hyacinth Hooker 8 January 1880
- From A. R. Wallace 9 January 1880
- From E. A. Wheler 10 January 1880
- To the Darwin children 10 January 1880
- To Horace Darwin 11 January [1880]
- From Asa Gray 12 January 1880
- From Lawrence Ruck 12 January [1881]
- From Lawson Tait 12 January 1880
- From Henry Johnson 12 January [1872?]
- To Alfred Krakauer 12 January 1880
- To Lawson Tait 13 January 1880
- From A. M. Marshall to F. M. Balfour 13 January 1880
- From J. I. Rogers 13 January 1880
- From W. C. Williamson 13 January 1880
- To Jabez Hogg 14 January 1880
- To W. T. Thiselton-Dyer 15 January 1880
- To Lawson Tait 15 January [1880]
- From Daniel Mackintosh 15 January 1880
- From Ernst Krause 16 January 1880
- From the Darwin children 17 January 1880
- To the Darwin children 17 [January 1880]
- From Lawson Tait 18 January [1880]
- To W. T. Thiselton-Dyer 18 January [1880]
- From Hermann Welcker 18 January 1880
- To Asa Gray 19 January 1880
- To Ernst Krause 19 January 1880
- From Charles Dixon 19 January 1880
- To Asa Gray 20 January [1880]
- To Ernst Haeckel 21 January 1880
- From Samuel Butler 21 January 1880
- To Athenæum 24 January 1880
- To W. T. Thiselton-Dyer 27 January [1880]
- From Grant Allen to G. J. Romanes 28 January 1880
- From W. E. Darwin [28 January 1880]
- To G. H. Darwin 29 January [1880]
- From Oskar von Giesl 29 January 1880
- From Samuel Butler to the Athenæum [before 31 January 1880]
- To Hermann Welcker 30 January 1880
- To J.-H. Fabre 31 January 1880
- From H. E. Litchfield [1 February 1880]
- To H. E. Litchfield 1 February [1880]
- To Wallis Nash 1 February 1880
- From Richard Litchfield 1 February 1880
- From R. B. Litchfield 1 February 1880
- To Athenæum 1 February 1880
- From H. E. Litchfield [1 February 1880]
- To T. H. Huxley 2 February 1880
- From W. Z. Seddon 2 February 1880
- To R. B. Litchfield 2 February 1880
- To G. J. Romanes 3 February 1880
- From Asa Gray 3 February 1880
- From R. B. Litchfield 3 February 1880
- From T. H. Huxley 3 February 1880
- To T. H. Huxley 4 February [1880]
- To Ernst Krause 4 February 1880
- To W. Z. Seddon 4 February 1880
- To G. J. Romanes 5 February 1880
- From W. S. Dallas 5 February 1880
- From Ernst Krause 6 February 1880
- From G. J. Romanes 6 February 1880
- To Ernst Krause [12 December 1880]
- From Ernst Krause 7 February 1880
- From Ernst Haeckel 9 February 1880
- To Ernst Krause 9 February 1880
- From Ernst Krause 10 February 1880
- From Wilhelm Breitenbach 10 February 1880
- From Anton Dohrn 11 February 1880
- From James Torbitt 12 February 1880
- From Lawson Tait [13 February 1880]
- To Hermann Müller 18 July 1880
- To Henry Woodward 13 February [1879]
- To Ernst Haeckel 12 February 1880
- To Lawson Tait 13 February 1880
- To Ernst Krause 13 February 1880
- To Wilhelm Breitenbach 13 February 1880
- To A. S. Wilson 13 February 1880
- To T. H. Farrer 14 February 1880
- From William Cole 14 February 1880
- To Lawson Tait 14 February 1880
- From George Bentham 15 February 1880
- To Anton Dohrn 15 February 1880
- From Ernst Krause 16 February 1880
- To George Bentham 16 February 1880
- From W. H. Flower to Francis Darwin 16 February 1880
- From S. B. J. Skertchly 16 February [1880]
- From Henry Faulds 16 February 1880
- To Asa Gray 17 February 1880
- From A. S. Wilson 17 February 1880
- To William Cole 17 February 1880
- To [Otago University] [16 February 1880]
- From J.-H. Fabre 18 February 1880
- To J.-H. Fabre 20 February 1880
- To A. S. Wilson 20 February 1880
- To G. H. Darwin 21 [February 1880]
- From Anton Dohrn 21 February 1880
- From J. D. Hooker 24 February [1881]
- To A. Gapitche 24 February 1880
- From E. A. Darwin [26? February 1880]
- To Anton Dohrn 27 February 1880
- From H. W. Crosskey 28 February 1880
- To H. W. Crosskey [4 March 1880]
- From Adolf Ernst 29 February 1880
- To W. H. Flower [after 16 February 1880]
- To J. L. Chester 2 March 1880
- From R. F. Cooke 3 March 1880
- From James Torbitt [3 March 1880]
- From Anton Dohrn 3 March 1880
- From J. L. Chester 3 March 1880
- From G. H. Darwin 4 March 1880
- To James Torbitt 4 March 1880
- To T. H. Farrer 5 March 1880
- To T. H. Huxley [5 March 1880?]
- To G. H. Darwin 5 March [1880]
- From J. W. P. Blomfield to John Lubbock 5 March 1880
- From James Torbitt 5 March 1880
- From James Torbitt 5 March 1880
- From G. H. Darwin 6 March 1880
- To Leopold Würtenberger 6 March 1880
- To James Torbitt 6 March 1880
- To James Torbitt 6 March [1880]
- From T. H. Farrer 6 March 1880
- To T. H. Farrer 7 [March 1880]
- From Anthony Rich 7 March 1880
- From James Caird to T. H. Farrer 8 March 1880
- From T. H. Farrer 8 March 1880
- From T. H. Farrer 8 March 1880
- To T. H. Farrer 9 March 1880
- To T. L. Brunton 10 March 1880
- To James Torbitt 10 March 1880
- To James Torbitt 11 March [1880]
- From Charles Layton 11 March 1880
- From Asa Gray 11 March 1880
- From T. H. Farrer 12 March 1880
- From James Torbitt 12 March 1880
- To James Torbitt 12 March [1880]
- From Arthur Nicols 15 March 1880
- To [William Whitaker?] 16 March 1880
- From Williams & Norgate 16 March 1880
- To James Torbitt 17 March [1880]
- From G. S. Ffinden 19 March 1880
- To ? 19 March 1880
- To James Torbitt 20 March 1880
- From Alfred Tylor 20 March 1880
- To Asa Gray 20 March [1880]
- From Ernst Krause 22 March 1880
- To Ernst Krause 23 March 1880
- From E. S. Morse 23 March 1880
- To Asa Gray 24 March [1880]
- To James Caird 24 March 1880
- To James Caird? [24 March 1880]
- To James Caird 24 March 1880
- From James Caird 25 March 1880
- From C. G. Gordon to W. E. Darwin 27 March 1880
- From C. C. Graham 28 March 1880
- To James Torbitt 28 March 1880
- From Volney Rattan to Asa Gray 29 March 1880
- To C. W. Fox 29 March 1880
- To James Torbitt 30 March 1880
- From Asa Gray [1 April 1880]
- From James Torbitt 1 April 1880
- From Jules Rouquette 2 April 1880
- From G. H. Schneider 2 April 1880
- From S. M. Herzfeld 2 April 1880
- To G. H. Schneider 3 April 1880
- To Adolf Ernst 4 April 1880
- From Asa Gray 4 April 1880
- From S. M. Herzfeld 4 April 1880
- To W. E. Darwin 5 [April 1880]
- To Henry Faulds 7 April 1880
- From W. E. Darwin 6 April [1880]
- To Francis Galton 7 April 1880
- From Valentine Ball 8 April 1880
- From Francis Galton 8 April 1880
- From Henry Woodward 8 April 1880
- From C. W. Fox 8 April 1880
- To E. S. Morse 9 [April] 1880
- To Nature 9 April [1880]
- To C. W. Fox 10 [April] 1880
- From Henry Woodward 10 April 1880
- To T. H. Huxley 11 [April] 1880
- To G. B. Ercolani 14 April 1880
- To W. T. Thiselton-Dyer 15 April 1880
- To F. E. Abbot 15 April 1880
- From William Tearle [before 16] April 1880
- To William Tearle 16 April 1880
- To [William Newton] 17 April 1880
- From C. C. Graham 17 April 1880
- To Asa Gray 19 April 1880
- From Ernst Krause 19 April 1880
- To Horace Darwin 20 April [1880]
- From John Fiske 20 April 1880
- To Edward Frankland 20 April 1880
- To Ernst Krause 21 April 1880
- From G. J. Romanes 22 April 1880
- To R. F. Cooke 23 April [1880]
- From Henry Pitman 24 April 1880
- From R. F. Cooke 27 April 1880
- To ? 27 April 1880
- From Hermann Müller 27 April 1880
- To J. V. Carus 28 April 1880
- To Williams & Norgate 28 April [1880]
- From Thomas Meehan 28 April 1880
- To H. D. Garrison 29 April 1880
- From Andrew Reid to W. G. Smith 28 April [1880]
- To H. N. Moseley 2 May 1880
- From H. N. Moseley 30 April 1880
- From Edward A. Reid to W. G. Smith 2 May 1880
- From Edward A. Reid to W. G. Smith [3 May 1880?]
- To T. H. Huxley [May 1880?]
- To Williams & Norgate 3 May [1880]
- To F. J. Hughes 5 May 1880
- To E. R. Lankester 6 May [1880]
- To T. H. Huxley [7 May] 1880
- From James Dixon 7 May 1880
- To James Dixon 8 May 1880
- From John Lubbock 9 May 1880
- To W. E. Darwin [9 May 1880]
- To James Torbitt 9 May 1880
- From T. H. Huxley 10 May 1880
- To T. H. Huxley 11 May 1880
- From James Torbitt 13 May 1880
- To John Fiske 14 May [1880]
- From F. E. Abbot 15 May 1880
- To B. J. Sulivan 16 May [1880]
- From J. Harris 16 May 1880
- To Giovanni Canestrini 17 May 1880
- From S. T. Preston 20 May 1880
- From E. A. Darwin 20 May [1880]
- From B. J. Sulivan 20 May 1880
- From William Spottiswoode 21 May 1880
- To J. Harris 21 May 1880
- To S. T. Preston 22 May 1880
- From William Spottiswoode 24 May 1880
- From Francis Darwin [25–7 May 1880]
- From G. H. Darwin 28 May 1880
- To Alphonse de Candolle 28 May 1880
- To G. H. Darwin 30 May [1880]
- [Williams & Norgate] 16 June [1880]
- From Anthony Rich 4 June 1880
- From J. H. Comstock 4 June 1880
- From James Torbitt 7 June 1880
- To H. B. Baildon 9 June 1880
- To W. E. Darwin 9 [June 1880]
- To John Murray 9 June 1880
- To Henry Johnson 9 June 1880
- From R. F. Charles 9 June 1880
- To G. H. Darwin 11 June [1880?]
