| Reference number | Title | Date |
| EC/1880/17 | Tilden, Sir William Augustus: certificate of election to the Royal Society | |
| IM/004606 | Tilden, Sir William Augustus | nd |
| IM/Maull/004605 | Tilden, Sir William Augustus | nd |
| MC/20/434 | Letter from [William Augustus] Tilden, Board of Education, Royal College of Science, London, South Kensington, to Robert [William Frederick] Harrison | 15 June 1905 |
| NLB/38/750 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 30 October 1908 |
| NLB/2/82 | Copy letter from Herbert Rix, to Dr William Augustus Tilden, Fellow of the Royal Society | 7 January 1888 |
| NLB/3/53 | Copy letter from Herbert Rix, to Dr William Augustus Tilden, Fellow of the Royal Society, 77 Harborne Road, Birmingham | 22 February 1889 |
| NLB/3/293 | Copy letter from Herbert Rix, to Professor William Augustus Tilden, Fellow of the Royal Society | 1 May 1889 |
| NLB/3/767 | Copy letter from Herbert Rix, to Professor William Augustus Tilden, Fellow of the Royal Society | 5 October 1889 |
| NLB/10/17 | Copy letter from Theodore E James, to Messrs Harrison & Sons | 24 August 1894 |
| NLB/8/143 | Copy letter from Theodore E James, to Professor William Augustus Tilden, Fellow of the Royal Society | 20 July 1893 |
| NLB/8/213 | Copy letter from Herbert Rix, to Professor William Augustus Tilden, Fellow of the Royal Society, The Knapp Farm, Broadway, Worcestershire | 28 July 1893 |
| NLB/8/174 | Copy letter from Herbert Rix, to Dr William Augustus Tilden, [Fellow of the Royal Society] | 24 July 1893 |
| NLB/20/303 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 16 March 1900 |
| NLB/10/229 | Copy letter from Herbert Rix, to Sir John Evans, Treasurer, Royal Society | 26 October 1894 |
| NLB/10/237 | Copy letter from Herbert Rix, to Professor William Augustus Tilden, Fellow of the Royal Society, 9 Ladbrooke Gardens, Notting Hill, W. | 29 October 1894 |
| NLB/8/921 | Copy letter from Herbert Rix, to Professor William Augustus Tilden, Fellow of the Royal Society | 23 January 1894 |
| NLB/12/300 | Copy letter from an unknown correspondent, to Mr Collings | 25 January 1896 |
| NLB/12/713 | Copy letter from Herbert Rix, to Professor William Augustus Tilden, Fellow of the Royal Society | 17 April 1896 |
| RR/15/391 | Referee's report by Robert Bellamy Clifton, on a paper 'The specific heats of metals and the relation of specific heat to atomic weight. Part II.' by William Augustus Tilden | December 1902 |
| RR/15/115 | Referee's report by Hugh Longbourne Callendar, on the Bakerian Lecture 'The specific heat of metals and the relation of specific heat to atomic weight. (with an addendum by Prof. Perry)' by Professor William Augustus Tilden | February 1900 |
| RR/15/286 | Referee's report by William Augustus Tilden, on a paper 'The electrical conductivity of air and salt vapours' by Harold Albert Wilson | 26 March 1901 |
| RR/15/272 | Letter from William Augustus Tilden, on a paper 'Some physical properties of nitric acid solutions' by Victor Herbert Veley and J J Manley to Robert Frederick William Harrison, Assistant Secretary of the Royal Society | July 1901 |
| RR/15/271 | Letter from William Augustus Tilden, on a paper 'Some physical properties of nitric acid solutions' by Victor Herbert Veley and J J Manley to Robert Frederick William Harrison, Assistant Secretary of the Royal Society | 21 July 1901 |
| RR/15/266 | Referee's report by William Augustus Tilden, on a paper 'Some physical properties of nitric acid solutions' by Victor Herbert Veley and J J Manley | 2 March 1901 |
| RR/15/392 | Referee's report by Joseph Larmor, on a paper 'The specific heats of metals and the relation of specific heat to atomic weight. Part II.' by William Augustus Tilden | December 1902 |
