| Reference number | Title | Date |
| EC/1868/14 | Harcourt, Augustus George Vernon: certificate of election to the Royal Society | |
| IM/Maull/001933 | Harcourt, Augustus George Vernon | nd |
| IM/001935 | Harcourt, Augustus George Vernon | nd |
| NLB/11/955 | Copy letter from Herbert Rix, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 8 November 1895 |
| NLB/4/138 | Copy letter from Herbert Rix, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 21 February 1890 |
| NLB/4/50 | Copy letter from Herbert Rix, to Augusts George Vernon Harcourt, Fellow of the Royal Society | 28 January 1890 |
| NLB/4/155 | Copy letter from Herbert Rix, to Augustus Vernon-Harcourt, Fellow of the Royal Society | 26 February 1890 |
| NLB/5/32 | Copy letter from Herbert Rix, to Augustus Vernon Harcourt, Fellow of the Royal Society | 19 February 1891 |
| NLB/11/762 | Copy letter from Herbert Rix, to Messrs Harrison & Sons | 1 October 1895 |
| NLB/8/1032 | Copy letter from Herbert Rix, to Augustus Vernon Harcourt, Fellow of the Royal Society, Cowley Grange, Oxford | 13 February 1894 |
| NLB/10/973 | Copy letter from Michael Foster, to Augustus George Vernon Harcourt | 15 March 1895 |
| NLB/11/140 | Copy letter from Herbert Rix, to the Editor of 'Nature', 29 Bedford Street, Strand | [April 1895] |
| NLB/23/1/111 | Copy letter from A H White, to Professor Augustus George Vernon Harcourt, Fellow of the Royal Society | 24 September 1901 |
| NLB/11/216 | Copy letter from Herbert Rix, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 15 May 1895 |
| NLB/11/260 | Copy letter from Herbert Rix, to Mr Collings | [May 1895] |
| NLB/11/378 | Copy letter from Herbert Rix, to Mr Collings | 18 June 1895 |
| NLB/12/525 | Copy letter from Herbert Rix, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 6 March 1896 |
| 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 |
| RR/16/91 | Referee's report by Augustus George Vernon Harcourt, on a paper 'The evaporation of water in a current of air' by Edgar Philip Perman | April 1903 |
| NLB/24/415 | Copy letter from Robert William Frederick Harrison, to [Augustus George] Vernon Harcourt, Fellow of the Royal Society | 12 May 1902 |
| NLB/23/1/460 | Copy letter from Robert William Frederick Harrison, to Augustus George Vernon Harcourt, Fellow of the Royal Society, Cowley Grange, Oxford | 15 November 1901 |
| NLB/25/293 | Copy letter from Robert William Frederick Harrison, to Augustus George Vernon Harcout, Fellow of the Royal Society, St Clare, Ryde, Isle of Wight | 11 October 1902 |
| NLB/24/593 | Copy letter from Theodore E James, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 6 June [1902] |
| NLB/24/631 | Copy letter from Robert William Frederick Harrison, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 10 June 1902 |
| NLB/24/756 | Copy letter from Robert William Frederick Harrison, to Augustus Vernon Harcourt, Fellow of the Royal Society | 4 July 1902 |
| NLB/24/619 | Copy letter from Theodore E James, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 9 June 1902 |
| NLB/25/690 | Copy letter from Robert William Frederick Harrison, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 10 December 1902 |
| RR/19/55 | Referee's report by Jospeh Larmor, on a paper 'On the variation with temperature of the rate of a chemical change' by Augustus George Vernon Harcourt | [May 1912] |
| NLB/28/161 | Copy letter from Robert William Frederick Harrison, to Augustus Vernon Harcourt, Fellow of the Royal Society | 22 January 1904 |
| NLB/27/307 | Copy letter from Robert William Frederick Harrison, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 4 August 1903 |
| NLB/27/442 | Copy letter from Robert William Frederick Harrison, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 25 September 1903 |
| NLB/28/112 | Copy letter from Robert William Frederick Harrison, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 12 January 1904 |
| NLB/28/159 | Copy letter from Joseph Larmor, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 21 January 1904 |
