| RefNo | Title | Date |
| EC/1900/04 | Farmer, Sir John Bretland: certificate of election to the Royal Society | |
| CMB/38/3 | Minutes, meeting of the Natural Products War Committee | 17 June 1918 |
| CMB/38 | Natural Products (War) Committee of the Royal Society | February 1918 to June 1918 |
| CMB/38/2 | Minutes, meeting of the Natural Products (War) Committee | 23 April 1918 |
| NLB/32/711 | Copy letter from Archibald Geikie, to Professor John Bretland Farmer, Fellow of the Royal Society, Claremont House, Wimbledon Common | 12 May 1906 |
| NLB/40/162 | Copy letter from Robert William Frederick Harrison to Professor J [John] B [Bretland] Farmer FRS | 26 April 1909 |
| MC/19/274 | Letter from [John Bretland] Farmer, Claremont House, Wimbledon Common, to [Robert William Frederick] Harrison | 1 December 1904 |
| NLB/30/539 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 11 April 1905 |
| NLB/6/260 | Copy letter from Herbert Rix, to John Bretland Farmer, Magdalen College, Oxford | 2 April 1892 |
| NLB/8/746 | Copy letter from Herbert Rix, to Professor Michael Foster, Secretary, Royal Society | 15 December 1893 |
| NLB/13/48 | Copy letter from Michael Foster and Lord Rayleigh [John William Strutt], to William Turner Thiselton-Dyer, Fellow of the Royal Society, Chairman of the Botanical Committee | 1 June 1896 |
| NLB/13/577 | Copy letter from Robert William Frederick Harrison, to Professor Michael Foster, Secretary, Royal Society | 10 October 1896 |
| NLB/13/709 | Copy letter from Robert William Frederick Harrison, to Mr Charles Baker, 224 High Holborn, W.C. | 9 November 1896 |
| RR/15/151 | Referee's report by John Bretland Farmer, on a paper 'A conjugating "yeast''' by B T P Barker | June 1901 |
| RR/15/300 | Second referee's report by John Bretland Farmer, on a paper 'The relations between certain diatoms & the fission products of a parasitic alga (Chlorochytrium)' by Henry Charlton Bastian | 19 January 1903 |
| RR/15/330 | Referee's report by John Bretland Farmer, on a paper 'The physics and physiology of the protoplasmic streaming of plants' by Alfred James Ewart | May 1902 |
| RR/16/211 | Referee's report by John Bretland Farmer, on a paper 'The origin of parasitism in fungi' by John Massee | 4 February 1904 |
| RR/15/299 | Referee's report by John Bretland Farmer, on a paper 'The relations between certain diatoms & the fission products of a parasitic alga (Chlorochytrium)' by Henry Charlton Bastian | 14 November 1902 |
| RR/16/135 | Referee's report by John Bretland Farmer, on a paper 'The histology of Uredo dispera, Erikss, and the 'Mycoplasm' Hypothesis' by Harry Marshall Ward | March 1903 |
| RR/16/83 | Referee's report by John Bretland Farmer, on a paper 'Experimental researches on vegetable- assimilation and respiration III. On the effect of temperature on Carbon Dioxide assimilation' by Gabrielle Louise Caroline Matthaei | October 1903 |
| RR/16/262 | Referee's report by John Bretland Farmer, on a paper 'Note on the free growth of bacteria & some torulae in a solution of neutral ammonia tartrate in distilled water' by Dr Henry Charlton Bastian | 20 May 1905 |
| RR/17/40 | Referee's report by John Bretland Farmer, on a paper 'On the anatomy of the Julianiaceae considered from the systematic point of view' by Felix Eugen Fritsch | [December 1906] |
| RR/17/44 | Referee's report by John Bretland Farmer, on a paper 'On a general consideration of the subaerial and freshwater algal flora of Ceylon' by Felix Eugen Fritsch | [July 1906] |
| NLB/17/57 | Copy letter from Arthur William Rucker, to Professor John Bretland Farmer, Fellow of the Royal Society, and J L Williams | 8 July 1898 |
| NLB/22/19 | Copy letter from Robert William Frederick Harrison, to Professor [John Bretland] Farmer, Fellow of the Royal Society | 12 February 1901 |