| RR/15/269 | Letter from William Augustus Tilden, on a paper 'Some physical properties of nitric acid solutions' by Victor Herbert Veley and J J Manley to Arthur William Rucker | 18 May 1901 |
| NLB/52/419 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor Edward Bagnall Poulton, FRS | 6 December 1915 |
| RR/16/234 | Referee's report by John Joly, on a paper 'The specific heats of metals and the relation of specific heat to atomic weight. Part III.' by William Augustus Tilden | March 1904 |
| RR/17/21 | Referee's report by William Augustus Tilden, on a paper 'On the refractive indices of gaseous potassium, zinc, cadmium, mercury, arsenic, selenium and tellurium' by Clive Cuthbertson and E Parr Metcalfe | 5 December 1906 |
| RR/16/233 | Referee's report by Joseph Larmor, on a paper 'The specific heats of metals and the relation of specific heat to atomic weight. Part III.' by William Augustus Tilden | March 1904 |
| RR/16/290 | Referee's report by William Augustus Tilden, on a paper 'The refractive index of gaseous fluorine' by Clive Cuthbertson and E B R Prideaux | 21 June 1905 |
| RR/19/56 | Referee's report by William Augustus Tilden, on a paper 'On the variation with temperature of the rate of a chemical change' by Augustus George Vernon Harcourt | 25 May 1912 |
| NLB/15/739 | Copy letter from Arthur William Rucker, to Richard Tetley Glazebrook, [Fellow of the Royal Society] | 29 November 1897 |
| NLB/17/484 | Copy letter from Arthur William Rucker, to Richard Tetley Glazebrook, [Fellow of the Royal Society] | 24[?] October 1898 |
| NLB/19/659 | Copy letter from Robert William Frederick Harrison, to Professor George Carey Foster, Fellow of the Royal Society | 20 November 1899 |
| NLB/20/331 | Copy letter from Robert William Frederick Harrison, to Mr William Augustus Tilden, Fellow of the Royal Society | 23 March 1900 |
| NLB/20/69 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 25 January 1900 |
| NLB/19/609 | Copy letter from Robert William Frederick Harrison, to Professor George Carey Foster, Fellow of the Royal Society | 9 November 1899 |
| NLB/23/2/290 | Copy letter from Joseph Larmor, to Professor William Augustus Tilden, Fellow of the Royal Society | 23 January 1903 |
| NLB/21/25 | Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons | [17 July 1900] |
| NLB/20/163 | Copy letter from Arthur William Rucker, to Professor William Augutus Tilden, Fellow of the Royal Society | 16 February 1900 |
| NLB/20/135 | Copy letter from Robert William Frederick Harrison, to Professor George Carey Foster, Fellow of the Royal Society | 10 February 1900 |
| NLB/22/105 | Copy letter from [Theodore E] James, to Professor [William Augustus] Tilden, Fellow of the Royal Society | 4 March 1901 |
| NLB/22/202 | Copy letter from Robert William Frederick Harrison, to Professor [William Augustus] Tilden, Fellow of the Royal Society | 22 March 1901 |
| NLB/22/449 | Copy letter from Arthur [William] Rucker, to Professor [William Augustus] Tilden | 16 May 1901 |
| NLB/23/1/40 | Copy letter from Theodore E James, to Professor William Augustus Tilden, Fellow of the Royal Society | 26 August 1901 |
| NLB/23/1/50 | Copy letter from Theodore E James, to Professor William Augustus Tilden, Fellow of the Royal Society | 30 August 1901 |
| NLB/22/806 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 19 July 1901 |
| NLB/23/2/467 | Copy letter from Joseph Larmor, to Professor William Augustus Tilden, Fellow of the Royal Society | 5 May 1904 |
| NLB/26/302 | Copy letter from Robert William Frederick Harrison to, William Augustus Tilden, Fellow of the Royal Society | 26 February 1903 |
| NLB/25/755 | Copy letter from Robert William Frederick Harrison, to William Augustus Tilden, Fellow of the Royal Society | 19 December 1902 |
| NLB/29/3 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 14 June 1904 |