- To John Murray 11 June 1880
- To Edward Vivian 11 June 1880
- To C. E. Ferguson 12 January 1880
- From R. F. Cooke 12 June 1880
- From R. F. Charles 12 June [1880]
- From W. E. Darwin to F. E. Abbot 13 June [1880]
- From Thomas Meehan 14 June 1880
- From James Torbitt 14 June 1880
- From C.-F. Reinwald 16 June 1880
- To James Torbitt 16 June 1880
- To A. C. Ramsay 17 June 1880
- From Ebenezer Turnbull 17 June 1880
- To W. E. Darwin 18 June 1880
- To W. C. McIntosh 18 June 1880
- To E. B. Tylor 19 June [1880]
- From E. B. Tylor 21 June 1880
- To E. H. Stanley 25 June 1880
- From W. E. Darwin 24 June [1880]
- From the Spallanzani Monument Committee 30 June 1880
- From G. H. Darwin [July 1880?]
- To Francis Darwin [before 1 August 1880]
- To Theodor von Heldreich 1 July 1880
- From Asa Gray 3 July 1880
- From Francis Galton 5 July 1880
- To W. E. Gladstone June 1880
- From E. A. Darwin 8 July [1880]
- From W. S. Dallas 8 July 1880
- To E. H. Stanley 8 July 1880
- To H. W. Jackson 9 [July 1880]
- To John Murray 10 July 1880
- To H. W. Jackson 15 July 1880
- From Lawson Tait 15 July [1880]
- From R. F. Cooke 15 July 1880
- From James Geikie 15 July 1880
- From C. L. van der Burg and H. Cretier 15 July 1880
- To C. L. van der Burg [after 15 July 1880]
- To R. F. Cooke 16 July 1880
- To Lawson Tait 16 July [1880]
- From E. W. Badger 17 July 1880
- To E. W. Badger [19 July 1880]
- To W. E. Darwin [19 July 1880]
- To Lawson Tait 19 July 1880
- To James Geikie 19 July 1880
- To the secretary of the Midland Union of Natural History Societies [before 20 July 1880]
- From R. F. Cooke 20 July 1880
- To R. F. Cooke 21 July 1880
- From W. E. Darwin to Charles and Emma Darwin 22 July 1880
- From James Geikie 22 July 1880
- From Ernst Krause 27 July 1880
- From G. H. Darwin 27 July 1880
- To G. H. Darwin 28 July [1880]
- From W. S. Dallas 28 July 1880
- From O. C. Marsh 28 July 1880
- To Francis Darwin 28 July [1880]
- To O. C. Marsh 31 August 1880
- To Ernst Krause 29 July 1880
- From Asa Gray 29 July [1880]
- To Ernst Krause 30 July 1880
- From Francis Darwin [1 August 1880]
- To ? 3 August 1880
- To J. M. F. Ludlow 4 August 1880
- From S. T. Preston 5 August 1880
- To Francis Darwin 5 August [1880]
- To R. P. Hardy 6 August [1880]
- To R. P. Hardy [after 11 August 1880]
- From Adolf Ernst 7 August 1880
- From S. T. Preston 8 August 1880
- To Eduard Strasburger 8 August 1880
- From W. C. Williamson 10 August 1880
- To R. P. Hardy 11 August [1880]
- To Francis Darwin 11 August [1880]
- From Hermann Müller 14 August 1880
- To J. W. Judd [15 August 1880]
- To A. B. Buckley 16 August [1880]
- From W. E. A. Axon 17 August 1880
- To H. H. Higgins 18 August [1880]
- From Ernst Krause 18 August 1880
- To W. C. Williamson 18 August [1880]
- From J. B. Innes 19 August 1880
- From W. E. Darwin 20 August 1880
- To T. M. Hughes 23 August 1880
- To J. B. Innes 23 August [1880]
- To G. H. Darwin 23 [August 1880]
- From J. B. Innes 24 August 1880
- From J. W. Judd 24 August 1880
- To J. W. Judd 25 August [1880]
- To T. M. Hughes 26 August 1880
- From H. W. Monk 27 August 1880
- From J. W. Judd 28 August 1880
- From R. F. Cooke 2 September 1880
- From W. C. Williamson to Emma Darwin 2 September 1880
- To F. M. Balfour 4 September 1880
- From Horace Darwin 4 September 1880
- To R. P. Hardy 7 September 1880
- From Horace Darwin 9 and 12 September 1880
- To W. E. Darwin 10 September [1880]
- To Adolf Ernst 11 September 1880
- From F. M. Balfour 13 September 1880
- To J. V. Carus 14 September 1880
- From B. D. Wrangham [before 16 September 1880]
- To Wilhelm Viëtor 16 September 1880
- From W. E. Darwin 16 September 1880
- To B. D. Wrangham 16 September 1880
- From D. Appleton & Co. 17 September 1880
- From J. V. Carus 18 September 1880
- From Horace Darwin to Emma Darwin [18 September 1880]
- To J. V. Carus 21 September 1880
- To Wilhelm Breitenbach 21 September 1880
- From T. M. Reade 21 September 1880
- To T. M. Reade 22 September 1880
- From Josiah Mason [before 22 September 1880]
- To Josiah Mason 22 September 1880
- From Édouard Heckel 23 September 1880
- From J. D. Hooker 24 September 1880
- From Charles Layton 24 September 1880
- From J. S. Keltie 24 September 1880
- To J. S. Keltie [after 24 September 1880]
- From James Torbitt 26 September 1880
- From George King 28 September 1880
- To George King 29 September 1880
- To James Torbitt 29 September 1880
- To T. H. Farrer 1 October 1880
- From the Council of the Otago Institute 1 October 1880
- From George King 1 October 1880
- To George King 2 October 1880
- From Frederick Parsons 3 October 1880
- From Ernst Krause 4 October 1880
- From W. S. Dallas 6 October 1880
- From T. H. Farrer 6 October 1880
- To Ernst Krause 7 October 1880
- From C.-F. Reinwald 7 October 1880
- From Horace Darwin 7 October 1880
- To T. H. Farrer 8 October 1880
- To H. E. Litchfield 8 [October 1880]
- To Sophy Wedgwood 8 October [1880]
- To G. H. Darwin [before 9 October 1880]
- From G. H. Darwin 9 October 1880
- From T. H. Farrer 9 October 1880
- To T. H. Farrer 10 October [1880]
- To Hyacinth Hooker 10 October [1880]
- From T. H. Farrer 10 October 1880
- To Romain Moniez 10 October 1880
- From A. R. Wallace 11 October 1880
- From James Caird 11 October 1880
- From E. B. Aveling 12 October 1880
- To T. H. Farrer 13 October 1880
- To T. H. Farrer 13 October [1880]
- To E. B. Aveling 13 October 1880
- From C.-F. Reinwald 14 October 1880
- To Baxter, Payne, and Lepper 14 October 1880
- From Sophy Wedgwood 15 October [1880]
- To R. F. Cooke 16 October 1880
- From T. H. Farrer 16 October 1880
- From G. E. Mengozzi 17 October 1880
- From Adolf Ernst 17 October 1880
- From R. F. Cooke 19 October 1880
- To T. H. Farrer 20 October 1880
- From Arthur de Souza Corrêa 20 October 1880
- To C.-F. Reinwald 20 October 1880
- To R. F. Cooke 20 October 1880
- To T. H. Thomas 22 October 1880
- To ? 23 October 1880
- From Arthur de Souza Corrêa 23 October 1880
- From S. T. Preston 24 October 1880
- From W. D. Roebuck to G. H. Darwin 25 October 1880
- To S. T. Preston 25 October 1880
- From S. T. Preston 26 October 1880
- From W. D. Roebuck to G. H. Darwin 26 October 1880
- From Anthony Rich 26 October 1880
- To G. E. Mengozzi [before 28] October 1880
- From G. E. Mengozzi 28 October 1880
- To James Torbitt 29 October 1880
- From Florence Dixie 29 October [1880]
- To Francis Galton 30 [October 1880]
- To James Murie 30 October 1880
- From Bartholomäus Carneri 30 October 1880
- To A. B. Buckley 31 October [1880]
- From F. M. Balfour [22 November 1880]
- To John Crier November 1880
- From W. D. Roebuck 1 November 1880
- From W. R. Browne [20–2] November [1881]
- To W. D. Roebuck [after 2 November 1880]
- To A. R. Wallace 3 November 1880
- To Volney Rattan 3 November 1880
- To W. D. Roebuck 3 November 1880
- From R. F. Cooke 4 November 1880
- From Florence Dixie 4 November [1880]
- To T. H. Huxley 5 November 1880
- To ? 5 November 1880
- From R. F. Cooke 5 November 1880
- From G. J. Romanes 5 November 1880
- To Nature 5 November [1880]
- From George Maw 6 November 1880
- From A. B. Buckley 7 November 1880
- From A. R. Wallace 8 November 1880
- To R. F. Cooke 8 November [1880]
- To George Maw 8 November 1880
- To A. B. Buckley 9 November 1880
- From R. F. Cooke 10 November 1880
- From Francis Darwin [11 or 12 November 1880]
- From Daniel Mackintosh 11 November 1880
- From B. J. Sulivan 12 November 1880
- From James Paget 12 November 1880
- From J. J. Eyre 12 November 1880
- To T. H. Huxley 13 November 1880
- To Daniel Mackintosh 13 November 1880
- From G. J. Romanes 13 November 1880
