| RefNo | Title | Date |
| NLB/63/233 | Copy letter from William Bate Hardy, Secretary of the Royal Society and FRS; to Sir Walter Fletcher, FRS | 20 July 1922 |
| IM/001450 | Fletcher, Sir Walter Morley | nd |
| CD/19/36 | Copy letter from William Bate Hardy, Secretary of the Royal Society, to Sir Walter Fletcher | 10 November 1923 |
| NLB/57/420 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to unknown correspondent | 4 November 1919 |
| NLB/52/467 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. Walter Morley Fletcher, FRS | 15 December 1915 |
| NLB/70/24 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Secretary of the Ministry of Health; Whitehall, S.W.1. | 3 December 1926 |
| NLB/64/645 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Walter Fletcher, FRS | 23 May 1923 |
| NLB/51/670 | Copy letter from William Bate Hardy, Acting Biological Secretary of the Royal Society to Dr Walter Morley Fletcher FRS, National Health Insurance Commission, Buckingham Gate, SW | 19 May 1915 |
| NLB/52/232 | Copy letter from Sir William Bate Hardy, Vice President of the Royal Society; to Dr. Walter Morley Fletcher, FRS | 21 October 1915 |
| NLB/52/283 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. Walter Morley Fletcher, FRS | 2 November 1915 |
| NLB/52/347 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. Walter Morley Fletcher, FRS | 11 November 1915 |
| NLB/54/294 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Walter] Morley Fletcher, FRS | 26 March 1917 |
| NLB/60/35 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 3 December 1920 |
| NLB/54/716 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Walter Morley] Fletcher, FRS | 20 August 1917 |
| NLB/54/104 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Walter Morley] Fletcher, FRS | 6 February 1917 |
| NLB/54/180 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Walter Morley] Fletcher, FRS | 26 February 1917 |
| NLB/54/844 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Walter Morley] Fletcher, FRS | 18 October 1917 |
| NLB/54/714 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Walter Morley] Fletcher, FRS | 17 August 1917 |
| NLB/56/891 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 20 June 1919 |
| NLB/56/462 | Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to Sir Walter [Morley] Fletcher, FRS | 15 February 1919 |
| NLB/59/468 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 5 October 1920 |
| NLB/56/823 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 3 June 1919 |
| NLB/58/145 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 19 March 1920 |
| NLB/58/853 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 25 June 1920 |
| CD/64/20 | Letter from Walter Morley Fletcher, Medical Research Council, 15 Buckingham Street, Strand, London, to Wiliam Bate Hardy, Secretary of the Royal Society | 21 March 1921 |
| CD/8/4 | Copy letter from William Bate Hardy, Secretary of the Royal Society, to Sir Walter Fletcher | 27 May 1920 |
| NLB/58/641 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 2 June 1920 |
| NLB/60/675 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 11 March 1921 |
| NLB/60/109 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 10 December 1920 |
| CD/64/35 | Letter from Sir William Rice Edwards, Office of Director General, Indian Medical Service, Simla, to Walter Morley Fletcher | 4 May 1922 |
| NLB/59/623 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 25 October 1920 |
| CD/64/33 | Letter from Walter Morley Fletcher, Medical Research Council, York Building, Adelphi. London, to [William Bate] Hardy | 16 May 1922 |
| NLB/60/144 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 14 December 1920 |
| NLB/60/152 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 15 December 1920 |
| NLB/60/129 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 13 December 1920 |
| NLB/57/600 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to WM How, Esq, Bailiff & Bursar of Schrewsbury [sic] School | 15 December 1919 |
| NLB/60/744 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 22 March 1921 |
| NLB/66/465 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to the Secretary, Ministry of Health, Whitehall, S.W | 16 May 1924 |
| CD/64/8 | Letter from Edwin Deller, Assistant Secretary of the Royal Society, to Sir Walter Morley Fletcher | 3 December 1920 |