| NLB/30/174 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society, The Oaks, Northwood, Middlesex | 8 February 1905 |
| NLB/30/813 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 26 May 1905 |
| NLB/28/555 | Copy letter from Robert William Frederick Harrison, to Professor Hugh Longbourne Callendar, Fellow of the Royal Society, Chairman of the Physics and Chemistry Committee | 29 March 1904 |
| NLB/31/57 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 16 June 1905 |
| NLB/31/119 | Copy letter from Robert William Frederick Harrison, to to Professor William Augutus Tilden, Fellow of the Royal Society | 26 June 1905 |
| NLB/31/450 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 21 September 1905 |
| NLB/31/524 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 5 October 1905 |
| NLB/32/86 | Copy letter from Robert William Frederick Harrison, to the President, International Congress of Applied Chemistry, Via Panisperna 89, Rome | 21 December 1905 |
| NLB/31/609 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 18 October 1905 |
| NLB/33/455 | Copy letter from Theodore E James, to Professor William Augustus Tilden, Fellow of the Royal Society | 4 September 1906 |
| NLB/33/425 | Copy letter from Robert William Frederick Harrison, to Professor Wiliam Augustus Tilden, Fellow of the Royal Society | 29 August 1906 |
| NLB/33/664 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 17 October 1906 |
| NLB/38/39 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 4 June 1908 |
| NLB/36/476 | Copy letter from Robert William Frederick Harrison, to William Augustus Tilden, Fellow of the Royal Society | 1 November 1907 |
| NLB/34/744 | Copy letter from Robert William Frederick Harrison, to Professor Edward Bagnall Poulton, Fellow of the Royal Society | 5 March 1907 |
| NLB/36/362 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 18 October 1907 |
| NLB/37/284 | Copy letter from Robert William Frederick Harrison to Professor W [William] A [Augustus] Tilden, Fellow of the Royal Society | 25 February 1908 |
| NLB/38/762 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 2 November 1908 |
| NLB/38/741 | Copy letter from Joseph Larmor, to Professor William Augustus Tilden, Fellow of the Royal Society | 29 October 1908 |
| NLB/40/540 | Copy letter from Robert William Frederick Harrison to Professor W [William] A [Augustus] Tilden FRS | 23 June 1909 |
| NLB/41/91 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 13 October 1909 |
| NLB/48/101 | Copy letter from Robert William Frederick Harrison, to Sir William [Augustus] Tilden, [Fellow of the Royal Society] | 19 May 1913 |
| NLB/47/672 | Copy letter from Robert William Frederick Harrison to Sir William Tilden KCB, FRS | 11 March 1913 |
| MC/20/435 | Letter from [William Augustus] Tilden, Board of Education, Royal College of Science, London, South Kensington, to Robert [William Frederick] Harrison | 20 June 1905 |
| NLB/50/259 | Copy letter from [unknown correspondent], to Sir [William Augustus] Tilden, Fellow of the Royal Society | 5 June 1914 |
| NLB/51/607 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Sir William Tilden FRS | 5 May 1915 |
| NLB/52/421 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir William Augustus Tilden, FRS | 6 December 1915 |
| NLB/52/636 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor Edward Bagnall Poulton, FRS | 2 February 1916 |
| RR/20/57 | Referee's report by William Augustus Tilden, on a paper 'The capacity for heat of metals at low temperatures' by Ernest Howard Griffiths | 28 April 1913 |
| NLB/52/600 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir William Augustus Tilden, FRS | 27 January 1916 |
| RR/18/191 | Referee's report by William Augustus Tilden, on a paper 'The atomic weight of radium' by Robert Whytlaw-Gray and William Ramsay | 6 January 1912 |