- To G. J. Romanes 14 November [1880]
- From T. H. Huxley 14 November 1880
- To Henry Johnson 14 November 1880
- From E. A. Darwin 14 November [1880]
- To A. B. Buckley 14 November 1880
- To James Paget 14 November 1880
- To G. J. Romanes 15 November 1880
- From R. F. Cooke 15 November 1880
- From A. R. Carrington 15 November 1880
- From B. J. Sulivan 16 November 1880
- To Williams & Norgate 16 November 1880
- From W. C. Williamson 17 November 1880
- To B. J. Sulivan 17 November 1880
- To W. C. Williamson 18 November 1880
- From G. J. Romanes 18 November 1880
- To Henry Johnson 18 November 1880
- From G. H. Darwin 19 November 1880
- From B. J. Placzek 19 November 1880
- To B. J. Placzek [after 19 November 1880]
- To G. H. Darwin 20 November [1880]
- From J. V. Carus 20 November 1880
- To R. F. Cooke 20 November 1880
- From Anthony Rich 20 November [1880]
- From S. H. Haliburton 21 November [1880]
- From A. R. Wallace 21 November 1880
- From Daniel Mackintosh 21 November 1880
- From V. O. Kovalevsky [after 21 November 1880]
- From J. D. Hooker 22 November 1880
- To S. H. Haliburton 22 November 1880
- To J. V. Carus 22 November 1880
- From W. E. Darwin 22 November [1880]
- To J. D. Hooker 23 November 1880
- From O. A. Ainslie 23 November 1880
- To W. T. Thiselton-Dyer 23 November [1880]
- To G. H. Darwin 23 November [1880]
- From Frederick McDermott 23 November 1880
- From Samuel Newington 23 November 1880
- From Alphonse de Candolle 23 November 1880
- To W. E. Darwin 23 [November 1880]
- From W. T. Thiselton-Dyer [after 23 November 1880]
- From Raphael Meldola 24 November 1880
- To Frederick McDermott 24 November 1880
- From G. E. Mengozzi 24 November 1880
- To G. E. Mengozzi [after 24 November 1880]
- To Raphael Meldola 25 November 1880
- To V. O. Kovalevsky 25 November [1880]
- From Wilhelm Pfeffer 25 November 1880
- From William Preyer 25 November 1880
- To Carlos Ribeiro 25 November 1880
- From M. T. Masters 25 November 1880
- To M. T. Masters [after 25 November 1880]
- From J. D. Hooker 26 November 1880
- From Francis Darwin to Édouard Heckel 26 November 1880
- From W. E. Darwin 26 November [1880]
- From R. F. Cooke 26 November 1880
- From Ernst Krause 26 November 1880
- To T. H. Huxley [after 26 November 1880]
- To G. H. Darwin [27 November 1880]
- To Hermann Müller 27 November 1880
- To William Preyer 27 November 1880
- From Hermann Müller 27 November 1880
- To James Geikie 27 November 1880
- To J. D. Hooker 28 November [1880]
- To Ernst Krause 28 November 1880
- To Walter White 28 November [1880]
- From O. A. Ainslie to Francis Darwin 28 November [1880]
- From J. D. Hooker 29 November 1880
- From J. B. Innes 29 November 1880
- To A. W. Howitt [before 30 November 1880]
- From Florence Dixie 29 November [1880]
- To W. E. Darwin 30 November [1880]
- From J. F. McLennan 30 November 1880
- From Hermann Müller 30 November 1880
- To J. W. C. Fegan [before 25 February 1880]
- To J. D. Hooker 1 December 1880
- From W. E. Darwin 1 December [1880]
- To J. B. Innes 2 December 1880
- To W. E. Darwin 2 December [1880]
- From William Preyer 2 December 1880
- From J. M. Herbert 28 December 1880
- From W. E. Darwin 3 December [1880]
- From James Paget 3 December 1880
- From J. D. Hooker 4 December 1880
- From Friedrich Hildebrand 4 December 1880
- From Ernst Krause 4 December 1880
- To J. D. Hooker 5 December 1880
- From Edouard Strasburger 5 December 1880
- From Federico Delpino 6 December 1880
- To T. H. Huxley [7 December 1880]
- From T. M. Reade 7 December 1880
- From T. H. Huxley 7 December 1880
- From Hermann Vöchting 8 December 1880
- From Hugo de Vries 8 December 1880
- From Arnold and Carolina Dodel-Port 8 December 1880
- To T. H. Huxley 9 December 1880
- From Ernst Krause 9 December 1880
- To T. M. Reade 9 December 1880
- To G. H. Darwin 9 December [1880]
- From T. M. Reade 10 December 1880
- From G. J. Romanes 10 December 1880
- From James Torbitt 11 December 1880
- From T. H. Huxley 11 December 1880
- From S. H. Haliburton 12 December [1880]
- To S. H. Haliburton 13 December 1880
- To G. J. Romanes 13 December 1880
- To James Geikie 13 December 1880
- To James Torbitt 13 December 1880
- To James Paget 13 December 1880
- To James Murie 14 December [1880]
- From G. J. Romanes 14 December 1880
- From G. E. Mengozzi 15 December 1880
- From James Torbitt 15 December 1880
- To Hermann Vöchting 16 December 1880
- From Otto Hahn 16 December 1880
- From W. R. Browne 16 December 1880
- To W. R. Browne 18 December 1880
- To W. E. Darwin 17 December [1880]
- From Asa Gray to Francis Darwin 17 December 1880
- To G. J. Allman 17 December 1880
- To W. H. Flower 17 December 1880
- From G. J. Romanes 17 December 1880
- To James Torbitt 19 December 1880
- To G. J. Romanes 20 December 1880
- To J. D. Hooker 20 December 1880
- To Patrick Geddes 20 December 1880
- From James Geikie 20 December 1880
- To Otto Hahn 20 December 1880
- From W. R. Browne 21 December 1880
- To Daniel Mackintosh 21 December 1880
- To W. R. Browne 22 December 1880
- To Albert Günther 22 December [1880]
- To J. L. Hawkins 23 December 1880
- To D. F. Nevill 23 December 1880
- From James Torbitt 23 December 1880
- To T. H. Huxley [29 December 1880]
- From Emma Darwin to J. B. Innes 24 December [1880]
- From Daniel Mackintosh 24 December 1880
- To J. M. Herbert 25 December [1880]
- To James Torbitt 25 December 1880
- To Ernst Krause 26 December 1880
- From F. J. Cohn 26 December 1880
- To T. H. Huxley 27 December 1880
- To George Bentham 27 December 1880
- From Henry Johnson 27 December [1880]
- To Albert Günther 27 December 1880
- To Francis Darwin 27 December [1880]
- To G. D. Campbell [before 27 December 1880]
- From George Bentham 28 December 1880
- From Albert Günther [28 December 1880]
- From T. H. Huxley 28 December 1880
- To Francis Darwin [after 27 December 1880]
- To H. W. Bates [before 29 December 1880]
- To Henry Johnson 28 December [1880]
- To H. W. Bates [29 December 1880]
- To P. L. Sclater 29 December 1880
- To J. S. Burdon Sanderson 29 December 1880
- To Nature [before 30 December 1880]
- To T. H. Farrer 30 December 1880
- From W. E. Darwin 31 December [1880]
- From A. L. Kielland 31 December 1880
- From J. S. Burdon Sanderson 31 December 1880
- To Walter White 31 December 1880
- To Julius Lippert [May 1881 or later]
- From L. M. Forster to H. E. Litchfield [11 June 1881]
- To G. H. Darwin [before 25 October 1881]
- From Wilhelm Breitenbach [before 20 June 1881]
- To V. O. Kovalevsky 1 and 6 January 1881
- From A. R. Wallace 1 January 1881
- To Alexander Agassiz 1 [June] 1881
- To James Torbitt [5] January 1881
- To the Post Office Savings Bank 1 January [1877?]
- To A. R. Wallace 2 January 1881
- From Ernst Krause 2 January 1881
- To H. W. Bates 3 January 1881
- From T. H. Huxley 3 January 1881
- To the Darwin children 3 January 1881
- To W. E. Darwin 3 January [1881]
- From James Caird 3 January 1881
- From James Caird to T. H. Farrer 3 January 1881
- To W. E. Gladstone [4 January 1881]
- To Ernst Krause 4 January [1881]
- To A. B. Buckley 4 January 1881
- To H. E. Litchfield 4 January 1881
- From R. B. and H. E. Litchfield 5 January [1881]
- From Gottlieb Haberlandt 5 January 1881
- From W. E. Darwin 6 January 1881
- From W. E. Gladstone 6 January 1881
- To J. D. Hooker 6 January 1881
- To [C. E. Meetkerke] 7 January 1881
- To H. W. Bates 7 January 1881
- To A. R. Wallace 7 January [1881]
- To T. H. Huxley 7 January 1881
- To W. E. Gladstone 7 January 1881
- To A. B. Buckley 7 January [1881]
- To G. D. Campbell [7 January 1881]
- To É. M. Heckel 7 January [1881?]
