| Reference number | Title | Date |
| EC/1882/09 | Darwin, Sir Francis: certificate of election to the Royal Society | |
| NLB/34/70 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary of the Royal Society | [November 1906] |
| NLB/25/108 | Copy letter from Theodore E James, to Francis Darwin, Fellow of the Royal Society | [11 August 1902] |
| NLB/36/236 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Secretary, Royal Society | 27 September 1907 |
| NLB/3/16 | Copy letter from Herbert Rix, to Francis Darwin, Fellow of the Royal Society | 15 February 1889 |
| NLB/3/273 | Copy letter from Herbert Rix, to Francis Darwin, Fellow of the Royal Society | 26 April 1889 |
| NLB/3/519 | Copy letter from Herbert Rix, to Francis Darwin, Fellow of the Royal Society | 1 July 1889 |
| NLB/3/545 | Copy letter from Herbert Rix, to Francis Darwin, Fellow of the Royal Society | 8 July 1889 |
| NLB/6/586 | Copy letter from Theodore E James, to Francis Darwin, Fellow of the Royal Society | 8 June 1892 |
| NLB/6/58 | Copy letter from Herbert Rix, to Francis Darwin, Fellow of the Royal Society | 22 February 1892 |
| NLB/5/399 | Copy letter from Herbert Rix, to Francis Darwin, Fellow of the Royal Society | 3 June 1891 |
| NLB/5/401 | Copy letter from Herbert Rix, to Horace Darwin | 3 June 1891 |
| NLB/10/924 | Copy letter from Herbert Rix, to Lord Rayleigh [John William Strutt] | 8 March 1895 |
| NLB/10/211 | Copy letter from Herbert Rix, to Francis Darwin, Fellow of the Royal Society | 22 October 1894 |
| NLB/10/775 | Copy letter from Herbert Rix, to Francis Darwin, Fellow of the Royal Society | 4 February 1895 |
| NLB/10/389 | Copy letter from Herbert Rix, to Professor Michael Foster | 16 November 1894 |
| NLB/9/310 | Copy letter from Herbert Rix, to Francis Darwin, Fellow of the Royal Society | 27 April 1894 |
| NLB/11/375 | Copy letter from Herbert Rix, to Sir John Evans, Treasurer, Royal Society | 18 June 1895 |
| NLB/12/170 | Copy letter from Herbert Rix, to Professor Harry Marshall Ward, Fellow of the Royal Society | 23 December 1895 |
| NLB/23/1/139 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 1 October 1901 |
| NLB/24 | New Letter Book volume 24, copy letters sent from Royal Society administration | 13 February 1902-21 July 1902 |
| NLB/14/272 | Copy letter from Robert William Frederick Harrison, to Francis Galton, Fellow of the Royal Society | 8 February 1897 |
| NLB/49 | New Letter Book volume 49, copy letters sent from Royal Society administration | 27 October 1913-6 April 1914 |
| NLB/50 | New Letter Book volume 50, copy letters sent from Royal Society administration | 6 April 1914-17 November 1914 |
| RR/16/250 | Memoranda from Robert William Frederick Harrison, and reply from Francis Darwin, on a paper 'Some new species of lagenostoma: A type of pteridospermous seed from the coal measures' by E A Newell Arber | 16 February 1905 |
| RR/16/11 | Referee's report by Francis Darwin, on a paper 'Mechanical and electrical response in plants' by Jagadis Chunder Bose | [February 1904] |
| RR/16/173 | Referee's report by Francis Darwin, on report submitted to the Evolution Committee, II, regarding three papers 'Experimental Studies in the Physiology of Heredity' by William Bateson, E R Saunders and Reginald Crundall Punnett, 'Experiments with Poulty' by C C Hurst, and 'Some Experiments on Wheat-breeding' by Rowland Harry Biffen | September 1904 |
| RR/16/134 | Referee's report by Francis Darwin, on a paper 'The histology of Uredo dispera, Erikss, and the 'Mycoplasm' Hypothesis' by Harry Marshall Ward | March 1903 |
| NLB/26/707 | Copy letter from Robert William Frederick Harrison to, Francis Darwin, Fellow of the Royal Society, Wychfield, Cambridge | 18 May 1903 |
| RR/16/224 | Referee's report by Francis Darwin, on a paper 'The action of wood on a photographic plate in the dark' by William James Russell | 4 July 1904 |
| RR/18/7 | Referee's report by Francis Darwin, on a paper 'Further experiments on the origin of life question with certain superheated saline solutions' by Henry Charlton Bastian | 24 October 1910 |