| NLB/54/599 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to K. B. C. Bennett Esquire | 2 July 1917 |
| NLB/56/811 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir William [Augustus] Tilden, FRS | 2 June 1919 |
| NLB/56/425 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Joseph [John] Thomson, President of the Royal Society | 10 February 1919 |
| RR/9/241 | Referee's report by James Dewar, on a paper 'On the solubility of salts in water at high temperatures' by William Augustus Tilden and William Ashwell Shenstone | 10 May 1884 |
| RR/9/242 | Referee's report by Thomas Edward Thorpe, on a paper 'On the solubility of salts in water at high temperatures' by William Augustus Tilden and William Ashwell Shenstone | 15 January 1884 |
| RR/14/221 | Referee's report by William Augustus Tilden, on a paper 'Vapour-density of bromine at high temperatures' by E P Perman and G A S Atkinson | 18 November 1899 |
| NLB/56/754 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir William [Augustus] Tilden, FRS | 19 May 1919 |
| NLB/58/159 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Sir William [Augustus] Tilden, FRS | 22 March 1920 |
| NLB/58/419 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Sir William [Augustus] Tilden, FRS | 4 May 1920 |
| NLB/58/508 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Sir William [Augustus] Tilden, FRS | 14 May 1920 |
| RR/12/32 | Referee's report by William Augustus Tilden, on a paper 'On the composition of water by volume' by Alexander Scott | 22 March 1893 |
| RR/14/182 | Referee's report by William Augustus Tilden, on a paper 'On the action of heat on the absorption-spectra an chemical constitution of saline substances. Part III' by Walter Noel Hartley | 7 November 1899 |
| NLB/57/142 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir William Tilden, FRS | 29 July 1919 |
| RR/13/286 | Referee's report by William Augustus Tilden, on a paper 'The electric conductivity of nitric acid' by Victor Herbert Veley and [John Job] Manley | 28 November 1897 |
| RR/13/288 | Letter from George Carey Foster, on a paper 'The electric conductivity of nitric acid' by Victor Herbert Veley and [John Job] Manley to Richard Tetley Glazebrook | 26 December 1897 |
| RR/14/180 | Referee's report by William Augustus Tilden, on a paper 'On the action of heat on the absorption-spectra an chemical constitution of saline substances' by Walter Noel Hartley | 21 October 1899 |
| RR/13/290 | Second referee's report by George Carey Foster, on a paper 'The electric conductivity of nitric acid' by Victor Herbert Veley and [John Job] Manley | 8 January 1898 |
| RR/15/116 | Referee's report by Michael James Stewart Dewar, on the Bakerian Lecture 'The specific heat of metals and the relation of specific heat to atomic weight. (with an addendum by Prof. Perry)' by Professor William Augustus Tilden | March 1900 |
| NLB/57/95 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Mrs Cowland; 17 Arundel Gardens, W | 18 July 1919 |
| NLB/55/530 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir William [Augustus] Tilden, FRS | 17 May 1918 |
| NLB/63/34 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir William [Augustus] Tilden, FRS | 16 June 1922 |
| NLB/65/365 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir William [Augustus] Tilden, FRS | 19 October 1923 |
| NLB/55/853 | Copy letter from [Dr.] Arthur Schuster, Secretary of the Royal Society; to Sir William [Augustus] Tilden, FRS | 16 October 1918 |
| NLB/63/444 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir William Tilden, FRS, The Oaks, Northwood, Middlesex | 14 October 1922 |
| NLB/65/357 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to H. S. Wright Esq.; Charterhouse, E.C.1. | 19 October 1923 |
