| RefNo | Title | Date |
| IM/Maull/002906 | McLeod, Herbert | nd |
| IM/Maull/002904 | McLeod, Herbert | nd |
| IM/Maull/002905 | McLeod, Herbert | nd |
| NLB/4/899 | Copy letter from Herbert Rix, to Professor Herbert McLeod, Fellow of the Royal Society | 21 November 1890 |
| NLB/3/828 | Copy letter from Herbert Rix, to Professor Herbert McLeod, Fellow of the Royal Society | 18 October 1889 |
| NLB/5/782 | Copy letter from Herbert Rix, to Professor Herbert McLeod, [Fellow of the Royal Society] | 10 October 1891 |
| RR/15/247 | Referee's report by Herbert McLeod, on a paper 'A new manometer, and on the law of pressure of gases between 1.5 and 0.01 millimetres of mercury' by John William Strutt, Lord Rayleigh | February 1901 |
| RR/15/246 | Referee's report by Herbert McLeod, on a paper 'A comparative study of the spectra, densities and melting points of some groups of elements and of the relation of properties to atomic mass' by Hugh Ramage | December 1901 |
| NLB/17/415 | Copy letter from Arthur William Rucker, to Dr Edward Emanuel Klein, [Fellow of the Royal Society] | 25 October 1898 |
| NLB/19/134 | Copy letter from Robert William Frederick Harrison, to Professor Herbert McLeod, Fellow of the Royal Society | 28 June 1899 |
| NLB/22/783 | Copy letter from Robert William Frederick Harrison, to Professor [Herbert] McLeod, Fellow of the Royal Society | 17 July 1901 |
| NLB/22/667 | Copy letter from Robert William Frederick Harrison, to Professor [Herbert] McLeod, [Fellow of the Royal Society] | 24 June 1901 |
| NLB/23/1/582 | Copy letter from Robert William Frederick Harrison, to Professor Herbert McLeod, Fellow of the Royal Society | 7 December 1901 |
| NLB/31/772 | Copy letter from Robert Frederick William Harrison, to Professor Herbert McLeod, Fellow of the Royal Society | 13 November 1905 |
| NLB/33/389 | Copy letter from A H White, to Professor Herbert McLeod, Fellow of the Royal Society, S Saviour's House, College Road, Eastbourne | 22 August 1906 |
| NLB/41/128 | Copy letter from Robert William Frederick Harrison, to Professor [Herbert] McLeod, Fellow of the Royal Society | 19 October 1909 |
| NLB/42/644 | Copy letter from Robert William Frederick Harrison to Professor H [Herbert] McLeod FRS | 25 July 1910 |
| NLB/46/594 | Copy letter from Robert William Frederick Harrison, to Dr Herbert McLeod, Fellow of the Royal Society | 1 October 1912 |
| NLB/46/133 | Copy letter from Robert William Frederick Harrison, to Dr Herbert McLeod, Fellow of the Royal Society | 13 June 1912 |
| NLB/48/619 | Copy letter from Robert William Frederick Harrison, to The Library Committee (Dr Herbert McLeod, Fellow of the Royal Society, and other members of the Committee) | 11 August 1913 |
| NLB/50/561 | Copy letter from Robert William Frederick Harrison, to Dr [Henry] McLeod, Fellow of the Royal Society | 29 July 1914 |
| NLB/52/185 | Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to Sir Thomas Barlow, FRS | 7 October 1915 |
| RR/8/172 | Referee's report by James Thomson, on a paper 'On the determination of the rate of vibration of tuning-forks' by Herbert McLeod and George Sydenham Clarke | 5 November 1879 |
| NLB/58/589 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [Herbert] McLeod, FRS | 27 May 1920 |
| RR/10/370 | Referee's report by Herbert McLeod, on a paper 'Experiments on vapour-density' by E P Perman | 26 April 1890 |
| RR/11/25 | Referee's report by Herbert McLeod, on a paper 'The variations of electromotive force of cells consisting of certain metals, platinum, and nitric acid' by George James Burch and V H Velby | 14 January 1891 |
| RR/10/96 | Referee's report by Herbert McLeod, on the Bakerian Lecture 'On the dissociation of some gases by the electric discharge' by Joseph John Thomson | 24 June 1887 |
| RR/10/328 | Referee's report by Herbert McLeod, on a paper 'Photometric observations of the Sun and sky' by William Brennand | 5 January 1891 |
| RR/10/227 | Referee's report by Herbert McLeod, on a paper 'The conditions of the evolution of gases from homogeneous liquids' by Victor Herbert Veley | 27 May 1888 |
| RR/10/240 | Referee's report by Herbert McLeod, on a paper 'Combustion in dried oxygen' by Herbert Brereton Baker | 27 August 1888 |
| RR/8/171 | Referee's report by Henry Charles Fleeming Jenkin, on a paper 'On the determination of the rate of vibration of tuning-forks' by Herbert McLeod and George Sydenham Clarke | 10 Jue 1879 |
| RR/17/82 | Referee's report by Herbert McLeod, on a paper 'A new form of pressure gauge' by R J P Roberts | [August 1906] |
| NLB/57/863 | Copy letter from Edwin Deller, Acting Assistant Secretary of the Royal Society; to Dr H [Herbert ] McLeod, FRS | 25 February 1920 |
| 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/65/431 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir [Thomas] Edward Thorpe, FRS | 31 October 1923 |
| NLB/65/378 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir [Thomas] Edward Thorpe, FRS | 23 October 1923 |
| NLB/64/721 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Herbert] McLeod FRS | 8 June 1923 |
| NLB/65/562 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir [Thomas] Edward Thorpe, FRS | 21 November 1923 |
| NLB/65/386 | Copy letter from Charles [Scott] Sherrington, President of the Royal Society; to Mrs McLeod | 25 October 1923 |
| RR/15/165 | Referee's report by Herbert McLeod, on a paper 'Continuous electrical calorimetry' by Hugh Longbourne Callendar | January 1901 |
| EC/1881/15 | McLeod, Herbert: certificate of election to the Royal Society | |
| MC/13/123 | Letter from Herbert McLeod, Cooper's Hill, Staines, to Walter White, [Assistant Secretary of the Royal Society] | 30 December 1884 |
| MC/13 | Volume 13 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1884 |
| RR/16/363 | Referee's report by Herbert McLeod, on a paper 'An abstract of a paper by George Gore, FRS. 'On fluroide of silver part III'' by Mr E Prideaux | 18 April 1905 |
| MC/20 | Volume 20 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1905 |
| MC/20/157 | Letter from Herbert McLeod, The Royal Society, Burlington House, London, to the Royal Society | 26 May 1905 |
| MC/20/156 | Letter from Herbert McLeod, The Royal Society, Burlington House, London, to [Robert William Frederick] Harrison | 13 April 1905 |
| MC/20/158 | Letter from Herbert McLeod, The Royal Society, Burlington House, London, to [Robert William Frederick] Harrison | 18 October 1905 |