| RR/17/446 | Referee's report by Francis Darwin, on a paper 'Experimental researches on vegetable assimilation and respiration V.—A critical examination of Sachs’ method for using increase of dry weight as a measure of carbon dioxide assimilation in leaves' by David Thoday | 19 June 1909 |
| NLB/28/103 | Copy letter from Theodore E James, to [Messrs Harrison & Sons] | 11 January 1904 |
| NLB/15/844 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society, Wychfield, Huntingdon Road, Cambridge | 22 December 1897 |
| NLB/17/60 | Copy letter from Arthur William Rucker, to Francis Darwin, Fellow of the Royal Society | 8 July 1898 |
| NLB/16/833 | Copy letter from Robert William Frederick Harrison, to A C Seward, Fellow of the Royal Society | 17 June 1898 |
| NLB/24/565 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 3 June 1902 |
| NLB/22/159 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 13 March 1901 |
| NLB/21/575 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 12 December 1900 |
| NLB/22/179 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 19 March 1901 |
| NLB/21/588 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society, Wychfield, Cambridge | 13 December 1900 |
| NLB/22/41 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 18 February 1901 |
| NLB/22/72 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 26 February 1901 |
| NLB/22/526 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society, Chairman of the Botany Committee | 30 May 1901 |
| NLB/22/642 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society, Chairman of the Botany Committee | 19 June 1901 |
| NLB/22/475 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 21 May 1901 |
| NLB/22/547 | Copy letter from Robert William Frederick Harrison, to [Francis] Darwin, Fellow of the Royal Society | 1 June 1901 |
| NLB/22/465 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 20 May 1901 |
| NLB/23/1/169 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 4 October 1901 |
| NLB/50/305 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 12 June 1914 |
| NLB/22/782 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 17 July 1901 |
| NLB/22/773 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 15 July 1901 |
| NLB/21/771 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 28 January 1901 |
| NLB/23/2/248 | Copy letter from Joseph Larmor and Michael Foster, to Francis Darwin, Fellow of the Royal Society | 30 October 1902 |
| NLB/23/2/103 | Copy letter from Alfred Bray Kempe, to Professor Andrew Russell Forsyth, Chairman of the Mathematic Committee and other Sectional Committee Chairmen | 29 June 1901 |
| NLB/31/542 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 9 October 1905 |
| NLB/23/1/388 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 5 November 1901 |
| NLB/30/186 | Copy letter from Francis Darwin, to Professor Magnus Gustaf Retzius, [Fellow of the Royal Society] | 8 February 1905 |
| NLB/23/1/434 | Copy letter from an unknown correspondent, to Francis Darwin, [Fellow of the Royal Society], Cambridge | 12 November 1901 |
| NLB/24/785 | Copy letter from Joseph Larmor, to Francis Darwin, Fellow of the Royal Society | 11 July 1902 |
| NLB/23/1/699 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society, 12 Egerton Place, S.W. | 7 January 1902 |
| NLB/24/811 | Copy letter from Joseph Larmor, to [Francis] Darwin, [Fellow of the Royal Society] | 15 July 1902 |
| NLB/24/331 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 28 April 1902 |
| NLB/24/424 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 14 May 1902 |
| NLB/25/206 | Copy letter from an unknown correspondent, to Francis Darwin, Fellow of the Royal Society | 22 September 1902 |
| NLB/25/263 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 6 October 1902 |
| NLB/25/451 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 7 November 1902 |
| NLB/25/281 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 9 October 1902 |