- From W. R. Browne [after 7] January 1881
- From T. H. Huxley 8 January 1881
- From Ernst Krause 8 January 1881
- From A. R. Wallace 8 January 1881
- From James Torbitt 8 January 1881
- From Fritz Müller 9 January 1881
- To A. R. Wallace 10 January 1881
- To Ernst Krause 10 January 1881
- From T. L. Brunton 10 January 1881
- From Montagu Lubbock 10 January 1881
- To Joseph Fayrer [after 10 January 1881]
- To Lawrence Ruck 10 January 1881
- From H. E. Litchfield to Leslie Stephen 10 January 1881
- From Leonard Darwin to Leslie Stephen [10 January 1881]
- To Leslie Stephen 11 January 1881
- From A. B. Buckley 11 January 1881
- To F. M. Balfour 12 January 1881
- From Leslie Stephen 12 January [1881]
- From Ernst Krause 12 January 1881
- From A. B. Buckley 13 January 1881
- From W. E. Darwin 13 January [1881]
- From F. M. Balfour 13 January [1881]
- To Leslie Stephen 13 January 1881
- To W. E. Darwin 14 January [1881]
- From Leslie Stephen 14 January 1881
- To William Ogle 17 January 1881
- To T. H. Farrer 18 January 1881
- From Alphonse de Candolle 18 January [1881]
- To H. A. D. Seymour 20 January 1881
- To G. H. Darwin 20 January [1881]
- From F. J. Myers 20 January 1881
- To Wilhelm Breitenbach 20 [June] 1881
- To J.-H. Fabre 21 January 1881
- To T. H. Huxley 22 January 1881
- From W. E. Darwin [16 January 1881]
- To G. J. Romanes 24 January 1881
- From T. H. Huxley 24 January 1881
- To Alphonse de Candolle 24 January 1881
- To W. E. Darwin 25 January 1881
- To W. S. Dallas 25 January 1881
- From Asa Gray 27 January 1881
- To G. J. Romanes 28 January 1881
- To F. M. Balfour 28 January 1881
- To Asa Gray 29 January 1881
- To Ernst Krause 29 January 1881
- From A. R. Wallace 29 January 1881
- From W. E. Darwin 30 January [1881]
- To W. E. Darwin 31 January [1881]
- To W. E. Darwin [27 February 1881]
- From W. E. Darwin 3 February [1881]
- From W. E. Darwin 4 February 1881
- To W. E. Darwin 4 February [1881]
- To W. E. Darwin 5 February [1881]
- To J. H. Gilbert 5 February 1881
- From W. E. Darwin 6 February 1881
- To C. G. Semper 6 February 1881
- To Ernst Krause 7 February 1881
- From Fritz Müller 7 February 1881
- To W. E. Darwin 8 February [1881]
- From Ernst Haeckel 9 February 1881
- To Ernst Haeckel 9 February 1881
- To R. D. Fitzgerald 9 February 1881
- From Anthony Rich 9 February 1881
- To W. W. Baxter 9 February 1881
- From Ernst Krause 10 February 1881
- From Francis Darwin to Ernst Krause [after 10 February 1881]
- To G. J. Romanes 11 February 1881
- To T. R. R. Stebbing 11 February 1881
- From Josef Popper 11 February 1881
- To Gaston de Saporta 13 [May] 1881
- From T. L. Brunton 14 February 1881
- To Josef Popper 15 February 1881
- From W. E. Darwin 16 February 1881
- To Grant Allen 17 February 1881
- From W. E. Darwin 18 February 1881
- From Anton Dohrn 18 February 1881
- From Grant Allen 19 February [1881]
- To W. E. Darwin 19 February [1881]
- To Williams & Norgate 20 February 1881
- To T. M. Hocken 21 February 1881
- To Henry Edwards 21 February 1881
- To V. O. Kovalevsky 22 February [1870]
- To Nature 22 February [1881]
- To Anton Dohrn 22 February 1881
- From J. H. Gilbert 22 February 1881
- To Fritz Müller 23 February 1881
- To Francis Darwin [9 November 1881]
- To J. H. Gilbert 25 February 1881
- To J. D. Hooker 26 [February 1881]
- To G. H. Darwin 27–8 February [1881]
- From Fritz Müller 28 February 1881
- From G. J. Romanes [6 or 13 or 20] March 1881
- From ? [March 1881]
- From Anthony Rich 1 March 1881
- From Anthony Rich 4 March 1881
- To T. H. Huxley 5 March 1881
- From T. H. Huxley 6 March 1881
- To G. J. Romanes 7 March [1881]
- From Francis Galton 7 March 1881
- From J. H. Gilbert 7 March 1881
- From G. J. Romanes 7 March 1881
- To Francis Galton 8 March [1881]
- From Frank Norgate [8 March 1881]
- From Anthony Rich 8 March 1881
- From J. W. Jeudwine 8 March [1881–2]
- To G. J. Romanes 9 March [1881]
- From James Torbitt 10 March 1881
- From Henri de Saussure 14 March 1881
- From H. M. Wallis 14 March 1881
- To James Torbitt 15 March 1881
- To J. H. Gilbert 15 March 1881
- From Charles Layton 17 March 1881
- To Henri de Saussure 17 March 1881
- From B. J. Sulivan 18 March 1881
- From E. J. Loomis [19 March 1881]
- To Fritz Müller 20 March 1881
- To B. J. Sulivan 20 March 1881
- To Raphael Meldola 12 March 1881
- To W. T. Thiselton-Dyer 21 March [1881]
- To H. M. Wallis 22 March 1881
- To J. V. Carus 23 March 1881
- From G. J. Romanes 24 March 1881
- To G. J. Romanes 26 March 1881
- From H. M. Wallis 27 March 1881
- To W. B. Tegetmeier 29 March 1881
- To E. B. Tylor 29 March 1881
- To H. M. Wallis 31 March 1881
- To Henry Edwards [after 21 February 1881?]
- To Francis Darwin [9 July 1881]
- To Jules Rouquette [after 2 April 1880]
- To W. T. Thiselton-Dyer 1 April 1881
- From Marie McElroy 1 April 1881
- To W. T. Thiselton-Dyer 3 April [1881]
- To E. J. Loomis 4 April 1881
- From Frithiof Holmgren 7 April 1881
- To W. T. Thiselton-Dyer 9 April 1881
- To R. F. Cooke 10 April 1881
- From Gaston de Saporta 10 April 1881
- From R. F. Cooke 11 April 1881
- To Fritz Müller 12 April 1881
- To R. F. Cooke 12 April 1881
- To Frithiof Holmgren [14] April 1881
- From A. S. Wilson 14 April 1881
- To Nature 14 April [1881]
- To G. J. Romanes 16 April 1881
- To John Lubbock 16 April [1881?]
- From E. L. Zeuschner 16 April 1881
- To A. S. Wilson 16 April 1881
- From Alexander Agassiz 16 April 1881
- From G. J. Romanes 17 April 1881
- To G. J. Romanes 18 April 1881
- From Kate Barnes 18 April 1881
- From H. B. Taylor 18 April 1881
- From Werner von Voigts-Rhetz [after 18 April 1881]
- From T. D. Spain 19 April 1881
- From G. R. Jesse 19 April 1881
- From G. R. Jesse to The Times 19 April 1881
- To W. T. Thiselton-Dyer 21 April [1881]
- To G. R. Jesse 21 April 1881
- To The Times 21 April [1881]
- From G. R. Jesse 22 April 1881
- From G. J. Romanes 22 April [1881]
- To T. D. Spain 23 April 1881
- To G. R. Jesse 23 April 1881
- From I. P. Bishop 24 April 1881
- To G. J. Romanes 25 April 1881
- To J. C. Lyell 25 April 1881
- From G. R. Jesse 25 April 1881
- To C. E. Norton 30 April 1881
- To Eduard Koch 30 April 1881
- From W. E. Gladstone 30 April 1881
- From W. E. Darwin [13 March 1881]
- From W. E. Darwin [24 April 1881]
- To W. E. Gladstone 2 May 1881
- From Louis Piré 2 May 1881
- From S. F. Baird 3 May 1881
- To W. E. Darwin 4 May [1881]
- To Alexander Agassiz 5 May 1881
- To R. G. Whiteman 5 May 1881
- From F. A. Tscherning 6 May 1881
- From Francis Ewbank 6 May 1881
- From W. E. Darwin 7 May 1881
- To W. T. Thiselton-Dyer 7 May [1881]
- To Francis Galton 8 May [1881]
- To Alpheus Hyatt 8 May 1881
- To E. W. Bok 10 May 1881
- From Frithiof Holmgren 8 May 1881
- To W. T. Thiselton-Dyer 10 May [1881]
- To Daniel McAlpine 10 May 1881
- To Francis Darwin 12 May [1881]
- From Francis Darwin 14 May 1881
- To Werner von Voigts-Rhetz 14 May 1881
- From C. E. Södling 14 October 1881
- From Ernst Krause 15 May 1881
- To Francis Darwin 16 and 17 May 1881
- From C. E. Norton 17 May 1881
- From Alphons Engelhardt 15 April [1881?]
- To Alphons Engelhardt [after 15 April 1881?]
- To Ernst Krause 18 May 1881
- To J. V. Carus 18 May 1881
- To James Torbitt 18 May 1881
- From Alexander Agassiz 19 May 1881
- From Francis Darwin 19 [May 1881]
- To W. E. Darwin 20 May [1881]
- From James Torbitt 20 May 1881
- To Francis Darwin 20 May 1881
- From J. V. Carus 21 May 1881
- To Francis Darwin 22–3 May 1881
- From Francis Darwin 23 [May 1881]
- From W. E. Darwin 23 May 1881
- From Alpheus Hyatt 23 May 1881
- From Victor Hensen 25 May 1881
- From G. J. Romanes 25 May [1881]
- To Francis Darwin 25 May [1881]
- To H. M. Westropp 26 May 1881
- From Frithiof Holmgren 26 May 1881
- From W. H. Goodwin 27 May 1881
- To G. J. Romanes 27 May 1881
- To Francis Darwin 27 May 1881
- From J. B. Hannay 28 May 1881
- To Francis Darwin [after 27 May 1881]
- From Charles Mostyn Owen 29 May 1881
- To Yves Delage 29 May 1881
- To Francis Darwin 30 May [1881]
- From Charles Mostyn Owen [after 29 May 1881]
- From Fritz Müller 31 May 1881
- To Francis Darwin [c. 8 July 1881?]