| NLB/26/628 | Copy letter from Theodore E James to, Professor John Bretland Farmer, Fellow of the Royal Society | 2 May 1903 |
| NLB/26/38 | Copy letter from Robert William Frederick Harrison to, Professor John Bretland Farmer, Fellow of the Royal Society | 19 January 1903 |
| NLB/26/681 | Copy letter from Robert William Frederick Harrison to, Professor John Bretland Farmer, Fellow of the Royal Society | 9 May 1903 |
| NLB/28/19 | Copy letter from Robert William Frederick Harrison, to the Editors of The Lancet | 19 December 1903 |
| NLB/27/847 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 11 December 1903 |
| NLB/30/379 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 15 March 1905 |
| NLB/59/97 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 16 July 1920 |
| NLB/30/692 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 8 May 1905 |
| NLB/30/719 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 10 May 1905 |
| NLB/31/5 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 7 June 1905 |
| NLB/28/735 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 9 May 1904 |
| NLB/32/53 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 19 December 1905 |
| NLB/32/32 | Copy letter from Archibald Geikie, to Professor John Bretland Farmer, [Fellow of the Royal Society] | 14 December 1905 |
| NLB/29/711 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 29 November 1904 |
| NLB/29/716 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 30 November 1904 |
| NLB/32/399 | Copy letter from Robert William Frederick Harrison, to Professor Walter Frank Raphael Weldon, Fellow of the Royal Society, Chairman of the Zoology Sectional Committee | 5 March 1906 |
| NLB/35/246 | Copy letter from Archibald Geikie, to Professor John Bretland Farmer, Fellow of the Royal Society | 3 May 1907 |
| NLB/34/665 | Copy letter from Archibald Geikie, to Professor John Bretland Farmer, Fellow of the Royal Society | 23 February 1907 |
| NLB/35/439 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 1 June 1907 |
| NLB/34/490 | Copy letter from Archibald Geikie, to Professor John Bretland Farmer, Fellow of the Royal Society | 29 January 1907 |
| NLB/34/808 | Copy letter from Archibald Geikie, to Professor [John Bretland] Farmer, Fellow of the Royal Society | 12 March 1907 |
| NLB/34/832 | Copy letter from Archibald Geikie, to Professor John Bretland Farmer, Fellow of the Royal Society | 15 March 1907 |
| NLB/37/594 | Copy letter from Robert William Frederick Harrison to Professor J [John] B [Bretland] Farmer, Fellow of the Royal Society | 10 April 1908 |
| NLB/37/696 | Copy letter from Robert William Frederick Harrison to Professor J [John] B [Bretland] Farmer, Fellow of the Royal Society | 2 May 1908 |
| NLB/38/148 | Copy letter from Archibald Geikie, to Professor [John Bretland] Farmer, Fellow of the Royal Society | 19 June 1908 |
| NLB/39/167 | Copy letter from Robert William Frederick Harrison to Professor F [Francis] W [Wall] Oliver, Fellow of the Royal Society, Chairman of the Botany Sectional Committee | 4 December 1908 |
| NLB/39/703 | Copy letter from Robert William Frederick Harrison to Professor J [John] B [Bretland] Farmer, Fellow of the Royal Society | 25 February 1909 |
| NLB/39/769 | Copy letter from Robert William Frederick Harrison to Professor J [John] B Bretland] Farmer, Fellow of the Royal Society | 9 March 1909 |
| NLB/42/324 | Copy letter from Robert William Frederick Harrison to Messrs Harrison & Sons | 19 May 1910 |
| NLB/40/758 | Copy letter from Robert William Frederick Harrison to Professor J [John] B [Bretland] Farmer FRS | 6 August 1909 |
| NLB/42/695 | Copy letter from Robert William Frederick Harrison to Professor J [John] B [Bretland] Farmer FRS | 13 August 1910 |
| NLB/46/179 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 21 June 1912 |
| NLB/44/667 | Copy letter from Robert William Frederick Harrison to Professor J [John] B [Bretland] Farmer FRS | 13 October 1911 |
