• `Maria' to Darwin, C. R. [1880–2]
• `Maria' to Darwin, C. R. [1880–2]
• "A child of God" to Darwin, C. R. [after 24 Feb 1871?]
• "A Great Reader" to Athenæum [before 15 Dec 1866]
• "Ponderer" to Athenæum [before 5 June 1869]
• [unknown] to Darwin, C. R. [after Jun 1871]
• Abernethy, J. W. to Darwin, C. R. [after 18 Feb 1871]
• Agassiz, Alexander to Darwin, C. R. [before 1 June 1871]
• Airy, Hubert to Darwin, C. R. [before 15] July 1872
• Anderson, James (c) to Darwin, C. R. [after 24 Feb 1871?]
• Bacon, J. B. to Drysdale, Lady [1860 or later]
• Balch, Charles to Darwin, C. R. [after 15 Apr 1871]
• Balfour, F. M. to Darwin, C. R. [after 11 Dec 1876]
• Balfour, F. M. to Darwin, C. R. [after 11] Dec [1876]
• Baranoff, W., Koch, Heinrich to Darwin, C. R. [after 31 Oct? 1871]
• Barber, M. E. to Darwin, C. R. [after Feb 1867]
• Barr, J. G. R. to Cupples, George [after 11 May 1868?]
• Bashford, F., Blyth, Edward to Darwin, C. R. [after 3 July 1855]
• Baxter, W. W. to Darwin, C. R. [after 23 Aug 1872?]
• Beall, T. B. to Darwin, C. R. 17 Dec [1868 or later]
• Beddoe, John to Darwin, C. R. [before 6 Aug 1869]
• Bentham, George to Darwin, C. R. [after 29 Sept 1868]
• Bentham, George to Darwin, C. R. [before 22 Apr 1868]
• Billinghurst, H. F. to Darwin, C. R. [21 July 1863 – Aug 1870?]
• Blyth, Edward to Darwin, C. R. [after 24 Feb 1867]
• Blyth, Edward to Darwin, C. R. [after 3 Feb 1868]
• Blyth, Edward to Darwin, C. R. [before 25 Mar 1868]
• Blyth, Edward to Darwin, C. R. 22 & 23 Aug 1855
• Bonavia, Emmanuel to Darwin, C. R. [before 7 Sept 1868]
• Boner, Charles to Darwin, C. R. [Dec 1869 – early Jan 1870]
• Bonham-Carter, Alice to Darwin, Emma 25 Jan [1867 or later]
• Bornet, J. B. E. to Darwin, C. R. [before 20 Aug 1867]
• Bowman, William to Darwin, C. R. [before 25 Jan 1872]
• Breitenbach, Wilhelm to Darwin, C. R. [before 20 June 1881]
• Brent, B. P. to Darwin, C. R. [after Aug 1856]
• Bridges, Thomas (b) to Darwin, C. R. [Oct 1860 or after]
• Bridges, W. T. to Darwin, C. R. 14 July [1868–70?]
• Bridgman, W. K. to Jeffreys, J. G. [before 21 Jan 1869]
• Bronn, H. G. to Darwin, C. R. [before 11 Mar 1862]
• Browne, W. R. to Darwin, C. R. [after 7] Jan 1881
• Büchner, F. K. C. L. to Darwin, C. R. 9 Oct [1868 or later]
• Buckland, F. T. to Darwin, C. R. [1863–7]
• Buckland, F. T. to Darwin, C. R. [before 1 Feb 1863]
• Buckland, F. T. to Darwin, C. R. [before 11 Dec 1864]
• Buckler, William to Darwin, C. R. [after 8 June 1869]
• Burningham, J. to Darwin, C. R. [10 Sept 1858 or 1859?]