- To C. E. Norton 1 June 1881
- From James Paget 1 June 1881
- DCP-LETT-13189
- DCP-LETT-13190
- To James Paget 3 June 1881
- To James Dawson [3 June 1881]
- From Francis Darwin [before 4 June 1881]
- To Francis Darwin 4 [June 1881]
- To Francis Darwin [c. 6 June 1881]
- From Leopold Sirk 5 June 1881
- From J. H. Gilbert 5 June 1881
- To G. H. Darwin 8 June [1881]
- To J. H. Gilbert 8 June 1881
- From G. H. Darwin [9 June 1881]
- From R. A. Blair 9 June 1881
- From J. D. Hooker 12 June 1881
- From Anthony Rich 13 June 1881
- From Francisco de Arruda Furtado 13 June 1881
- To William and Anne Siemens 13 June 1881
- From R. M. Lloyd 14 June 1881
- From George Payne 14 June 1881
- To Francis Darwin [16 June 1881]
- To J. D. Hooker 15 June 1881
- To ? 17 June 1881
- From Francis Darwin 17 June 1881
- From Francis Darwin [after 17 June 1881]
- To R. M. Lloyd 17 June 1881
- From J. D. Hooker 18 June 1881
- From A. C. Ramsay 18 June [1880]
- To J. D. Hooker 20 June [1881]
- To Fritz Müller 21 June 1881
- From Ernst Haeckel 21 June 1881
- To J. B. Hannay 22 June 1881
- From Archibald Geikie 22 June 1881
- To T. H. Huxley 22 June 1881
- From J. V. Carus 24 June 1881
- To R. A. Blair 25 June 1881
- To Ernst Haeckel 25 June 1881
- To Ernst Haeckel 26 June [1881]
- To Francis Darwin 26 June [1881]
- From Francis Darwin [19 June 1881]
- To G. J. Romanes 27 June [1881]
- From J. B. Hannay 27 June 1881
- From T. H. Huxley 28 June 1881
- From E. J. Edwards 28 June 1881
- To Francis Darwin 28 June [1881]
- To T. H. Huxley 28 June 1881
- To J. V. Carus 29 June 1881
- From Ernst Haeckel 1 July 1881
- From G. J. Romanes 1 July [1881]
- To William Graham 3 July 1881
- To Francisco de Arruda Furtado 3 and 6 July 1881
- To G. J. Romanes 4 July [1881]
- To Fritz Müller 4 July 1881
- To A. B. Buckley 6 July [1881]
- To F. M. Balfour 6 July 1881
- To Alphonse de Candolle 6 July [1881]
- To Francis Darwin 8 July 1881
- From A. R. Wallace 9 July 1881
- From Alphonse de Candolle 9 July 1881
- From F. M. Balfour 10 July 1881
- From W. W. Gull 10 July 1881
- To A. B. Buckley 11 July 1881
- To A. R. Wallace 12 July 1881
- To W. W. Gull 12 July 1881
- To Axel Blytt 13 July 1881
- To Nature 13 July [1881]
- From Francis Darwin 16 July 1881
- From C. G. Semper 16 July 1881
- To W. & J. Burrow 18 July 1881
- To ? 18 July 1881
- To Emily Talbot 19 July 1881
- To Joseph Sinel 19 July 1881
- To C. G. Semper 19 July 1881
- To G. H. Darwin 23 July 1881
- From Francis Darwin [25 July 1881]
- From Leopold Würtenberger 26 July 1881
- To W. C. Holbrook 27 July 1881
- To Japetus Steenstrup 28 July 1881
- From R. F. Cooke 28 July 1881
- To R. F. Cooke 29 July 1881
- From Lawson Tait 29 July 1881
- From Francisco de Arruda Furtado 29 July 1881
- To J. V. Carus 30 July 1881
- To Ernst Krause 30 July 1881
- From R. F. Cooke 30 July 1881
- From James Dawson 30 July 1881
- From E. L. Jellinek 30 July 1881
- To E. L. Jellinek [after 30 July 1881]
- To R. F. Cooke 31 July 1881
- From G. E. Mengozzi 31 July 1881
- To ? 31 July [1881?]
- From William Graham [before 5 August 1881]
- To John Lubbock 2 August 1881
- To Marianne North 2 August 1881
- From Leopold Würtenberger 3 August 1881
- To T. L. Brunton [4 August 1881]
- From J. D. Hooker 4 August 1881
- To William Martindale 4 August 1881
- To W. E. Darwin 4 August [1881]
- To Leopold Würtenberger 5 August 1881
- To William Graham 5 August 1881
- To J. D. Hooker 6 August 1881
- From August Dupré 6 August 1881
- To William Clowes & Sons 6 August [1881]
- To G. J. Romanes 7 August [1881]
- To Raphael Meldola 8 August 1881
- To August Dupré 8 August 1881
- From G. J. Romanes 8 August 1881
- From E. B. Aveling 9 August 1881
- To Raphael Meldola 10 August [1881]
- From Fritz Müller 9 and 10 August 1881
- From William Thompson 10 August 1881
- From J. D. Hooker 11 August 1881
- To E. B. Aveling 11 August [1881]
- To J. D. Hooker 12 August 1881
- To J. T. Page 16 August 1881
- To Williams & Norgate 16 August [1881]
- From Francisco de Arruda Furtado 17 August 1881
- To ? 18 August [1880?]
- To M. S. Vaughan Williams [after 17 August 1881?]
- From C. V. Naudin 19 August 1881
- From J. D. Hooker 20 August 1881
- To ? 20 August 1881
- To J. D. Hooker 21 August 1881
- From G. H. Darwin 21 August 1881
- DCP-LETT-13294F
- To ? 21 August 1881
- To G. H. Darwin 24 August [1881]
- From Anthony Rich 25 August 1881
- To ? 21 August 1881
- To A. B. Buckley 26 August [1881]
- From T. H. Farrer 27 August 1881
- To T. H. Farrer 28 August 1881
- To G. H. Darwin [28 August 1881]
- From G. H. Darwin 28 August 1881
- From J. D. Hooker 29 August 1881
- From G. H. Darwin [29 August 1881]
- To J. D. Hooker 30 August 1881
- To G. H. Darwin 30 August [1881]
- From Stephen Price 30 August [1881]
- To A. A. W. Hubrecht 31 August 1881
- From G. J. Romanes 31 August 1881
- To John Lubbock [18 September 1881]
- From G. H. Darwin [after 26 August 1881]
- From L. B. B. Dykes 1 September [1881]
- To Stephen Price 1 September [1881]
- To G. J. Romanes 2 September 1881
- To Francisco de Arruda Furtado 2 September 1881
- From Anthony Rich 2 September [1881]
- To John Price 3 September [1881]
- To J. D. Hooker 3 and 4 September [1881]
- From G. J. Romanes 4 September [1881]
- To ? 5 September 1881
- From Fritz Müller 6, 7, and 9 September 1881
- To G. H. Darwin 6 [October 1881]
- From J. D. Hooker 7 September 1881
- From G. H. Darwin [7 September 1881]
- To G. H. Darwin 8 September [1881]
- From S. H. Haliburton 8 September [1881]
- To T. H. Huxley 9 September 1881
- From Wilhelm Breitenbach 9 September 1881
- From W. E. Darwin [7 October 1881]
- To Fritz Müller 10 September 1881
- To Hyacinth Hooker 10 September [1881]
- From Frank Hurndall 10 September 1881
- From R. F. Cooke 10 September 1881
- To W. M. Hacon 11 September 1881
- To Francisco de Arruda Furtado 12 September 1881
- From John Harmer 12 September 1881
- From G. H. Haydon 12 September 1881
- To W. E. Darwin 13 September [1881]
- From W. M. Hacon 13 September 1881
- From George King 13 September 1881
- From J. B. Innes 14 September 1881
- To Nature [before 15 September 1881]
- To J. B. Innes 15 September 1881
- To the Darwin children 16 September 1881
- To W. E. Darwin 8 October 1881
- From W. E. Darwin [13 October 1881]
- From John Price 17 September 1881
- To J. D. Hooker 18 September [1881]
- From J. B. Innes 20 September 1881
- From S. B. J. Skertchly 20 September 1881
- To Frank Hurndall 20 September 1881
- From W. M. Hacon 20 September 1881
- To Caroline Wedgwood 20 September [1881]
- From W. E. Darwin [27 February 1882]
- From T. H. Huxley 12 September 1881
- To J. B. Innes 22 September [1881]
- From William Nation 22 September 1881
- From Herbert Spencer 22 September 1881
- To Herbert Spencer [after 22 September 1881]
- From W. M. Hacon 23 September 1881
- From H. N. Moseley 24 September 1881
- To H. N. Moseley 25 September 1881
- From W. M. Hacon 26 September 1881
- From E. B. Aveling 27 September [1881]
- From B. W. Savile 27 September 1881
- To H. T. Stainton 28 September 1881
- To C. V. Riley 28 September 1881
- From A. G. More 28 September 1881
- To A. G. More [after 28 September 1881]
- From B. J. Sulivan 29 September 1881
- From B. W. Savile 30 September 1881
- To B. J. Sulivan 30 September [1881]
- To B. W. Savile [before 8 October 1881]
- From G. H. Darwin [9 September 1881]
- From Julius Wiesner 1 October 1881
- From Peter Beveridge 3 October 1881
- From R. F. Cooke 3 October 1881
- To Julius Wiesner 4 October 1881
- To R. F. Cooke 5 October 1881
- From William Graham 5 October 1881
- To ? 5 October 1881
- From R. F. Cooke 7 October 1881
- From H. N. Moseley 7 October 1881
- From J. S. Billings 7 October 1881
- To J. S. Billings 8 [October 1881]
- From R. F. Cooke 8 October 1881
- From W. M. Hacon to Leonard Darwin 8 October 1881
- To G. S. Ffinden 8 October 1881
- From Francis Galton 9 October 1881
- To Peter Price [after 10 October 1881?]
- From A. W. Buckland 9 October 1881
- From W. C. McIntosh 9 October 1881
- From J. M. Herbert 9 October 1881
- From H. N. Moseley 9 October 1881
- From B. W. Savile 10 October 1881
- To A. W. Buckland 10 October [1881]
- From Archibald Geikie 10 October 1881
- From James Geikie 10 October 1881
- From J. W. Judd 10 October 1881
- From Julius Wiesner 11 October 1881
- From E. R. Lankester 11 October 1881
- To T. L. Brunton 11 October 1881
- From Victor Hensen 10 October 1881
- From W. M. Hacon to Leonard Darwin 11 October 1881
- To Lawson Tait 12 October 1881
- From Leonard Darwin 12 October [1881]
- To E. R. Lankester 13 October [1881]
- From Anthony Rich 13 October 1881
- To G. J. Romanes 14 October [1881]
- From R. F. Cooke 14 October 1881
- From W. M. Hacon to Leonard Darwin 14 October 1881
- From Emma Darwin to G. H. Darwin [14 October 1881]
- From G. H. Darwin 15 October 1881
- From Hugo de Vries 15 October 1881
- From Henry Johnson 15 October [1881]
- From G. H. Darwin [after 15 October 1881]
- From G. J. Romanes 16 October 1881
- From M. C. Stanley 16 October 1881
- From Francisco de Arruda Furtado 16 October 1881
- From T. L. Brunton 17 October 1881
- From R. B. Carter 17 October 1881
- From J. H. Chamberlain 17 October 1881
- To Francis Darwin 17 October 1881
- From G. H. Darwin [18 October 1881]
- From A. R. Wallace 18 October 1881
- To L. C. Harrison 18 October [1881]
- From W. R. S. Ralston 18 October 1881
- To Hugo de Vries [18 October 1881]
- From R. S. Pattrick 19 October 1881
- From W. E. Darwin 20 October [1881]
- From J. F. Galbraith 20 October 1881
- From R. B. Carter 21 October 1881
- To Fritz Müller 22 October 1881
- To J. D. Hooker 22 October 1881
- From James Croll 22 October 1881
- To Francis Darwin 22 [October 1881]
- From Francisco de Arruda Furtado 22 October 1881
- From J. D. Hooker [23 October 1881]
- From Wilhelm Pfeffer 24 October 1881
- To George King 24 October 1881
- From Edward Fry 24 October 1881
- From Félix Hément 24 December 1881
- To J. B. Dancer 25 October [1881]
- From R. F. Cooke 25 October 1881
- From Karl Möbius 25 October 1881
- To Julius Wiesner 25 October 1881
- To R. F. Cooke [after 25 October 1881?]