| NLB/46/367 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 19 July 1912 |
| NLB/48/528 | Copy letter from Robert William Frederick Harrison, to Professor [John Bretland] Farmer, Fellow of the Royal Society | 21 July 1913 |
| NLB/51/693 | Copy letter from William Bate Hardy, Acting Biological Secretary of the Royal Society to Professor John Bretland Farmer FRS | 27 May 1915 |
| NLB/51/114 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Bretland Farmer FRS | 14 December 1914 |
| NLB/51/353 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Bretland Farmer FRS, Chairman of the Botany Committee | 22 February 1915 |
| RR/25/10 | Referee's report by Frederick Frost Blackman, on two papers 'On the quantitative differences in the water-conductivity of the wood in trees and shrubs. Part I. -The evergreens' and 'On the quantitative differences in the water-conductivity of the wood in trees and shrubs. Part II. -The deciduous plants' by John Bretland Farmer | [February 1918] |
| NLB/51/611 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Bretland Farmer FRS | 5 May 1915 |
| NLB/51/674 | Copy letter from William Bate Hardy, Acting Biological Secretary of the Royal Society to Professor John Bretland Farmer FRS | 20 May 1915 |
| NLB/53/115 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to [John Bretland] Farmer, FRS, Exmoor Forest Hotel, Simonsbath | 18 April 1916 |
| NLB/51/781 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Bretland Farmer FRS, Chairman of the Botany Committee | 29 June 1915 |
| NLB/51/473 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Bretland Farmer FRS, Chairman of the Botany Committee | 26 March 1915 |
| NLB/51/396 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Bretland Farmer, FRS | 11 March 1915 |
| NLB/52/74 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Bretland Farmer FRS | 5 August 1915 |
| NLB/52/51 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Bretland Farmer, Chairman of the Botany Sectional Committee | 30 July 1915 |
| NLB/52/134 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Bretland Farmer FRS, Chairman of the Botany Committee | 21 September 1915 |
| NLB/52/181 | Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to Professor John Bretland Farmer, Chairman of the Botany Comittee and FRS | 6 October 1915 |
| NLB/52/344 | Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to Professor John Bretland Farmer, Chairman of the Botany Committee and FRS | 11 November 1915 |
| NLB/52/444 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor John Bretland Farmer, Chairman of the Botany Committee and FRS | 10 December 1915 |
| RR/16/292 | Referee's report by John Bretland Farmer, on a paper 'Further experiments & histological investigations on intumescences with observations on nuclear division in pathological tissues' by E Dale | June 1905 |
| NLB/52/558 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor John Bretland Farmer, Chairman of the Botany Committee and FRS | 14 January 1916 |
| NLB/53/117 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to [John Bretland] Farmer, FRS, Exmoor Forest Hotel, Simonsbath | 18 April 1916 |
| RR/18/12 | Referee's report by John Bretland Farmer, on a paper 'Experimental researches on vegetable assimilation and respiration. IX - On assimilation in submerged water-plants, and its relation to the concentration of carbon dioxide and other factors' by Frederick Frost Blackman and A M Smith | December 1910 |
| RR/20/36 | Referee's report by John Graham Kerr, on a paper 'On dimensions of chromosomes considered in relation to phylogeny' by John Bretland Farmer and L Digby | 16 November 1913 |
| RR/19/91 | Referee's report by John Bretland Farmer, on a paper 'A metrical analysis of chromosome complexes, showing correlation of evolutionary development and chromatin thread-width throughout the animal kingdom' by C F U Meek | 17 February 1912 |