| RR/10/206 | Referee's report by William Augustus Tilden, on a paper 'An investigation of a case of gradual chemical change' by W H Pendlebury and Margaret Seward | 14 January 1889 |
| RR/11/37 | Referee's report by William Augustus Tilden, on a paper 'Constitution of the terpenes camphors and camphor acid' by John Norman Collie | 19 November 1891 |
| MC/20/430 | Letter from [William Augustus] Tilden, Board of Education, Royal College of Science, London, South Kensington, to [Joseph] Larmor | 13 May 1905 |
| RR/17/86 | Referee's report by William Augustus Tilden, on two papers 'The evolution of nitric oxide in the decomposition of guncotton' and 'The estimation of small quantities of nitric peroxide' by R Robertson and S Napper | 28 July 1906 |
| NLB/19/548 | Copy letter from Robert William Frederick Harrison, to Professor George Carey Foster, Fellow of the Royal Society | 28 October 1899 |
| NLB/25/691 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 10 December 1902 |
| NLB/47/689 | Copy letter from Robert William Frederick Harrison to Sir William Tilden FRS | 14 March 1913 |
| RR/14/277 | Referee's report by William Augustus Tilden, on a paper 'On the electrical conductivity of flames containing salt vapours' by Harold Albert Wilson | nd [March 1899] |
| RR/12/106 | Referee's report by William Augustus Tilden, on a paper 'Chemical analysis of the meteoric stone found at Makariwa, near Invercargill, New Zealand, in the year 1886' by Lazarus Fletcher | 26 January 1894 |
| MC/20/432 | Letter from [William Augustus] Tilden, Board of Education, Royal College of Science, London, South Kensington, to [Joseph] Larmor | 22 May 1905 |
| NLB/57 | New Letter Book volume 57, copy letters sent from Royal Society administration | 27 June 1919-27 February 1920 |
| RR/11/275 | Letter from William Augustus Tilden, on a paper 'On the metallurgy of lead' by J H Hannay to the Secretary of the Royal Society | 15 July 1893 |
| RR/14/19 | Letter from William Augustus Tilden, to Richard Tetley Glazebrook, regarding a paper 'The pharmacology of aconitine, diacetyl-aconitine, benzaconine, and aconine, considered in relation to their chemical constitution' by John Theodore Cash and Wyndham Rowland Dunstan | 20 January 1898 |
| RR/14/93 | Referee's report by William Augustus Tilden, on a paper 'The electrical conductivity and luminosity of flames containing vaporised salts' by Arthur Smithells, Harry Medforth Dawson and Harold Albert Wilson | 21 November 1898 |
| RR/15/3 | Referee's report by William Augustus Tilden, on a paper 'The thermo-chemistry of the alloys of copper and zinc' by T J Baker | 12 December 1900 |
| AP/74/5 | Unpublished paper, 'The thermal expansion of pure nickel and cobalt' by A E [Alfred Edwin Howard] Tutton | 1899 |
| PP/6/31 | Paper, 'On the solubility of calcium sulphate in water in the presence of chlorides' by William A [Augustus] Tilden and W A [William Ashwell] Shenstone | 1885 |
| PP/6/31/2 | Diagrams, experimental equipment and results by William A [Augustus] Tilden and W A [William Ashwell] Shenstone | 1885 |
| PP/6/37 | Paper, 'On the influence of temperature on the heat of dissolution of salts in water' by William A [Augustus] Tilden | 1885 |
| PP/6/37/1 | Manuscript, 'On the influence of temperature on the heat of dissolution of salts in water' by William A [Augustus] Tilden | 1885 |
| PP/6/37/2 | Diagram, 'Observed and calculated numbers for potassium sulphate and nitrate and sodium nitrate' by William A [Augustus] Tilden | 1885 |
| PP/6/31/1 | Manuscript, 'On the solubility of calcium sulphate in water in the presence of chlorides' by William A [Augustus] Tilden and W A [William Ashwell] Shenstone | 1885 |
| RR/15/107 | Referee's report by William Augustus Tilden, on a paper 'Argon and its companions' by William Ramsay and Morris William Travers | 29 November 1900 |