| NLB/57/342 | Copy letter from Sir Arthur Schuster, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 21 October 1919 |
| NLB/57/616 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 15 December 1919 |
| NLB/57/811 | Copy letter from Sir William Bate Hardy, FRS, Secretary of the Royal Society; to [Sir Walter Morley] Fletcher, FRS | 12 February 1920 |
| NLB/62/71 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 25 November 1921 |
| NLB/57/838 | Copy letter from Sir William Bate Hardy, FRS, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS, KBE | 20 February 1920 |
| NLB/66/42 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Walter Fletcher, FRS | 12 February 1924 |
| NLB/57/132 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Walter Fletcher, FRS, KBE | 27 July 1919 |
| CD/64/37 | Letter from Walter Morley Fletcher, Medical Research Council, York Building, Adelphi, London, to [William Bate] Hardy, Secretary of the Royal Society | 15 June 1922 |
| NLB/65/447 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, KBE, FRS | 1 November 1923 |
| CD/64/21 | Letter from Walter Morley Fletcher, Medical Research Council, 15 Buckingham Street, Strand, London, to Francis Alexander Towle | 23 March 1921 |
| CD/64/36 | Letter from Walter Morley Fletcher, Medical Research Council, York Building, Adelphi, London, to [William Bate] Hardy, Secretary of the Royal Society | 22 May 1922 |
| NLB/64/795 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter Fletcher, FRS | 19 June 1923 |
| NLB/65/511 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 10 November 1923 |
| NLB/65/866 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, KBE, FRS | 19 January 1924 |
| NLB/65/344 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 18 October 1923 |
| NLB/70/22 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Secretary of the London School of Hygiene and Tropical Medicine, Malet Street, W.C.1. | 3 December 1926 |
| NLB/67/815 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter Fletcher, KBE, FRS | 14 March 1925 |
| NLB/66/481 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; Sir [Walter Morley] Fletcher, K.B.E, FRS | 16 May 1924 |
| NLB/68/214 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter Fletcher, KBE, FRS | 28 May 1925 |
| NLB/70/594 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Walter Fletcher, KBE, FRS | 30 May 1927 |
| NLB/69/937 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, K.B.E., FRS | 20 November 1926 |
| NLB/69/179 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Walter [Morley] Fletcher, K.B.E, FRS | 23 January 1926 |
| NLB/68/943 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Walter Fletcher, KBE, FRS | 4 December 1925 |
| CD/19/64 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society, to Sir Walter Fletcher | 12 February 1924 |
| NLB/58/593 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 27 May 1920 |
| IM/001449 | Fletcher, Sir Walter Morley | nd |
| RR/23/29 | Referee's report by William Maddock Bayliss, on a paper 'The respiratory process in muscle and the nature of muscular motion' by Walter Morley Fletcher and Frederick Gowland Hopkins | December 1916 |
| RR/23/28 | Referee's report by Hugh Kerr Anderson, on a paper 'The respiratory process in muscle and the nature of muscular motion' by Walter Morley Fletcher and Frederick Gowland Hopkins | December 1916 |
| NLB/59/155 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 22 July 1920 |
| NLB/57/621 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 17 December 1919 |
| NLB/69/692 | Copy letter from Sir Ernest Rutherford, President of the Royal Society; to Sir Walter [Morley] Fletcher, FRS | 23 July 1926 |
| CD/19/24 | Copy letter from William Bate Hardy, Secretary of the Royal Society, to Sir Walter Fletcher | 6 July 1923 |
| CD/64/17 | Letter from N.M. Muzumdar, Tata Sons Limited, Navsari Buildings, Fort, Bombay, to Sir Walter Morley Fletcher, Medical Research Council, 15 Buckingham Street, Strand, London | 18 February 1921 |
| EC/1915/05 | Fletcher, Sir Walter Morley: certificate of election to the Royal Society | |
| 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/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 |
| MC/17 | Volume 17 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1897-1899 |