| NLB/23/1/480 | Copy letter from Robert William Frederick Harrison, to Augustus George Vernon Harcourt, Fellow of the Royal Society, Cowley Grange, Oxford | 18 November 1901 |
| NLB/28/215 | Copy letter from Joseph Larmor, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 30 January 1904 |
| NLB/46/55 | Copy letter from Joseph Larmor, to Augustus Vernon Harcourt, Fellow of the Royal Society | 5 June 1912 |
| RR/7/97 | Referee's report by Augustus George Vernon Harcourt, on a paper 'On a law in chemical dynamics' by John Hall Gladstone and Alfred Tribe | 25 October 1871 |
| NLB/54/11 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Augustus George Vernon] Harcourt, FRS | 19 January 1917 |
| NLB/57/381 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor HB [Harold Baily] Dixon, FRS, CBE, | 29 October 1919 |
| RR/7/113 | Referee's report by Augustus George Vernon Harcourt, on a paper 'On the chemical activity of nitrates' by Edmund James Mills | 1871 |
| RR/9/72 | Referee's report by Augustus George Vernon Harcourt, on a paper 'Researches on chemical equivalence. Part IV and V' by Edmund James Mills | 31 December 1882 |
| RR/9/178 | Third referee's report by Augustus George Vernon Harcourt, on a paper 'On a new standard of illumination and the measurement of light' by William Henry Preece | 18 July 1883 |
| RR/9/177 | Second referee's report by Augustus George Vernon Harcourt, on a paper 'On a new standard of illumination and the measurement of light' by William Henry Preece | 10 July 1883 |
| RR/10/351 | Referee's report by William Pole, on a paper 'Investigations into the effects of training walls in an estuary like the Mersey' by Augustus George Vernon Harcourt | 8 February 1890 |
| RR/12/324 | Referee's report by George Downing Liveing, on the Bakerian Lecture 'On the laws connexion between the conditions of a chemical change and its amount.—III. Further researches on the reaction of hydrogen dioxide and hydrogen iodide' by Augustus George Vernon Harcourt and William Esson | 10 April 1895 |
| RR/14/224 | Referee's report by Augustus George Vernon Harcourt, on a paper 'An experimental research on some standards of light' by Joseph Ernest Petavel | nd [October 1899] |
| NLB/55/594 | Copy letter from [Joseph John] Thomson, President of the Royal Society; to Dr. [Augustus George] Vernon Harcourt, FRS | 21 June 1918 |
| RR/9/201 | Referee's report by Augustus George Vernon Harcourt, on a paper 'Conditions of chemical change in gases: hydrogen, carbonic oxide, and oxygen' by Harold Baily Dixon | 29 July 1884 |
| NLB/57/428 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to unknown correspondent | 7 November 1919 |
| MS/373/1/52 | Letter from Augustus Vernon Harcourt and others, Oxford, to the Editor of the Chemical News | 1 July 1908 |
| MC/7/273 | Letter from A [Augustus] Vernon Harcourt, Christ Church, to Walter White, Assistant Secretary of the Royal Society | 4 November 1865 |
| IM/Maull/001934 | Harcourt, Augustus George Vernon | nd |
| NLB/2/904 | Copy letter from Herbert Rix, to Professor Michael Foster, [Royal Society] | 14 December 1888 |
| NLB/11/342 | Copy letter from Herbert Rix, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 7 June 1895 |
| NLB/23/1/555 | Copy letter from Arthur William Rucker, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 2 December 1901 |
| RR/9/322 | Referee's report by Augustus George Vernon Harcourt, on the Bakerian Lecture 'Colour photometry' by William de Wivelesile Abney and Edward Robert Festing | 12 April 1886 |
| RR/12/325 | Referee's report by Arthur Schuster, on the Bakerian Lecture 'On the laws connexion between the conditions of a chemical change and its amount.—III. Further researches on the reaction of hydrogen dioxide and hydrogen iodide' by Augustus George Vernon Harcourt and William Esson | 19 May 1895 |
| NLB/28/180 | Copy letter from Joseph Larmor, to Augustus George Vernon Harcourt, Fellow of the Royal Society | 26 January 1904 |
| RR/7/182 | Referee's report by Augustus George Vernon Harcourt, on a paper 'On some properties of anhydrous liquefied ammonia' by George Gore | 6 September 1872 |