| NLB/25/380 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 28 October 1902 |
| NLB/25/479 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | [10] November 1902 |
| NLB/24/651 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 12 June 1902 |
| NLB/25/485 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 10 November 1902 |
| NLB/24/675 | Copy letter from Robert William Frederick Harrison, to Dr Hugo Muller, Fellow of the Royal Society | 16 June 1902 |
| NLB/24/705 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 23 June 1902 |
| NLB/25/667 | Copy letter from Robert William Frederick Harrison, to [Francis Darwin, Fellow of the Royal Society] | 5 December 1902 |
| NLB/24/809 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 16 July 1902 |
| NLB/24/728 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 1 July 1902 |
| NLB/26/236 | Copy letter from Robert William Frederick Harrison to, Francis Darwin, Fellow of the Royal Society | 16 February 1903 |
| NLB/27/218 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 21 July 1903 |
| NLB/27/239 | Copy letter from Robert William Frederick Harrison, to Professor Francis Darwin, Fellow of the Royal Society | 23 July 1903 |
| NLB/33/32 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 19 June 1906 |
| NLB/30/142 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 3 February 1905 |
| NLB/27/864 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 14 December 1903 |
| NLB/30/165 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 7 February 1905 |
| NLB/27/822 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 7 December 1903 |
| NLB/29/674 | Copy telegram from Robert William Frederick Harrison, to Francis Darwin, [Fellow of the Royal Society], Cripps' Corner, Forest Row | [November 1904] |
| NLB/30/292 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 28 February 1905 |
| NLB/34/76 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary of the Royal Society | 23 November 1906 |
| NLB/29/272 | Copy letter from Theodore E James, to Francis Darwin, Foreign Secretary of the Royal Society | 30 August 1904 |
| NLB/30/463 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 28 March 1905 |
| NLB/29/593 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary of the Royal Society | 11 November 1904 |
| MC/28/56 | Letter from Francis Darwin, 10 Madingley Road, Cambridge, to [Robert] Harrison, [Royal Society] | 13 December 1913 |
| NLB/32/259 | Copy letter from Francis Darwin, to Dr Lehmann | 8 February 1906 |
| NLB/28/750 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 11 May 1904 |
| NLB/29/473 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary of the Royal Society | 22 October 1904 |
| NLB/29/450 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary of the Royal Society | 18 October 1904 |
| NLB/31/453 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 21 September 1905 |
| NLB/32/72 | Copy letter from Robert William Frederick Harrison, to Professor Herbert Hall Turner, Fellow of the Royal Society | 21 December 1905 |
| NLB/31/599 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 17 October 1905 |
| NLB/31/815 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 17 November 1905 |
| NLB/33/206 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Foreign Secretary, Royal Society | 16 July 1906 |
| NLB/35/677 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 1 July 1907 |
| NLB/37/36 | Copy letter from Robert William Frederick Harrison to Francis Darwin FRS | 13 January 1908 |
| NLB/33/857 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 14 November 1906 |
| NLB/33/623 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 10 October 1906 |
| NLB/33/688 | Copy letter from Robert William Frederick Harrison, to Mr [Francis] Darwin, [Fellow of the Royal Society] | 22 October 1906 |
| NLB/36/10 | Copy letter from Theodore E James, to Francis Darwin, Foreign Secretary, Royal Society | 24 July 1907 |
| NLB/35/36 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 8 April 1907 |