| RR/11/36 | Letter from William Augustus Tilden, on a paper 'Constitution of the terpenes camphors and camphor acid' by John Norman Collie to John William Strutt, Lord Rayleigh, Secretary of the Royal Society | 19 November 1891 |
| RR/11/276 | Letter from William Augustus Tilden, on a paper 'On the metallurgy of lead' by J H Hannay to the Secretary of the Royal Society | 28 July 1893 |
| RR/13/287 | Letter from William Augustus Tilden, on a paper 'The electric conductivity of nitric acid' by Victor Herbert Veley and [John Job] Manley to Richard Tetley Glazebrook | 4 December 1897 |
| RR/19/8 | Referee's report by William Augustus Tilden, on a paper 'Studies on the processes operative in solutions (XXX) and on enzyme action (XX).—The nature of enzymes and of their action as hydrolytic agents' by Henry Edward Armstrong and Edward Frankland Armstrong | 18 October 1912 |
| MC/23/91 | Letter from HS Wright, Charterhouse, London, to [Robert] Harrison, The Royal Society | 5 November 1908 |
| MC/23/275 | Letter from [Margaret Ethel] MacDonald, 3 Lincolns Inn Fields, London, W. C, to Dr [Joseph] Larmor, [Royal Society] | 11 February 1908 |
| MC/23/460 | Letter from [Thomas Edward]Thorpe, Government Laboratory, London, WC, to Mr [Robert] Harrison, [Royal Society] | 27 July 1908 |
| MC/23/462 | Letter from William [Augustus] Tilden, The Oaks, Northwood, [Middlesex], to [Robert] Harrison, [Royal Society] | 28 September 1908 |
| NLB/38/703 | Copy letter from Robert William Frederick Harrison, to Professor William Augustus Tilden, Fellow of the Royal Society | 23 October 1908 |
| MC/23/463 | Letter from William [Augustus] Tilden, The Oaks, Northwood, [Middlesex], to [Robert] Harrison, [Royal Society] | 25 October 1908 |
| MC/23 | Volume 23 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1908 |
| MC/21 | Volume 21 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1906 |
| MC/20/431 | Letter from [William Augustus] Tilden, Board of Education, Royal College of Science, London, South Kensington, to Sir William Huggins, President of the Royal Society | 13 May 1905 |
| MC/20/433 | Letter from [William Augustus] Tilden, Board of Education, Royal College of Science, London, South Kensington, to [Robert William Frederick] Harrison | 2 June 1905 |
| MC/20 | Volume 20 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1905 |
| MC/20/437 | Memorandum to [William Augustus] Tilden | 7 July 1905 |
| MC/31/49 | Letter from [Professor Percy Faraday] Frankland, The University, Birmingham, Chemical Laboratories, to [Robert] Harrison, [Royal Society] | 20 February 1916 |
| MC/21/620 | Letter from William [Augustus] Tilden, Royal College of Science, London, South Kensington, to [Robert William Frederick] Harrison | 13 January [1906] |
| MC/31/151 | Letter from [Edward Bagnall] Poulton, Wykeham House, Oxford, to Mr [Robert] Harrison, [Royal Society] | 22 October 1916 |
| MC/31/215 | Letter from William [Augustus] Tilden, The Oaks, [Middlesex], to The Secretaries of the Royal Society | 25 November 1916 |
| MC/31/216 | Letter from William [Augustus] Tilden, The Oaks, [Middlesex], to The Secretaries of the Royal Society | 28 November 1916 |
| MC/32/261 | Letter from William [Augustus] Tilden, The Oaks, Northwood, [Middlesex], to The Secretaries, Royal Society | 17 December 1917 |
| NLB/55/147 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir William Tilden, FRS | 19 December 1917 |
| MC/35 | Volume 35 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1921 |
| MC/34/179 | Letter from [William Augustus] Tilden, The Oaks, Northwood, Middx, to [Robert] Harrison, [Royal Society] | 30 July 1919 |
| MC/35/159 | Letter from William [Augustus] Tilden, The Oaks, Northwood, Middlesex, to the Chairman of the Sorby Research Fellowship Committee | 12 June 1921 |