| RR/9/176 | Referee's report by Augustus George Vernon Harcourt, on a paper 'On a new standard of illumination and the measurement of light' by William Henry Preece | 9 July 1883 |
| RR/12/327 | Letter from William Esson, to John William Strutt, Lord Rayleigh, regarding the Bakerian Lecture 'On the laws connexion between the conditions of a chemical change and its amount.—III. Further researches on the reaction of hydrogen dioxide and hydrogen iodide' by Augustus George Vernon Harcourt and William Esson | 24 June 1895 |
| PP/13/23/1 | Manuscript, 'An investigation of a case of gradual chemical change' by W H Pendlebury and Margaret Seward | 1888 |
| MC/7 | Volume 7 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1864-1866 |
| RR/6/139 | Referee's report by John Hall Gladstone, on a paper 'On the laws of connexion between the conditions of a chemical change and its amount' by Augustus George Vernon Harcourt and William Esson | 31 January 1866 |
| MC/8/444 | Letter from A [Augustus] Vernon Harcourt, Honorary Secretary of the Chemical Society, Christ Church, Oxford, to the Secretary of the Royal Society | 8 November 1869 |
| MC/8 | Volume 8 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1867-1869 |
| AP/66/28 | Unpublished paper, 'Investigations into the effects of training walls in an estuary like the Mersey' by Leveson Francis Vernon-Harcourt | 1890 |
| AP/68/7 | Unpublished paper, 'Stellar photometry' by W J Dibdin | 1892 |
| PP/15/7 | Paper, 'Some observations on the amount of luminous and non-luminous radiation emitted by a gas flame' by John Conroy | 1889 |
| PP/13/23 | Paper, 'An investigation of a case of gradual chemical change' by W H Pendlebury and Margaret Seward | 1888 |
| AP/66/28/1 | Unpublished manuscript, 'Investigations into the effects of training walls in an estuary like the Mersey' by Leveson Francis Vernon-Harcourt | 1890 |
| PP/13/32/1 | Manuscript, 'The principles of training rivers through tidal estuaries, as illustrated by investigations into the methods of improving the navigation channels of the estuary of the Seine [France]' by Leveson Francis Vernon-Harcourt | 1889 |
| PP/13/32 | Paper, 'The principles of training rivers through tidal estuaries, as illustrated by investigations into the methods of improving the navigation channels of the estuary of the Seine [France]' by Leveson Francis Vernon-Harcourt | 1889 |
| RR/6/140 | Referee's report by George Gabriel Stokes, on a paper 'On the laws of connexion between the conditions of a chemical change and its amount' by Augustus George Vernon Harcourt and William Esson | 27 September 1866 |
| RR/12/326 | Letter from Augustus George Vernon Harcourt, to John William Strutt, 3rd Baron Rayleigh, regarding the Bakerian Lecture 'On the laws connexion between the conditions of a chemical change and its amount.—III. Further researches on the reaction of hydrogen dioxide and hydrogen iodide' by Augustus George Vernon Harcourt and William Esson | 23 June 1895 |
| AP/68/7/1 | Unpublished manuscript, 'Stellar photometry' by W J Dibdin | 1892 |
| MC/15 | Volume 15 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1889-1892 |
| MC/19/384 | Letter from [Augustus George] Vernon Harcout, St Clare, Ryde, to the Assistant Secretary of the Royal Society | 13 January 1904 |
| MC/27/157 | Letter from [Augustus George Vernon] Harcourt, St Clare, Ryde, Isle of Wight, to [Joseph] Larmor, [Royal Society] | 12 April 1912 |
| MC/27/156 | Letter from [Augustus] Vernon Harcourt, Runton Hill, West Runton, Norfolk, to [Joseph] Larmor, [Royal Society] | 30 April 1912 |
| MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |
| MC/22/103 | Letter from [Augustus] Vernon Harcourt, St Clare, Ryde, Isle of Wight, to [Joseph] Larmor | 2 January 1907 |
| MC/22 | Volume 22 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1907 |
| MC/34/49 | Letter from [Harold Baily] Dixon, The University, Manchester, to [Robert] Harrison, [Royal Society] | 31 October 1919 |