| NLB/34/148 | Copy letter from Francis Darwin, to Professor Hugo De Vries, Fellow of the Royal Society | 4 December 1906 |
| NLB/34/235 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary of the Royal Society | 14 December 1906 |
| NLB/34/149 | Copy letter from Francis Darwin, to Professor Elias Metschnikoff, Foreign Member of the Royal Society, Institut Pasteur, Paris | 4 December 1906 |
| NLB/35/315 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Secretary, Royal Society | 14 May 1907 |
| NLB/34/674 | Copy letter from Francis Darwin, to The Rector, Royal University of Upsala, For the Senatus Aacademicus | 25 February 1907 |
| NLB/34/845 | Copy letter from Francis Darwin, to the President, Michigan Agricultural College, Lansing, Michigan, USA | 18 March 1907 |
| NLB/34/833 | Copy letter from Francis Darwin, to The President, Royal Academy of Science, Stockholm | 15 March 1907 |
| NLB/34/830 | Copy letter from Archibald Geikie, to Francis Darwin, Foreign Secretary of the Royal Society | 15 March 1907 |
| NLB/34/844 | Copy letter from Francis Darwin, to Monsieur le President, de l'Academie des sciences, Paris | 18 March 1907 |
| NLB/34/895 | Copy letter from Francis Darwin, to Monsieur le President, de l'Academie des Sciences, Paris | 22 March 1907 |
| NLB/36/534 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 12 November 1907 |
| NLB/38/539 | Copy letter from Theodore E James, to Dr Francis Darwin, Fellow of the Royal Society | 14 September 1908 |
| NLB/40/541 | Copy letter from Robert William Frederick Harrison to Francis Darwin FRS | 23 June 1909 |
| NLB/40/496 | Copy letter from Robert William Frederick Harrison to Francis Darwin FRS | 15 June 1909 |
| NLB/42/81 | Copy letter from Robert William Frederick Harrison to F [Francis] Darwin FRS | 23 March 1910 |
| NLB/41/92 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 13 October 1909 |
| NLB/42/317 | Copy letter from Robert William Frederick Harrison to F [Francis] Darwin, FRS | 18 May 1910 |
| NLB/42/206 | Copy letter from Robert William Frederick Harrison to Francis Darwin, FRS, 13 Madingley Road, Cambridge | 25 april 1910 |
| NLB/42/331 | Copy letter from Robert William Frederick Harrison to Francis Darwin FRS | 24 May 1910 |
| NLB/41/809 | Copy letter from Joseph Larmor to, Francis Darwin, Fellow of the Royal Society | 28 February 1910 |
| NLB/45/632 | Copy letter from Robert William Frederick Harrison to Francis Darwin FRS | 18 April 1912 |
| NLB/45/212 | Copy letter from Robert William Frederick Harrison to Francis Darwin FRS | 19 January 1912 |
| NLB/48/563 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 26 July 1913 |
| NLB/47/151 | Copy letter from Robert William Frederick Harrison to Francis Darwin FRS | 9 December 1912 |
| NLB/45/613 | Copy letter from Robert William Frederick Harrison to Francis Darwin FRS | 12 April 1912 |
| NLB/45/668 | Copy letter from Robert William Frederick Harrison to Francis Darwin FRS | 22 April 1912 |
| MC/28/57 | Letter from Francis Darwin, 10 Madingley Road, Cambridge, to [Robert] Harrison, [Royal Society] | 10 December 1913 |
| NLB/50/256 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 4 June 1914 |
| NLB/48/367 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 23 June 1913 |
| NLB/55/102 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Francis Darwin, FRS | 04 December 1917 |
| NLB/51/7 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Sir Francis Darwin FRS | 19 November 1914 |
| NLB/52/245 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Francis Darwin, FRS | 2 October 1915 |
| NLB/47/518 | Copy letter from Robert William Frederick Harrison to Sir Francis Darwin FRS | 13 February 1913 |
| NLB/48/267 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society, Chairman of the Botany Committee | 6 June 1913 |
| NLB/48/326 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society, Chairman of the Botany Sectional Committee | 16 June 1913 |
| NLB/48/363 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 20 June 1913 |