| NLB/54/128 | Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to Professor [John Bretland] Farmer, Chairman of the Botany Committee and FRS | 13 February 1917 |
| NLB/54/309 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, Chairman of the Botany Committee and FRS | 29 March 1917 |
| NLB/54/528 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, Chairman of the Botany Committee and FRS | 11 June 1917 |
| NLB/54/594 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, Chairman of the Botany Committee and FRS | 27 June 1917 |
| NLB/55/83 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, Chairman of the Botany Committee and FRS | 27 November 1917 |
| NLB/54/349 | Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to Professor [John Bretland] Farmer, Chairman of the Botany Committee and FRS | 19 April 1917 |
| NLB/53/64 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, Chairman of the Botany Committee and FRS | 31 March 1916 |
| RR/26/88 | Referee's report by John Bretland Farmer, on a paper 'Dictyokinesis in germ cells, or the distribution of the Golgi apparatus during cell division' by Reginald James Ludford and J Brontë Gatenby | 3 May 1921 |
| RR/55/97 | Referee's report by John Bretland Farmer, on a paper 'Rainfall and cotton yields in the Sudan Gezira' by Edward Mortimer Crowther and Frank Crowther | June 1935 |
| NLB/57/570 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor JB [Sir John Bretland] Farmer, FRS | 3 December 1919 |
| NLB/53/357 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, Chairman of the Botany Committee and FRS | 20 July 1916 |
| RR/30/80 | Referee's report by John Bretland Farmer, on a paper 'The effect of grass on trees' by Albert Howard | 21 July 1924 |
| RR/17/360 | Referee's report by John Bretland Farmer, on a paper 'The colours and pigments of flowers with special reference to genetics' by Muriel Wheldale | 14 November 1908 |
| NLB/58/123 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 17 March 1920 |
| NLB/58/20 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 2 March 1910 |
| RR/32/75 | Referee's report by John Bretland Farmer, on a paper 'A critical statistical study of experimental data on the effect of minute electric currents on the growth rate of the coleoptile of barley' by F G Gregory and L Batten | July 1925 |
| NLB/66/881 | Copy letter from [William Bate Hardy, Secretary of] the Royal Society; to Prof. [Ernest William] MacBride, FRS | 4 August 1924 |
| RR/17/302 | Referee's report by John Bretland Farmer, on a paper 'The electrical forces of mitosis and the origin of cancer' by Jessup, Baly, Goodbody and Prideaux | July 1908 |
| RR/36/40 | Referee's report by John Bretland Farmer, on a paper 'Linkage groups and chromosome number in Lathyrus' by Reginald Crundall Punnett | [October 1927] |
| NLB/51 | New Letter Book volume 51, copy letters sent from Royal Society administration | 18 November 1914-9 July 1915 |
| NLB/58/702 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 8 June 1920 |
| NLB/55/277 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 11 February 1918 |
| NLB/68/806 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 4 November 1925 |
| NLB/55/264 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 07 February 1918 |
| NLB/59/60 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 13 July 1920 |
| NLB/59/47 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 12 July 1920 |
| NLB/58/931 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 6 July 1920 |
| NLB/59/63 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 13 July 1920 |
| NLB/55/721 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to unknown correspondent | 07 August 1918 |