• Butler, Mary to Darwin, C. R. [before 25 Dec 1862]
• Butler, Samuel (b) to Darwin, Francis [before 30 May 1872]
• Cameron, J. M. to Darwin, C. R. [before 10 July 1868]
• Carus, J. V. to Darwin, C. R. [before 8 May 1873]
• Caspary, J. X. R. to Darwin, C. R. [after 9 Jun 1866]
• Caton, J. D. to Darwin, C. R. [1869–70]
• Chance, Frank to Darwin, C. R. [before 25 Apr 1871]
• Clarke, R. T. to Darwin, C. R. [after 25 Nov 1862]
• Clarke, R. T. to Darwin, C. R. [after 27 November 1862]
• Conway, M. D. to Darwin, C. R. 12 Oct [1873 or later]
• Corfield, R. H. to Darwin, C. R. 14 & 18 July 1835
• Corfield, R. H. to Darwin, C. R. 26 & 27 June 1835
• Crocker, C. W. to Darwin, C. R. [before 13 Mar 1862]
• Crotch, G. R. to Darwin, C. R. [after 16 October 1868]
• Crotch, G. R. to Darwin, C. R. [after 5 Oct 1868]
• Crump, Charles to Blyth, Edward [before 8 Jan 1856]
• Cupples, George to Darwin, C. R. [after 5 Mar 1874]
• Cupples, George to Darwin, C. R. [before 10 Aug 1868]
• D. of Deal to Journal of Horticulture [before 9 Dec 1862]
• Daly, J. to Darwin, C. R. [before 9 Feb 1868]
• Dana, J. D. to Darwin, C. R. [before 29 Dec 1850]
• Dana, J. D. to Darwin, C. R. [before 6 Dec 1855]
• Darwin, C. R. to Auditor [before 2? June 1873]
• Darwin, C. R. to Hardwicke's Science-Gossip [b
• Darwin, C. R. to John Murray (b) [1870-1?]
• Darwin, C. R. to Librarian 27 Oct [1846 or 18
• Darwin, C. R. to Masson, Victor et fils [after
• Darwin, C. R. to R. Geogr. Soc. [30 July 1844
• Darwin, C. R. to secretary of New York Liberal Club
• Darwin, C. R. to Soc. Imp. Zool. Acclim. [afte
• Darwin, C. R. to unidentified 23 Sept [1875–81
• Darwin, C. R. to Wedgwood , L. C. 8 June [1867–72]
• Darwin, C. R. to Candidate in chemistry [1874&nd
• Darwin, C. R. to [before 15 June 1861]
• Darwin, C. R. to [before 25 May 1861]
• Darwin, C. R. to [before 27 Apr 1861]
• Darwin, C. R. to [before 4 May 1861]
• Darwin, C. R. to `Maria' [1880–2]
• Darwin, C. R. to Agassiz, Alexander 10 Sept [1871 or 1873]
• Darwin, C. R. to Airy, Hubert [before 21 Jan 1873]
• Darwin, C. R. to Alberts, Karl [after 9 Feb 1879]
• Darwin, C. R. to Alberts, Maurice [after 13 Feb 1862]
• Darwin, C. R. to Alglave, Emile [after 13 Jan 1877]
• Darwin, C. R. to Allen, C. G. B. [before 21 Feb 1879]
• Darwin, C. R. to Argyll, Duke of [before 28 Dec 1880]
• Darwin, C. R. to Arruda Furtado, Francisco d' 3 & 6 July [1881]
• Darwin, C. R. to Ashley, Miss [after 3 Feb 1882]
• Darwin, C. R. to Aveling, E. B. [after 23 Sept 1878]
• Darwin, C. R. to Babbage, Charles [14 Mar 1837 – 1838]
• Darwin, C. R. to Babbage, Charles [Feb 1839 – Aug 1842]
• Darwin, C. R. to Babbage, Charles [Oct 1839– Aug 1842]
• Darwin, C. R. to Babbage, Charles 19 [Feb 1839– Aug 1842]
• Darwin, C. R. to Babbage, Charles [1839 – Aug 1842]
• Darwin, C. R. to Badger, E. W. [after 17 July 1880]

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