| NLB/48/414 | Copy letter from Robert William Frederick Harrison, to Sir [Francis] Darwin, Fellow of the Royal Society, Chairman of the Botany Sectional Committee | 1 July 1913 |
| NLB/48/476 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society, Chairman of the Botany Committee | 10 July 1913 |
| NLB/50/73 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 23 April 1914 |
| NLB/50/586 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 12 August 1914 |
| NLB/51/50 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Sir Francis Darwin FRS | 26 November 1914 |
| NLB/50/54 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 22 April 1914 |
| NLB/50/612 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 26 September 1914 |
| NLB/50/258 | Copy letter from [unknown correspondent], to Sir Francis Darwin, Fellow of the Royal Society | 5 June 1914 |
| NLB/50/285 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 9 June 1914 |
| NLB/50/33 | Copy letter from Robert William Frederick Harrison, to Sir [Francis] Darwin, Fellow of the Royal Society, The Chairman of the Botany Sectional Committee | 21 April 1914 |
| NLB/50/280 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 9 June 1914 |
| MC/21/150 | Letter from Hugo De Vries, Hortus Botanicus, Amsterdam, to Mr [Francis] Darwin | 7 November 1906 |
| NLB/50/396 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 3 July 1914 |
| NLB/50/663 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 7 October 1914 |
| NLB/50/601 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 21 September 1914 |
| NLB/50/838 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 16 November 1914 |
| NLB/50/667 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 8 October 1914 |
| NLB/50/734 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 27 October 1914 |
| NLB/51/33 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Sir Francis Darwin FRS | 24 November 1914 |
| NLB/54/561 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Francis Darwin, FRS | 19 June 1917 |
| RR/24/80 | Referee's report by Francis Darwin, on a paper 'Geotropism and the Weber–Fechner law' by James Small | [June 1917] |
| RR/20/25 | Referee's report by Francis Darwin, on a paper 'On the floral mechanism of welwitschia mirabilis (Hooker)' by Arthur Harry Church | 7 March 1914 |
| RR/32/49 | Referee's report by Frederick Frost Blackman, on a paper 'On the effect of temperature on the stomata' by Francis Darwin | February 1925 |
| RR/22/40 | Referee's report by Vernon Herbert Blackman, on a paper 'On the relation between transpiration and stomatal aperture' by Francis Darwin | August 1915 |
| RR/9/131 | Referee's report by Francis Darwin, on a paper 'On the relations of particular structural features' by David Douglas Cunningham | 1883 |
| NLB/56/579 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Francis Darwin, FRS | 20 March 1919 |
| RR/9/140 | Referee's report by Francis Darwin, on a paper 'On the continuity of the protoplasm through the walls of vegetable cells' by Walter Gardiner | 1883 |
| NLB/67/571 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Vernon Herbert] Blackman, FRS | 23 January 1925 |
| RR/14/25 | Referee's report by Sydney Howard Vines, on a paper 'Observations on stomata' by Francis Darwin | 14 June 1898 |
| RR/14/26 | Referee's report by Horace Tabberer Brown, on a paper 'Observations on stomata' by Francis Darwin | 19 June 1898 |
| RR/17/27 | Referee's report by Francis Darwin, on a paper 'On the transpiration current in plants' by Henry Horatio Dixon | [November 1906] |
| RR/15/338a | Referee's report by Francis Darwin, on a paper 'The seed-fungus of lolium temulentum. L. the darnel, or poisonous rye-grass' by E M Freeman | 2 August 1902 |
| RR/22/8 | Referee's report by Francis Darwin, on a paper 'Analyses of agricultural yield. Part II - The showing-date experiment with Egyptian cotton, 1913' by William Lawrence Balls | 24 March 1915 |
| RR/22/41 | Referee's report by Joseph Larmor, on a paper 'On the relation between transpiration and stomatal aperture' by Francis Darwin | 15 August 1915 |