| RR/20/96 | Referee's report by John Bretland Farmer, on a paper 'The ratio between spindle lengths in the spermatocyte metaphases of Helix pomatia' by C F U Meek | August 1913 |
| RR/15/28 | Referee's report by John Bretland Farmer, on a paper 'Investigation on the abnormal outgrowths or intumescences on hibuscus vitifolious, Linn: A study in experimental plant pathology' by Elizabeth Dale | 14 February 1901 |
| RR/14/44 | Referee's report by Harry Marshall Ward, on a paper 'Contributions to our knowledge of the Fucaceae: their life-history and cytology' by John Bretland Farmer and John Lloyd Williams | 21 June 1898 |
| NLB/59/766 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 10 November 1920 |
| RR/55/102 | Referee's report by John Bretland Farmer, on a paper 'The external mechanics of the chromosomes. Parts I -V' by Cyril Dean Darlington | October 1935 |
| RR/18/96 | Referee's report by John Bretland Farmer, on a paper 'On the effect of gravity upon the movements and aggregation of Euglena viridis' by Harold William Taylor Wager | October 1910 |
| NLB/61/451 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 8 July 1921 |
| RR/17/386 | Referee's report by John Bretland Farmer, on a paper 'Reproduction and early development of laminaria digitata and L. saccharina' by G H Drew | 26 April 1909 |
| NLB/64/680 | Copy letter from William Bate Hardy, Secretary of the Royal Society;to W. Dawson Esq. of the School of Forestry, Cambridge | 31 May 1923 |
| RR/48/17 | Referee's report by John Bretland Farmer, on a paper 'Meiosis in Oenothera missouriensis' by S Hedayetullah | [February 1933] |
| NLB/55/723 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to [Professor John Bretland] Farmer, FRS | 07 August 1918 |
| NLB/66/569 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to E. A. Ebblewhite Esq., F.S.A., Clerk to the Gardeners' Company, 5 Essex Court, E.C | 30 May 1924 |
| NLB/66/789 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Prof. [John Bretland] Farmer, FRS | 8 July 1924 |
| RR/55/135 | Referee's report by John Bretland Farmer, on a paper 'The cytology of trisomic mutations in a wild species of Oenothera' by Reginald Ruggles Gates and H K Nandi | March 1935 |
| NLB/65/305 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 9 October 1923 |
| NLB/57/605 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to the Clerk, Trustees of the London Parochial Charities | 15 December 1919 |
| NLB/61/580 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS; Lion Hotel, Llanymynech, Montgomeryshire | 9 August 1921 |
| NLB/55/643 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to [Professor John Bretland] Farmer, FRS | 06 July 1918 |
| NLB/55/272 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 09 February 1918 |
| NLB/67/685 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 14 February 1925 |
| NLB/57/453 | Copy letter from Sir Arthur Schuster, FRS, Secretary of the Royal Society; to Professor JB [Sir John Bretland] Farmer, FRS | 6 November 1919 |
| NLB/57/740 | Copy letter from the Secretary of the Royal Society; to Professor JB [John Bretland] Farmer, FRS | 30 January 1920 |
| NLB/57/431 | Copy letter from Sir Arthur Schuster, Secretary of the Royal Society; to the Keeper HM [His Majesty's] Privy Purse [Frederick Edward Grey Ponsonby, 1st Baron Sysonby, GCB, GCVO, PC] | 6 November 1919 |
| NLB/57/895 | Copy letter from Edwin Deller, Acting Assistant Secretary of the Royal Society; to Professor Herbert McLeod, FRS | 28 February 1920 |
| NLB/69/196 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir John [Bretland] Farmer, FRS | 26 January 1926 |
| NLB/67/83 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [Charles Edward] Walker | 17 October 1924 |