- From Joseph Plimsoll 26 October 1881
- From J. D. Hooker 27 October 1881
- To P. R. Head 27 October 1881
- From E. L. Henn 28 October 1881
- To William Preyer 28 October 1881
- To B. J. Sulivan 28 October [1881]
- To Francis Darwin 28 [October 1881]
- From Alfred Newton 29 October 1881
- From Fritz Müller 29 October 1881
- To J. D. Hooker 30 October 1881
- From W. C. McIntosh 30 October 1881
- To Francisco de Arruda Furtado 31 October 1881
- From Edward Parfitt 31 October 1881
- From W. E. Darwin 1 November 1881
- To E. R. Lankester 31 October 1881
- To Hugo de Vries 9 December 1881
- To Camilla Pattrick [after 6 November 1881]
- From F. B. Zincke 1 November 1881
- From L. J. Jones 1 November [1881]
- To S. H. Vines 1 November 1881
- To Archibald Geikie 11 November 1881
- To L. J. Jones 2 November 1881
- From W. B. Tegetmeier 2 November 1881
- To J. V. Carus 2 November 1881
- From S. H. Vines 2 November [1881]
- To C.-F. Reinwald 2 November 1881
- To F. B. Zincke 3 November 1881
- To W. B. Tegetmeier 3 November 1881
- From Charles Layton 3 November 1881
- From J. F. Simpson 4 November 1881
- To S. H. Vines 4 November 1881
- From R. F. Cooke 5 November 1881
- From T. H. Farrer 5 November 1881
- To L. J. Jones 6 November 1881
- To John Lubbock 6 November 1881
- From Wilhelm Pfeffer 6 November 1881
- From T. M. Reade 6 November 1881
- To R. F. Cooke 6 November 1881
- From A. E. Graves 6 November 1881
- To F. B. Zincke 7 November 1881
- From C. J. Breese 7 November 1881
- From Sarah Marshall 7 November 1881
- To Nature 7 November [1881]
- To T. M. Reade 8 November 1881
- From F. B. Zincke 8 November 1881
- From J. F. Simpson 8 November 1881
- From Francis Darwin [21 October 1881]
- To A. E. Graves 9 November 1881
- To Francis Darwin 9 November [1881]
- From Edmund Mojsisovics von Mojsvár 10 November 1881
- To J. F. Galbraith 11 November 1881
- From Julius Wiesner 11 November 1881
- To G. J. Romanes 12 November 1881
- To W. T. Thiselton-Dyer 12 November [1881]
- To Fritz Müller 13 November 1881
- From J. C. Clutterbuck 13 November 1881
- From J. P. Taylor 14 November 1881
- From Archibald Geikie 14 November 1881
- To Francis Darwin 14 November [1881]
- From Francis Darwin [after 14 November 1881]
- From R. S. Bartleet 15 November 1881
- To S. H. Vines 15 November 1881
- To W. T. Thiselton-Dyer 16 November 1881
- To J. P. Taylor 16 November 1881
- From G. H. Darwin 17 November 1881
- To G. H. Darwin 19 November [1881]
- To T. L. Brunton 19 November 1881
- From Adolphe Damseaux 19 November 1881
- To J. D. Hooker 4 November [1881]
- To K. M. Lyell 20 November 1881
- To W. T. Thiselton-Dyer 20 November [1881]
- From G. H. Darwin [20 November 1881]
- From W. P. Snow 21 November 1881
- From T. L. Brunton 21 November 1881
- From Frederick Capes 21 November 1881
- From W. E. Darwin 21 November 1881
- From George King 21 November 1881
- From W. C. McIntosh 21 November 1881
- From Francisco de Arruda Furtado 21 November 1881
- To W. C. McIntosh [after 21 November 1881]
- From Francis Darwin to George King [after 21 November 1881]
- From Thomas Birkett 22 November 1881
- From G. H. Darwin [22 November 1881]
- To T. L. Brunton 22 November 1881
- To W. P. Snow 22 November 1881
- To S. H. Vines 22 November 1881
- To Frederick Capes 23 November 1881
- To ? 23 November 1881
- To P. P. C. Hoek 23 November 1881
- To A. R. Wallace 23 November 1881
- From Gustav Wegner 24 November 1881
- From S. H. Vines 24 November [1881]
- From C.-F. Reinwald 24 November 1881
- To G. H. Darwin 25 November [1881]
- To J. V. Carus 26 November 1881
- To S. H. Vines 27 November 1881
- To C.-F. Reinwald 27 November 1881
- From T. L. Brunton 27 November 1881
- From E. T. Crabbe 27 November 1881
- From H. N. Moseley 27 November 1881
- To W. R. Browne 23 November 1881
- To E. F. Gladwin 28 November 1881
- From Asher & Co. 28 November 1881
- To Asher & Co. 29 November [1881]
- From B. J. Sulivan 29 November 1881
- From J. C. Clutterbuck 29 November 1881
- To D. F. Nevill 29 November 1881
- To J. C. Clutterbuck [after 29 November 1881]
- From B. A. Irving 30 November 1881
- To Hugo de Vries [December 1881?]
- From J. F. Simpson 1 December 1881
- To B. J. Sulivan 1 December 1881
- To G. W. Norman 1 December 1881
- From James Paget 1 December 1881
- To James Paget 3 December 1881
- From B. J. Sulivan 3 December 1881
- From F. G. M. Powell 3 December 1881
- To F. G. M. Powell [after 3 December 1881]
- From E. B. Wilson 5 December 1881
- From Arthur Hall 5 December 1881
- From G. H. Darwin [6 December 1881]
- From J. V. Carus 6 December 1881
- To Arthur Hall 6 December 1881
- From J. B. Dunbar-Brander 7 December [1881]
- From H. N. Moseley 9 December 1881
- To G. J. Romanes 8 December 1881
- To J. V. Carus 8 December 1881
- From F. B. Zincke 8 December 1881
- From D. J. Wintle [before 9] December 1881
- To D. J. Wintle 9 December 1881
- To Horace Darwin 9 December 1881
- From W. E. Darwin 9 December 1881
- To Patrick Geddes 9 December 1881
- From Edward Parfitt 9 December 1881
- To G. J. Romanes 10 December [1881]
- From Grant Allen 10 December [1881]
- From Heinrich Simon 10 December 1881
- From M. W. Tanner 12 December 1881
- To Francis Darwin [18 December 1881]
- From W. E. Darwin 14 December [1881]
- From G. W. Turner 15 December 1881
- From W. F. Stanley 15 December 1881
- From W. W. Cheshire 15 December 1881
- From James Geikie 15 December 1881
- To James Geikie [after 15 December 1881]
- To A. P. Tilt 16 December 1881
- From Nicolai Krohn 16 December 1881
- To G. J. Romanes 17 [December 1881]
- From J. D. Hooker 17 December 1881
- To T. L. Brunton 17 December 1881
- From C. V. Riley 18 December 1881
- To Francis Galton 18 [December 1881]
- To Nicolai Krohn 18 December 1881
- From Francis Warner 18 December 1881
- To F. W. Surman 19 December [1881]
- To Fritz Müller 19 December 1881
- From G. S. Owen 19 December 1881
- From P. H. Pye-Smith 19 December 1881
- From James Geikie 19 December 1881
- From Víctor López-Seoane 19 December 1881
- To Albert Günther 19 December 1881
- From J. S. Burdon Sanderson 19 December [1881]
- To the Darwin children 20 December 1881
- To E. B. Wilson 21 December 1881
- From P. H. Pye-Smith 21 December 1881
- To W. F. Stanley 21 December 1881
- From Albert Günther 21 December 1881
- To A. E. Nordenskiöld 21 December 1881
- To Gustaf Retzius 21 December 1881
- To Albert Günther 22 December [1881]
- To F. W. Surman 22 December 1881
- From J. D. Hooker 22 December 1881
- From A. C. Horner 23 December 1881
- To G. J. Romanes [after 25 December 1881]
- From C. A. Kennard 26 December 1881
- From W. P. Marshall 26 December 1881
- To John Price 27 December 1881
- From J. J. Weir 27 December 1881
- To Víctor López-Seoane 27 December 1881
- From Arthur de Souza Corrêa 28 December 1881
- To Walter Baily 28 December 1881
- From H. C. Sorby 28 December 1881
- From W. E. Darwin 29 December 1881
- From W. P. Marshall 29 December 1881
- To J. J. Weir 29 December 1881
- From V. O. Kovalevsky 30 December 1881
- From Horatio Piggot 31 December 1881
- To G. H. Darwin [1882?]
- From T. G. Bonney to W. E. Darwin [before 2 February 1882]
- To G. J. Romanes 1 January [1882]
- From Fritz Müller 1 January 1882
- To Grant Allen 2 January 1882
- From Arthur de Souza Corrêa 2 January 1882
- To V. O. Kovalevsky 2 January [1882]
- To G. J. Romanes 3 January [1882]
- From H. C. Sorby 3 January 1882
- To Fritz Müller 4 January 1882
- From W. E. Darwin 4 January 1882
- To G. J. Romanes 6 January 1882
- To Theodor Eimer 6 January [1882]
- To Hyacinth Hooker 6 January [1882]
- From J. F. Simpson 7 January 1882
- From Hyacinth Hooker 7 January 1882
- To the Darwin children 8 January 1882
- From J. W. Judd 8 January 1882
- From J. H. Gilbert 9 January 1882
- From Gottlieb Haberlandt 9 January 1882
- To C. A. Kennard 9 January 1882
- To James Torbitt 10 January 1882
- To T. H. Farrer 10 January 1882
- From Raphael Meldola 11 January 1882
- To F. J. Cohn 11 January 1882
- From Francis Darwin to Raphael Meldola 12 January 1882
- To T. H. Huxley 12 January 1882
- From J. D. Hooker 12 January 1882
- From Leslie Stephen 12 January 1882
- From F. B. Sanborn 12 January 1882
- To J. H. Gilbert 12 January 1882
- From T. H. Farrer 13 January 1882
- From William Trelease 14 January 1882
- From J. F. Simpson 15 January 1882
- From W. E. Darwin 16 January [1882]
- From A. B. Mitford 17 January 1882
- From William Ogle 17 January 1882
- To William Ogle 17 January 1882
- From Michael Foster 18 January 1882
- From V. O. Kovalevsky 18 January [1882]
- From J. D. Hooker 19 January 1882
- From Melchior Neumayr 19 January 1882
- To G. J. Romanes 20 January 1882
- To J. D. Hooker 20 January 1882
- From W. C. Brooks 20 January [1882]
- From J. D. Kendall 20 January 1882
- To G. H. Darwin 21 January 1882
- To J. W. Ellis 21 January 1882
- To John Murray 21 January 1882
- From G. C. Robertson to G. J. Romanes 21 January 1882
- From James Sinclair 21 January 1882
- From H. Y. Thompson 21 January 1882
- From G. H. Darwin [22 January 1882]
- To F. B. Sanborn 22 January 1882
- To G. J. Romanes 23 [January 1882]
- From G. H. Darwin [23 January 1882]
- From G. H. Darwin 23 January 1882
- To Emil Holub 23 January 1882
- From Francis Darwin to Alphonse de Candolle 24 January [1881]
- From James Williams 24 January 1882
- To G. J. Romanes 25 [January 1882]
- To [A. J. Woodhouse?] 25 January [1867?]