| NLB/68/922 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [Frederick Frost] Blackman, FRS | 1 December 1925 |
| NLB/62/594 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Francis Darwin, FRS | 20 March 1922 |
| NLB/62 | New Letter Book volume 62, copy letters sent from Royal Society administration | 11 November 1921-10 June 1922 |
| IM/GA/Russell/001065 | Darwin, Sir Francis | 1922 |
| NLB/67/650 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Francis Darwin, FRS | 6 February 1925 |
| NLB/66/662 | Copy letter from the Royal Society; [to the Printers] | 16 June 1924 |
| NLB/68/765 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Vernon Herbert] Blackman, FRS | 30 October 1925 |
| NLB/68/858 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Arthur George] Tansley, FRS | 13 November 1925 |
| NLB/50/571 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 31 July 1914 |
| MC/19/238 | Letter from Francis Darwin, 30 Kensington Square, to [Rober William Frederick] Harrison | 19 April 1904 |
| NLB/3/721 | Copy letter from Herbert Rix, to the Secretary of The Pasteur Fund, Mansion House | 24 September 1889 |
| NLB/10/914 | Copy letter from Herbert Rix, to Francis Darwin, Fellow of the Royal Society | 6 March 1895 |
| RR/15/331 | Memoranda from Robert William Frederick Harrison, and reply from Francis Darwin, on a paper on a paper 'The physics and physiology of the protoplasmic streaming of plants' by Alfred James Ewart | 14 May 1902 |
| RR/16/101 | Referee's report by Francis Darwin, on a paper 'Cultural experiments with 'Biologic Forms' of the Erysiphaceae' by Ernest S Salmon | December 1903 |
| RR/13/295 | Referee's report by Francis Darwin, on a paper 'The relations between marine animal and vegetable life' by H M Vernon | 2 January 1898 |
| NLB/22/57 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 22 February 1901 |
| NLB/22/563 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 5 June 1901 |
| NLB/23/1/668 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 21 December 1901 |
| NLB/24/476 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Fellow of the Royal Society | 23 May 1902 |
| NLB/31/827 | Copy letter from Francis Darwin, to His Excellency the Russian Ambassador, Chesham House, Chesham Place, S.W. | 21 November 1905 |
| NLB/31/828 | Copy letter from Francis Darwin, to His Excellency the German Ambassador, 9 Carlton House Terrace, S.W. | 21 November 1905 |
| MC/21/135 | Letter from [Francis] Darwin, 13 Madingley Road, Cambridge, to [Robert William Frederick] Harrison | 17 July 1906 |
| NLB/34/515 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary of the Royal Society | 1 February 1907 |
| NLB/47/467 | Copy letter from Robert William Frederick Harrison to Sir Francis Darwin FRS, 11 Egerton Place, SW | 4 February 1913 |
| NLB/50/493 | Copy letter from Robert William Frederick Harrison, to Sir Francis Darwin, Fellow of the Royal Society | 17 July 1914 |
| RR/12/309 | Letter from Francis Darwin, regarding a paper 'On the ascent of sap' by Henry Horatio Dixon and John Joly | 7 March 1895 |
| RR/21/19 | Referee's report by Francis Darwin, on a paper 'Analyses of agricultural yield. Part I.—The spacing experiment with Egyptian cottom, 1912' by William Lawrence Balls and Francis S Holton | 5 June 1914 |
| NLB/34/834 | Copy letter from Francis Darwin, to The President, The Imperial Academy of Sciences, Vienna | 15 March 1907 |
| NLB/22 | New Letter Book volume 22, copy letters sent from Royal Society administration | 8 February 1901-2 August 1901 |
| RR/8/12 | Referee's report by John Scott Burdon-Sanderson, on a paper 'On the protrusion of protoplasmic filaments from the glandular hairs of the common teasel (Dipsacus sylvestris)' by Francis Darwin | 3 May 1877 |
| RR/15/21 | Referee's report by Francis Darwin, on a paper 'Some new observations on the static diffusion of gases and liquids and their significance in certain natural processes occurring in plants' by Horace Tabberer Brown and F Escombe | 13 July 1900 |