| NLB/65/420 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [Arthur Smith] Woodward, FRS; also sent to Professor [Godfrey Harold] Hardy; [Charles Thomson Rees] Wilson Esq.; [Joseph] Barcroft Esq; Dr [Frederick Frost] Blackman; Sir Frank [Watson] Dyson; [William] Bateson, Esq.; Professor [John Bretland] Farmer; Professor [Frederick Gowland] Hopkins | 30 October 1923 |
| NLB/65/931 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir John Rose Bradford, KCMG, FRS | 31 January 1924 |
| NLB/66/169 | Copy letter from [James Hopwood Jeans, Secretary of] the Royal Society; to Professor [William Ernest] Dalby, FRS | 6 March 1924 |
| NLB/57/897 | Copy letter from Edwin Deller, Acting Assistant Secretary of the Royal Society; to Professor WW [William Whitehead] Watts, FRS | 28 February 1920 |
| NLB/69/178 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [Albert Charles] Seward, FRS | 21 January 1926 |
| NLB/69/218 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [Thomas Renton] Elliott, FRS | 4 February 1926 |
| NLB/71/785 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Comptroller-General, Department of Overseas Trade, 35 Old Queen Street, SW1 | 2 November 1928 |
| NLB/66/536 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Prof. [John Bretland] Farmer, FRS | 26 May 1924 |
| NLB/68/713 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Bretland] Farmer, FRS | 20 October 1925 |
| NLB/69/826 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir John [Bretland] Farmer, FRS | 28 October 1926 |
| NLB/69/66 | Copy letter from Henry Hallett Dale, Secretary of the Royal Society; to Prof. [Vernon Herbert] Blackman, FRS | 23 December 1925 |
| NLB/69/63 | Copy letter from Henry Hallett Dale, Secretary of the Royal Society; to Sir Sidney Harmer, K.B.E., FRS | 23 December 1925 |
| NLB/73/286 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Clerk, City Parochial Foundation, 3 Temple Gardens EC4 | 2 May 1931 |
| CD/30/3 | Copy letter from Sir Archibald Geikie, Secretary of the Royal Society, to Professor [John Bretland] Farmer | 1 May 1906 |
| CD/30/17 | Copy letter from Sir Archibald Geikie, Secretary of the Royal Society, to Professor [John Bretland] Farmer | 12 May 1906 |
| CD/30/25 | Copy letter from Sir Archibald Geikie, Secretary of the Royal Society, to Professor [John Bretland] Farmer | 22 May 1906 |
| IM/Maull/001367 | Farmer, Sir John Bretland | nd |
| IM/001368 | Farmer, Sir John Bretland | nd |
| NLB/9/295 | Copy letter from Herbert Rix, to Professor John Bretland Farmer, Royal College of Science, S.W. | 26 April 1894 |
| RR/16/132 | Referee's report by John Bretland Farmer, on a paper 'The oocyte of Tomopteris' by Mr Wallace | July 1903 |
| NLB/26/647 | Copy letter from Robert William Frederick Harrison to, Professor John Bretland Farmer, Fellow of the Royal Society, Claremont House, Wimbledon Common | 5 May 1903 |
| NLB/35/425 | Copy letter from Robert William Frederick Harrison, to Alfred Daniel Hall, Rothamsted Experimental Station, Harpenden | 31 May 1907 |
| NLB/35/783 | Copy letter from Robert William Frederick Harrison, to Professor Albert Charles Seward, Fellow of the Royal Society | 16 July 1907 |
| NLB/38/75 | Copy letter from Archibald Geikie, to Professor [John Bretland] Farmer, [Fellow of the Royal Society] | 12 June 1908 |
| NLB/51/232 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Bretland Farmer FRS | 21 January 1915 |
| NLB/52/576 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor John Bretland Farmer, Chairman of the Botany Committee and FRS | 18 January 1916 |
| RR/18/11 | Referee's report by John Bretland Farmer, on a paper 'Experimental researches on vegetable assimilation and respiration. VIII - A new method for estimating the gaseous exchanges of submerged plants' by Frederick Frost Blackman and A M Smith | December 1910 |
| RR/31/15 | Referee's report by John Bretland Farmer, on a paper 'The distribution of the cytoplasmic organs in transplantable tumour cells, with special reference to dictyokinesis' by Reginald James Ludford | 4 July 1924 |