- From W. E. Darwin 25 January 1882
- From Edith Evans 27 January [1882]
- To G. J. Romanes 28 January 1882
- To Edith Evans 28 January 1882
- To James Sinclair [28 January 1882]
- From Emil Holub 28 January 1882
- From C. A. Kennard 28 January 1882
- From H. M. W. Baynes 30 January 1882
- From Raphael Meldola 31 January 1882
- From Anthony Rich 1 February 1882
- To Raphael Meldola 2 February 1882
- From W. E. Darwin 2 February [1882]
- From Raphael Meldola 3 February 1882
- From F. W. Surman 3 February [1882]
- To G. S. Astley [after 3 February 1882]
- To J. D. Cooper 4 February 1882
- To Anthony Rich 4 February 1882
- From A. T. Rice 4 February 1882
- To Emil Holub 4 February 1882
- To S. H. Vines 4 February 1882
- To Raphael Meldola 5 February 1882
- From T. G. Bonney 5 February 1882
- From Raphael Meldola 6 February 1882
- From Henry Johnson 6 February 1882
- From S. H. Vines 6 February 1882
- From Joseph Hewett 6 February 1882
- To Henry Johnson 7 February 1882
- From William Horsfall 7 February 1882
- To William Horsfall 8 February 1882
- To Edward Frankland 8 February 1882
- To Trübner & Co. 9 February [1882]
- To W. E. Darwin 9 February 1882
- From W. E. Darwin 9 January [1882]
- From Anton Dohrn 9 February 1882
- From Edward Frankland 9 February 1882
- To [Greville Williams?] 10 February 1882
- To G. Clinch 10 February 1882
- From Henry Johnson 11 February 1882
- To John Lubbock 11 February 1882
- From Max Steffen 12 February 1882
- From T. L. Brunton 12 February 1882
- To John Tyndall 13 February 1882
- To W. B. Carpenter 13 February 1882
- To Lawson Tait 13 February 1882
- From Emma Darwin to F. J. Hughes 13 February 1882
- From Hugo Schneider 13 February 1882
- To A. A. Reade 13 February 1882
- To Anton Dohrn 13 February 1882
- To T. L. Brunton 14 February 1882
- From J. L. Ambrose 15 February 1882
- From John Tyndall 15 February 1882
- To John Collier 16 February 1882
- To K. M. Lyell 16 February 1882
- To Giuseppe Merighi 16 February [1882]
- To H. W. Bates 17 February 1882
- To Max Steffen 17 February 1882
- From W. D. Crick 18 February 1882
- From A. H. Kepley 20 February 1882
- To John Brown 20 February 1882
- From A. G. Dew-Smith 21 February [1882]
- To W. D. Crick 21 February 1882
- To William Ogle 22 February 1882
- From John Lubbock to Francis Darwin 22 February 1882
- To J. D. Cooper 22 February 1882
- To Henry Johnson 22 February 1882
- From Wilhelm Breitenbach 22 February 1882
- From John Collier 22 February 1882
- To Raphael Meldola 23 February 1882
- To Walter White 23 February 1882
- To G. H. Darwin 24 February [1882]
- From W. D. Crick 24 February 1882
- From A. G. Dew-Smith 25 February 1882
- To W. D. Crick 25 February 1882
- From Daniel Mackintosh 25 February 1882
- From A. V. Dicey 25 February 1882
- To H. H. Leng 26 February 1882
- To J. C. Lyell 25 February 1882
- From W. T. Van Dyck 27 February 1882
- To Daniel Mackintosh 28 February 1882
- From W. E. Darwin 28 February [1882]
- To Ignatius Donnelly 2 March 1882
- To John Lubbock 2 March 1882
- From Adolf Ernst 2 March 1882
- From W. D. Crick 3 March 1882
- From C. B. Plowright [before 6? March 1882]
- From M. A. Peek to C. B. Plowright 6 March 1882
- From Jules Barrois 6 March [1882]
- To Jules Barrois [after 6 March 1882]
- From Charles Naudin 8 March 1882
- From W. D. Crick 9 March 1882
- To W. D. Crick 10 March [1882]
- From G. F. Crawte 11 March 1882
- To W. W. Baxter 11 March 1882
- To ? 12 March 1882
- From James Niven to Francis Darwin 12 March 1882
- From W. E. Darwin 13 March 1882
- From W. E. Darwin 15 March 1882
- From Andrew Clark 17 March 1882
- From J. F. Simpson 18 March 1882
- From P. H. Pye-Smith 18 March 1882
- From Agnes Taylor 20 March [1882]
- To William Jenner 20 March [1882]
- To Francis Galton 22 March [1882]
- To Symington Grieve 22 March 1882
- To W. D. Crick 23 March 1882
- From W. E. Darwin 23 March 1882
- From Francis Galton 23 March 1882
- From Grant Allen 24 March 1882
- To W. H. Newberry 24 March 1882
- From W. D. Crick 24 March 1882
- From G. C. Wallich 25 March 1882
- From T. H. Huxley 25 March 1882
- To W. D. Crick 26 March 1882
- From Agnes Taylor 26 March [1882]
- From William Trelease 26 March 1882
- To T. H. Huxley 27 March 1882
- To Henry Groves 27 March 1882
- To Patrick Geddes 27 March 1882
- To G. C. Wallich 28 March 1882
- To Mr Loct? 29 March 1882
- To ? 29 March 1882
- To G. J. Romanes 29 March [1882]
- From Francis Darwin to Lawson Tait [30 March 1882]
- To Joseph Fayrer 30 March 1882
- From Fritz Müller 31 March 1882
- From Henry Groves 1 April 1882
- From Joseph Fayrer 2 April 1882
- To P. L. Sclater 3 April 1882
- To Henry Groves 3 April 1882
- To Adolf Ernst 3 April 1882
- From J. L. Ambrose 3 April 1882
- To W. T. Van Dyck 3 April 1882
- To Federico Philippi 3 April 1882
- To Margaret Hadley 4 April 1882
- From H. N. Moseley 5 April 1882
- To Nature [before 6 April 1882]
- To Margaret Hadley 6 April [1882]
- To W. E. A. Axon 7 April [1882]
- To H. N. Moseley 7 April 1882
- From H. N. Moseley 8 April 1882
- From A. N. Hopkins 9 April 1882
- To J. E. Todd 10 April 1882
- From William Ogle 12 April 1882
- From C. V. Naudin 15 April 1882
- To J. L. Ambrose 15 April 1882
- To William Watson 17 April 1882
- From Emma Darwin to J. D. Hooker [20 April 1882]
- From William Graham to Francis Darwin [after 20 April 1882]
- From John Lubbock to G. G. Bradley 22 April 1882
- From W. E. Darwin and G. H. Darwin to John Lubbock 22 April 1882
- To James Porter 18 April 1882
- From A child of God [after 24 February 1871?]
- To R. H. Bakewell 30 April [1856–68]
- To ? 19 March [1860–1?]
- To [W. A. Leighton?] [1840–77?]
- To ? 8 December [1861–8]
- From J. W. Abernethy [after 18 February 1871]
- To William Baxter or W. W. Baxter 21 March [1843–82]
- To William Baxter or W. W. Baxter 16 March [1843–82]
- To W. W. Baxter 11 December [1873–5?]
- To William Walmisley Baxter 26 January [1862]
- To W. W. Baxter? 10 November [1872–4]
- To William Baxter 2 October [1847?]
- To [William Baxter or W. W. Baxter?] 10 [October 1842 – April 1882]
- From Thomas Barbot Beale 17 December [1868 or later]
- To George Bentham 27 January [1858]
- From Marcellin de Bonnal [1877]
- From J. S. Bowerbank [4 November 1867]
- To William Bowman 16 May [1869–81]
- From William Thomas Bridges? 14 July [1868–70?]
- From Ludwig Büchner 9 October [1868 or later]
- To Charles James Fox Bunbury [20 March 1855]
- From M. D. Conway 12 October [1876]
- To John Crawfurd 25 March [1861]
- To Edward Cresy 26 [December 1843 – April 1846 or September 1855 – October 1860?]
- To Edward Cresy 8 January [1862 or 1868]
- To E. A. Darwin 7 September [1871]
- From E. A. Darwin [1873–81]
- From Emma Darwin to Hermann Kindt 14 October [1864]
- From Emma Darwin to ? [October 1874 – April 1882]
- To Francis Darwin [after 12 October 1866]
- To Francis Darwin [before 26 June 1873]
- From Francis Darwin [after August 1872?]
- To Francis Darwin [after 23 July 1874]
- DCP-LETT-13797
- To [Susan? Darwin] [1843 – 8 March 1846]
- DCP-LETT-13798F
- To W. E. Darwin 22 February [1863 or later]
- To W. E. Darwin [1850–4?]
- To W. E. Darwin 23 [February 1872 – October 1874]
- From Edmund Saul Dixon [April–June 1849]
- To Peter Martin Duncan 13 April [1868?]
- From [Mr Edwards?] [before end of 1839?]