| MC/12/255 | Letter from F [Francis] Darwin, Down, Beckenham, to John Evans, [Treasurer of the Royal Society] | 12 June 1882 |
| MC/12/254 | Letter from F [Francis] Darwin, Down, Beckenham, to G [George Gabriel] Stokes, Secretary of the Royal Society | 11 June 1882 |
| MC/12 | Volume 12 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1880-1883 |
| RR/12/310 | Referee's report by Francis Darwin, on a paper 'On the ascent of sap' by Henry Horatio Dixon and John Joly | 24 October 1894 |
| PP/13/8 | Paper, 'Preliminary account of the morphology of the sporophyte of Splachnum luteum' by J R Vaizey | 1888 |
| RR/8/11 | Referee's report by Joseph Dalton Hooker, on a paper 'On the protrusion of protoplasmic filaments from the glandular hairs of the common teasel (Dipsacus sylvestris)' by Francis Darwin | 7 May 1877 |
| RR/12/89 | Referee's report by Francis Darwin, on a paper 'On the ascent of sap' by Henry Horatio Dixon and John Joly | 27 December 1894 |
| MC/18/35 | Letter from [Francis] Darwin, Cambridge, to [Robert William Frederick] Harrison | 15 May 1903 |
| AP/59/1 | Unpublished paper, 'On the protrusion of protoplasmic filaments from the glandular hairs on the leaves of the common teasel (Dipsacus sylvestris)' by Francis Darwin | 1877 |
| MC/19/237 | Letter from Francis Darwin, Botanical Laboratory, Cambridge, to [Robert William Frederick] Harrison | 22 February 1904 |
| MC/20/26 | Letter from [Francis] Darwin, 30 Kensington Square, to the Royal Society | [1905] |
| MC/21 | Volume 21 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1906 |
| MC/28/55 | Letter from Francis Darwin, Brookthorpe, Gloucester, to [Robert] Harrison, [Royal Society] | 24 June 1913 |
| MC/28/58 | Letter from [William Erasmus] Darwin, 11 Egerton Place, S.W, to [Robert] Harrison, [Royal Society] | 30 July 1913 |
| NLB/31/21 | Copy letter from Francis Darwin, to the Secretary, Congres International Pour L'Etude de La Radiologie Et de L'Ionisation | 8 June 1905 |
| MC/21/133 | Letter from [Francis] Darwin, 13 Madingley Road, Cambridge, to [Joseph] Larmor | 19 March 1906 |
| MC/21/134 | Letter from [Francis] Darwin, 13 Madingley Road, Cambridge, to [Robert William Frederick] Harrison | 25 June 1906 |
| NLB/33/229 | Copy letter from Robert William Frederick Harrison, to Francis Darwin, Foreign Secretary, Royal Society | 20 July 1906 |
| MC/21/136 | Letter from Francis Darwin, The Royal Society, to [Robert William Frederick] Harrison | 23 October 1906 |
| MC/29/177 | Letter from [Ernest William] MacBride, Imperial College of Science and Technology (Royal College of Science), South Kensington, London, S.W, to Mr [Robert] Harrison, [Royal Society] | 22 June 1914 |
| MC/18/34 | Letter from [Francis] Darwin, to [Robert William Frederick] Harrison | 5 March [1903] |
| MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |
| MC/18 | Volume 18 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1903 |
| MC/20 | Volume 20 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1905 |
| MC/21/413 | Letter from [John William] Mallet, University of Virginia, Charlottsville, to Francis Darwin, Foreign Secretary of the Royal Society, London | 20 March 1906 |
| MC/21/538 | Letter from Pierre [?], Ambassade Imperiale de Russie, Chesham House, to Francis Darwin, Foreign Secretary of the Royal Society, Burlington House | 22 September 1906 |
| MC/32/66 | Letter from [Francis] Darwin, Brookthorpe, Gloucester, to [Robert] Harrison, [Royal Society] | June 1917 |
| MC/32/67 | Letter from [Francis] Darwin, 10 Madingley Road, Cambridge, to [Robert] Harrison, [Royal Society] | 3 December 1917 |
| MC/34/46 | Letter from Francis Darwin, Brookthorpe, Gloucester, to Mr [Robert] Harrison, [Royal Society] | 10 March 1919 |
| MC/39 | Volume 39 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1925 |
| MC/39/104 | Letter from [Arthur George] Tansley, Grantchester, Cambridge, to [Francis Alexander] Towle | 14 November 1924 |
| MC/21/215 | Letter from [James Lachlan] Galbraith, The Library, The University, Glasgow, to the [Royal Society] | 2 October 1906 |