| RR/59/91 | Referee's report by John Bretland Farmer, on a paper 'Genetical and taxonomic investigations in the Genus Oenothera' by Reginald Ruggles Gates | [March 1936] |
| RR/63/117 | Referee's report by John Bretland Farmer, on a paper 'The external mechanics of the chromosomes VI—The behaviour of the centromere at meiosis' by Margaret Upcott | July 1937 |
| NLB/57/433 | Copy letter from Sir Arthur Schuster, Secretary of the Royal Society; to the Deputy Master of the Mint | [November 1919] |
| NLB/65/231 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [William] Bateson, Esq., FRS; also sent to Professor [Alfred] Fowler, Professor [Godfrey Harold] Hardy, Dr [Frederick Frost] Blackman, Professor [John Bretland] Farmer, Professor [Frederick Gowland] Hopkins, Dr [Arthur] Smith Woodward, Dr [Frank Watson] Dyson, [Charles Thomson Rees] Wilson Esq., [Joseph] Barcroft Esq. | 24 September 1923 |
| NLB/68/283 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Secretary of the Lawes Agricultural Trust; Rothamstead Experimental Station, Harpenden, Herts. | 12 June 1925 |
| NLB/66/855 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [Albert Charles] Seward, FRS | 29 July 1924 |
| NLB/68/445 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to the Comptroller General; Department of Overseas Trade, 35 Old Queen Street, S.W.1. | 13 July 1925 |
| NLB/71/565 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir William [Henry] Bragg, K.B.E, FRS [also send to Sir Henry Lyons, Sir Charles Sherrington and Sir John Farmer]. | 6 July 1928 |
| CMB/38/1 | Minutes of the Natural Products (War) Committee | 19 February 1918 |
| NLB/32/509 | Copy letter from Robert William Frederick Harrison, to Professor Walter Frank Raphael Weldon, Fellow of the Royal Society, Chairman of the Zoology Sectional Committee | 22 March 1906 |
| NLB/52/551 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor John Bertland Farmer, Chairman of the Botany Committee and FRS | 11 January 1916 |
| NLB/54 | New Letter Book volume 54, copy letters sent from Royal Society administration | 10 January 1917-2 November 1917 |
| NLB/58 | New Letter Book volume 58, copy letters sent from Royal Society administration | 28 February 1920-9 July 1920 |
| NLB/59 | New Letter Book volume 59, copy letters sent from Royal Society administration | 9 July 1920-2 December 1920 |
| NLB/61 | New Letter Book volume 61, copy letters sent from Royal Society administration | 26 April 1921-11 November 1921 |
| RR/59/41 | Referee's report by John Bretland Farmer, on five papers 'The external mechanics of the chromosomes I—The scope of enquiry', 'The external mechanics of the chromosomes II-Meiosis in diploids', 'The external mechanics of the chromosomes III-Meiosis in triploids', 'The external mechanics of the chromosomes IV—Abnormal mitosis and meiosis' and 'The External mechanics of the chromosomes V—The balance theory of mitosis' by Cyril Dean Darlington | [July 1936] |
| NLB/52 | New Letter Book volume 52, copy letters sent from Royal Society administration | 9 July 1915-8 March 1916 |
| NLB/57 | New Letter Book volume 57, copy letters sent from Royal Society administration | 27 June 1919-27 February 1920 |
| RR/16/103 | Referee's report by John Bretland Farmer, on a paper 'Cultural experiments with 'Biologic Forms' of the Erysiphaceae' by Ernest S Salmon | February 1904 |
| RR/62/65 | Referee's report by John Bretland Farmer, on a paper 'The mechanics of mitosis in the pollen-tube of Tulipa' by Margaret Upcott | [July 1936] |
| RR/14/45 | Referee's report by George Robert Milne Murray, on a paper 'Contributions to our knowledge of the Fucaceae: their life-history and cytology' by John Bretland Farmer and John Lloyd Williams | 27 June 1898 |