- To T. C. Eyton 12 [May 1861 – April 1863]
- From Hugh Falconer [1842–3]
- To Miss Fenwick 8 February [1871–82]
- To S. P. Woodward [April 1850 – January 1851]
- From W. D. Fox [before 1 March 1866]
- To W. D. Fox [before 3 October 1846]
- From W. D. Fox to [G. H. Darwin] [1875–80]
- To Francis Galton [November 1874 – April 1882]
- To John Gould [c. October 1846]
- To Asa Gray 29 January [1875]
- From J. E. Gray [1846–54]
- From J. E. Harting 1 May [1880?]
- To J. D. Hooker [4 March 1868]
- To J. D. Hooker 22 [January 1844 – March 1882]
- To T. H. Huxley [1860–70?]
- From John Innes 9 January [1858–9]
- From Henry Jackson [1873?]
- To R. B. Litchfield 19 July [1875–81]
- To the London Library 1 February [1846?]
- To Charles Lovegrove 14 December [1859–71]
- To Charles Lovegrove 9 July [1861?]
- To E. F. Lubbock 18 July [1878]
- To Camilla Ludwig 21 February [1863 or later]
- To Charles Lyell [1847 or 1848]
- To Charles Lyell [22 November 1866 – 14 December 1871]
- To K. M. Lyell 26 December [1875]
- From William Charles Linnaeus Martin [1859–61]
- To Charles Edward and Mary Kingford Mudie 10 December [1842–5 or 1855–68]
- To Matthias Mull [after 24 November 1859]
- From Roderick Impey Murchison [1846?]
- To Roderick Impey Murchison 3 June [1855]
- DCP-LETT-13832
- To Richard Owen [November 1847–51]
- To Richard Owen 23 December [1847–54]
- To John Price 18 September [1875–81]
- To John Price 8 September [1877–80?]
- To H. E. Dresser [10 September 1875]
- To Adolph Reuter 24 July [1869]
- To G. J. Romanes [before 26 April 1876]
- From G. J. Romanes [before 6 June 1877]
- To P. L. Sclater 22 May [1860–81]
- From Caroline Shuttleworth 27 November [1871–80?]
- From Cecil Smith [1873?]
- From M. I. Snow 29 [November 1872 or later]
- To George Brettingham Sowerby Jr 9 January [1850]
- To Philip Henry Stanhope 30 July [1852]
- From John Storer to William Boyd Dawkins [before 3 October 1875]
- DCP-LETT-13846
- From B. J. Sulivan [November 1838 – April 1839]
- From Aleksander Jelski [1860–82]
- From D. Thomas [after 11 March 1871]
- From William Turner [after 28 April 1866?]
- From John Walton [after 4 April 1866]
- To G. R. Waterhouse 10 [June 1844 – March 1845]
- From H. C. Watson [after 24 July 1861]
- From Hensleigh Wedgwood [13–19 March 1859]
- To Josiah Wedgwood III [May 1844]
- From R. H. Wedgwood [1871–82]
- From S. E. Wedgwood [1867–72?]
- From Charles Wicksted to Georgina Tollet 13 March [1870?]
- To ? [after 1836?]
- To ? [1870–82]
- From [?] [?]
- From [?] [?]
- From [?] [?]
- To E. F. Lubbock [1 October 1866]
- To ? [February 1838 – February 1841?]
- To [Williams & Norgate] [1878 – November 1880]
- To W. E. Darwin [1861–82]
- To [?] [?]
- To ? [?]
- To ? 1 March [1843–82]
- To ? 28 April [1863?]
- To ? 2 May [1869 or later]
- To ? 7 August [1843–68?]
- To ? 7 December [1855–7?]
- DCP-LETT-13867F
- To ? [1842–82]
- To [H. B. Jones?] 13 April [1866]
- To B. W. Hawkins [1848–51]
- From [J. B. Innes] [after 8 February – August 1855]
- To William Pamplin 4 [July 1862]
- To ? 31 December [1852–3]
- To ? 23 January [1843–6 or 1856–69]
- To Hermann Kindt 17 September 1864
- DCP-LETT-13874F
- To ? [1860–82?]
- To ? [1860–82?]
- To Charles Kingsley [17 June 1865]
- To ? 11 March [1862–9]
- To ? 29 March [1862–9]
- To ? 20 June [1861–8]
- To ? 24 August [1861–8]
- To ? 25 November [1861–8]
- To ? 31 December [1861–8]
- To John Scott 8 January [1864]
- DCP-LETT-13883
- To ? 23 August [1870–80]
- To ? [1870–82]
- To ? 27 September [1871–81]
- To ? 18 November [1871–81]
- From ? [1872–5?]
- To ? 19 May [1871]
- To ? 31 [January 1875–82]
- To ? 3 February [1875–82?]
- To [W. W. Baxter?] [after June 1857]
- To George Rolleston [1860–82]
- From Daniel Oliver 16 September 1862
- From H. C. Watson [16 May 1864]
- To [William Sharpey] [1853–72?]
- To V. O. Kovalevsky 4 March 1873
- To ? [1839–82]
Name registry
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- George Edward Simonds Boulger
- Peter Francis Bourgeois
- Louis Sulpice (Louis) Bouton
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- Francis Bowen
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- James Henry Bowker
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- William Bowman, 1st baronet
- John Charles Bowring
- John Bowring
- W. J. E. Boyes
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- Christian Ludwig Brehm
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- Wilhelm Breitenbach
- Bernard Peirce Brent
- John Brent
- Thomas Brereton
- William Henry Breton
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- Thomas Mayo Brewer
- David Brewster
- Jane Kirk Purnell (1827–1857)
- Juliet Macpherson (1776–1810)
- George Augustus Frederick Henry Bridgeman, 2d earl of Bradford
- John Robert Orlando Bridgeman
- Thomas Bridges
- Thomas Bridges
- William Thomas Bridges
- Laura Dewey Bridgman
- William Kencely Bridgman
- John Brigg
- John Joseph Briggs
- Mark Briggs
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- Anna Maria Bristowe
- Albertine Eugenie Elizabeth (Albertine) Lavit (1835–1856)
- Henry Fox Bristowe
- John Syer Bristowe
- Mary Ann Bristowe
- Samuel Boteler Bristowe
- Samuel Ellis Bristowe
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- Pierre Paul (Paul) Broca
- Frederick Yorke Brocas
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- Benjamin Collins Brodie, Jr, 2d baronet
- Peter Bellinger Brodie
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- Alexandre Brongniart
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- William Brooks
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- Edwin Brown
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- Walter Browne
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- James Bruce
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- Francis Buchanan (1762–1818)
- John Young Buchanan
- James Buchanan
- John Buchanan
- John Buchanan
- Walter Buchanan
- Anne Walbank Buckland
- Francis Trevelyan (Frank) Buckland
- William Buckland
- Henry Thomas Buckle
- William Buckler
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- Samuel Botsford Buckley
- James Buckman
- George Bowdler Buckton
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- Benjamin Edmund Bult
- Edward George Earle Lytton Bulwer-Lytton, 1st Baron Lytton
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- Edward Herbert Bunbury
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- Joseph Butler
- Mary Butler
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- Barbara Stephen (1791–1820)
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- James Clark, 1st baronet
- William Clark
- William Clark
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- Edward Clive
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- Robert Henry Clive
- Robert Herbert Clive
- Richard Clive
- Robert (‘Clive of India’) Clive, Baron Clive
- William Clive
- William Clive
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- Edgar Cockell
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- Thomas William Coke, earl of Leicester of Holkham
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- William Congreve, 2d baronet
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- Emily Catherine (Catherine) Darwin (1810–1863)
- Edward Levett Darwin
- Elizabeth de St Croix Darwin
- Edward Darwin
- Elizabeth Collier (1747–1769)
- Elizabeth (Bessy, Lizzy) Darwin
- Emma Wedgwood (1808–1839)
- Erasmus Darwin
- Frances Sarah Darwin (1822–1845)
- Francis Sacheverel Darwin
- Francis Darwin
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- George Howard Darwin
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- William Darwin
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- Robert Hugh Job
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- William Augustus Johnson
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- Letitia Elizabeth Landon
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- Maria Acland
- Frances Acland (1806–1840)
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- Maria Lawford (1781–1800)
- Mary Charlotte Wigley (1802–1811)
- Anna Willets (1768–1805)
- Louisa Holland (1810–1857)
- Frances Matilda Buchanan (1845–1873)
- William Oswald (Bill) Milne
- Louisa Katherine Partridge (1846–1879)
- Thomas Edward Champion (Ted) Streatfeild
- Hannah Fry (1812–1832)
- Isabella Hamilton Walker (1813–1837)
- George Edward Paget
- Anna Bronson Alcott (1831–1860)
- Louisa May Alcott
- Elizabeth Sewall Alcott
- Abby May (May) Alcott (1840–1878)
- Tatiana Kirillovna (Татьяна Кирилловна Семенова) Semenova (1845–1867)
- Vera Alexandrovna Kovalevskaya (Вера Александровна Ковалевская)
- Vladimir Alexandrovich Kovalevsky (Владимир Александрович Ковалевский)
- Lidia Alexandrovna Kovalevskaya (Лидия Александровна Ковалевская)
- Charlotte Dorothy Gifford (1818–1844)
- Thomas Harris
- Société Royale des Sciences, des Lettres, et des Beaux-arts de Belgique
- Eliza Edmonstone
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- Hector Cameron
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- Richard Venables
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- Joseph Sydney (Sydney) Dodgshun
- Vere Henry Hobart, Lord Hobart
- John Rose
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- Ernst Eugen August (Eugene) Oswald
- Susan Holland (1811–1844)
- Elizabeth Finch
- Constance Jane Elizabeth Matilda de Rosen () (1840–1860)
- Charles George de Wahl
- Hans Robert Otto Frederick de Rosen
- Theophile Reinhold William de Rosen
- Alexander Nikolai Heinrich Georg Anton von Manderstjerna
- George Henslow
- Margaret Meek (1821–1843)
- Phillip Hall Peters
- Mary Louisa Lambton, Countess of Elgin, Lady Elgin (1819–1846)
- Francisco Xavier Gisbert (Francisco Javier Gisbert)
- Octavius March
- Lillie Devereux Blake
- Herbert Hutchings
- Richard Howe Browne
- Harriett Rebekah Mytton (1798–1817)
- Harriet Perkins
- Mary Jones (1767–1801)
- Alexander Monro, tertius
- Unidentified