| RR/16/308 | Referee's report by John Bretland Farmer, on a paper 'The infection, histology and development of the uredo stage in certain uredineae' by J B P Evans | October 1905 |
| PP/13/12 | Paper, 'On Isoëtes lacustris, Linn' by John Bretland Farmer | 1889 |
| PP/19/15 | Paper, 'On the embryology of Angiopteris evecta [giant fern], Hoffm' by John Bretland Farmer | 1892 |
| RR/15/54 | Referee's report by John Bretland Farmer, on a paper 'The histology of the cell wall with special reference to the mode of connection of cells' by Arthur William Hill and Walter Gardiner | August 1900 |
| RR/16/285 | Referee's report by John Bretland Farmer, on a paper 'The growth of the oocyte in antedon: A morphological study in the cell-metabolism' by Gilbert C Chubb | February 1906 |
| RR/16/190 | Referee's report by John Bretland Farmer, on a paper 'The dual force of the dividing cell. Part I. The Achromatic Spindle Figure, elucidated by magnetic chains of force' by Marcus Hartog | 16 December 1904 |
| RR/21/162 | Referee's report by John Bretland Farmer, on the Croonian Lecture 'The bearing of cytological research on heredity' by Edmund Beecher Wilson | 15 Spetmeber 1914 |
| RR/31/53 | Referee's report by John Bretland Farmer, on a paper 'Observations on the formation of bi-nuclear cells' by [Thomas Strangeways Pigg] Strangeways | [January 1924] |
| RR/39/52 | Referee's report by John Bretland Farmer, on a paper 'The life-history, cytology and method of infection of Plasmodiophora brassicæ Woron., the cause of finger-and-toe disease of cabbages and other crucifers' by W R Ivimey Cook and E J Schwartz | [July 1929] |
| PP/22/29 | Paper, 'On the relations of the nucleus to spore-formation in certain liverworts' by John Bretland Farmer | 1893 |
| MC/19/270 | Letter from Letter from John Bretland Farmer, Board of Education, South Kensington, London, to the Secretary of the Royal Society | 19 January 1904 |
| MC/19/272 | Letter from John Bretland Farmer, Board of Education, Royal College of Science, South Kensington, London, to [Robert William Frederick] Harrison | 7 April 1904 |
| MC/19/273 | Letter from [John Bretland] Farmer, Claremont House, Wimbledon, to the Royal Society | 28 November 1904 |
| MC/19/271 | Letter from John Bretland Farmer, Board of Education, South Kensington, London, to the Assistant Secretary of the Royal Society | 17 May 1904 |
| MC/25/66 | Letter from [John Bretland] Farmer, Claremont House, Wimbledon Common, to Sir Archibald [Geikie] | 9 February 1910 |
| MC/34/66 | Letter from [John Bretland] Farmer, Green Bank Hotel, Falmouth, to Mr [Robert] Harrison, [Royal Society] | 13 March 1919 |
| MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |
| MC/22/73 | Letter from [John Bretland] Farmer, Claremont House, Wimbledon Common, to [Robert William Frederick] Harrison | 24 November 1907 |
| NLB/36/592 | Copy letter from Robert William Frederick Harrison, to Professor John Bretland Farmer, Fellow of the Royal Society | 18 November 1907 |
| MC/22/72 | Letter from [John Bretland] Farmer, Board of Education, Royal College of Science, South Kensington, London, to [Robert William Frederick] Harrison | 18 November 1907 |
| MC/34/65 | Letter from [John Bretland] Farmer, Imperial College of Science and Technology (Royal College of Science), South Kensington, London, S.W.7., to the Assistant Secretary, Royal Society | 16 January 1919 |
| MC/35 | Volume 35 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1921 |
| MC/35/54 | Letter from [John Bretland] Farmer, Imperial College of Science and Technology (Royal College of Science), South Kensington, London, to [Francis Alexander] Towle | 13 July 1921 |
| MC/26/81 | Letter from [John Bretland] Farmer, Imperial College of Science and Technology, Royal College of Science, South Kensington, London S.W, to Mr [Robert] Harrison, [Royal Society] | 16 October 1911 |
| MC/22 | Volume 22 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1907 |