| RefNo | Title | Date |
| IM/004202 | Simpson, Sir George Clarke | nd |
| EC/1915/13 | Simpson, Sir George Clarke: certificate of election to the Royal Society | |
| NLB/65/277 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [George Clarke] Simpson, FRS | 3 October 1923 |
| NLB/39/509 | Copy letter from Robert William Frederick Harrison to C [Charles] T [Thomson] R [Rees] Wilson, Fellow of the Royal Society | 29 January 1909 |
| RR/17/438 | Referee's report by Arthur Schuster, on a paper 'On the electricity of rain and snow' by George Clarke Simpson | January 1910 |
| RR/16/390 | Referee's report by Charles Thomson Rees Wilson, on a paper 'Atmosphere electricity in high latitudes' by George Clarke Simpson | 7 March 1905 |
| NLB/30/447 | Copy letter from Joseph Larmor, to George Clarke Simpson, [Fellow of the Royal Society] | 23 March 1905 |
| NLB/30/588 | Copy letter from Robert William Frederick Harrison, to George Clarke Simpson, Meteorological office, 68 Victoria Street, Westminster, S.W. | April 1905 |
| NLB/37/451 | Copy letter from Robert William Frederick Harrison to Dr G [George] C [Clarke] Simpson, India Meteorological Department, Simla, India | 23 March 1908 |
| NLB/39/407 | Copy letter from Robert William Frederick Harrison to Professor A [Arthur] Schuster, Fellow of the Royal Society | 19 January 1909 |
| NLB/40/210 | Copy letter from Robert William Frederick Harrison to Professor J [John] H [Henry] Poyting FRS, Chairman of the Physics and Chemistry Committee | 3 May 1909 |
| RR/17/434 | Referee's report by Charles Thomson Rees Wilson, on a paper 'On the electricity of rain and its origin in thunderstroms' by George Clarke Simpson | February 1909 |
| RR/42/42 | Referee's report by George Clarke Simpson, on a paper 'Thunder-storms and the penetrating radiation' by Basil Ferdinand Jamieson Schonland | September 1930 |
| RR/33/38 | Referee's report by George Clarke Simpson, on a paper 'Atmospheric ozone and terrestrial magnetism' by Charles Chree | 16 January 1926 |
| RR/33/111 | Referee's report by George Clarke Simpson, on a paper 'Condensation of water from the air upon hygroscopic crystals' by J S Owens | 14 December 1925 |
| RR/37/137 | Referee's report by George Clarke Simpson, on a paper 'On line-integrals of the diurnal magnetic variations' by A T Price and Sydney Chapman | March 1928 |
| NLB/61/185 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Dr. [George Clarke] Simpson, Director of the Meteorological Office and FRS | 30 May 1921 |
| NLB/60/343 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Dr. [George Clarke] Simpson, Director of the Meteorological Office and FRS | 21 January 1921 |
| RR/37/43 | Referee's report by George Clarke Simpson, on a paper 'On the theory of the Solar diurnal variation of the Earth’s magnetism' by Sydney Chapman | November 1928 |
| RR/36/65 | Referee's report by George Clarke Simpson, on a paper 'The polarity of thunderclouds' by Basil Ferdinand Jamieson Schonland | 27 November 1927 |
| RR/36/64 | Referee's report by George Clarke Simpson, on a paper 'The electric fields of South African thunderstorms' by Basil Ferdinand Jamieson Schonland and J Craib | [January 1927] |
| RR/37/44 | Referee's report by George Clarke Simpson, on a paper 'On the variability of the quiet-day diurnal magnetic variation at Eskdalemuir and Greenwich' by Sydney Chapman and J M Stagg | 10 December 1928 |
| RR/47/81 | Referee's report by George Clarke Simpson, on a paper 'The polarity of thunderclouds' by E C Halliday | 26 June 1932 |
| RR/43/16 | Referee's report by George Clarke Simpson, on a paper 'The principal constituent of the tides in the English and Irish channels' by Arthur Thomas Doodson and R H Corkan | 1931 |
| RR/39/49 | Referee's report by George Clarke Simpson, on a paper 'An upper air temperature indicator for use with pilot-balloon' by G Chatterjee | 28 September 1929 |
| RR/18/181 | Referee's report by Charles Thomson Rees Wilson, on a paper 'Atmospheric electricity over the ocean' by George Clarke Simpson and C S Wright | February 1911 |
| NLB/60/191 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [George Clarke] Simpson, FRS | 21 December 1920 |
| RR/17/437 | Referee's report by Charles Thomson Rees Wilson, on a paper 'On the electricity of rain and snow' by George Clarke Simpson | January 1910 |
| NLB/60/297 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Dr. [George Clarke] Simpson, Director of the Meteorological Office and FRS | 13 January 1921 |
| RR/46/54 | Referee's report by George Clarke Simpson, on a paper 'The reproducibility and rate of coagulation of stearic acid smokes' by Hubert Sutton Patterson and W Cawood | 30 January 1932 |
| RR/49/47 | Referee's report by George Clarke Simpson, on a paper 'The observation of gravity by means of invariable pendulums' by Edward Crisp Bullard | 26 March 1933 |
| RR/49/140 | Referee's report by George Clarke Simpson, on a paper 'Shear patterns in an unstable layer of air' by A Graham | 18 June 1933 |
| NLB/61/365 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Dr. [George Clarke] Simpson, Director of the Meteorological Office and FRS | 23 June 1921 |
| NLB/61/338 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Dr. [George Clarke] Simpson, Director of the Meteorological Office and FRS | 21 June 1921 |
| RR/36/66 | Referee's report by George Clarke Simpson, on a paper 'The interchange of electricity between thunderclouds and the Earth' by Basil Ferdinand Jamieson Schonland | 27 November 1927 |
| NLB/61/789 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; Dr. [George Clarke] Simpson, Director of the Meteorological Office and FRS | 26 October 1921 |
| NLB/61/834 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [George Clarke] Simpson, Director of the Meteorological Office and FRS | 2 November 1921 |
| RR/70/90 | Referee's report by George Clarke Simpson, on a paper 'Discharge currents associated with kite balloons' by R Davis and W G Standring | 26 March 1947 |
| RR/60/48 | Referee's report by George Clarke Simpson, on a paper 'On the temperature of the surface waters of the Irish sea' by Joseph Proudman, H Mabel Lewis and A Leslie Dennis | 4 December 1936 |
| RR/63/93 | Referee's report by Charles Thomson Rees Wilson, on a paper 'The distribution of electricity in thunderclouds' by George Clarke Simpson and F J Scrase | April 1937 |
| NLB/62/896 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Dr. [George Clarke] Simpson, Director of the Meteorological Office and FRS | 29 May 1922 |
| RR/67/389 | Referee's report by Charles Thomson Rees Wilson, on a paper 'The distribution of electricity in thunderclouds, II' by G D Robinson and George Clarke Simpson | October 1940 |
| RR/70/9 | Referee's report by George Clarke Simpson, on a paper 'Photoelectric measurements of the seasonal variations in daylight at Plymouth, from 1938 to March 1941, compared with the years 1930 to 1937' by William Ringrose Gelston Atkins and M. A. Ellison | 1947 |
| NLB/65/124 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Dr [George Clarke] Simpson, FRS | 7 August 1923 |
| RR/35/108 | Referee's report by George Clarke Simpson, on a paper 'Measurement of the biologically active ultra-violet rays of sunlight' by Leonard Erskine Hill | 7 February 1927 |
| NLB/71/830 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [George Clarke] Simpson, C.B., C.B.E., FRS | 12 November 1928 |
| NLB/65/901 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Dr [George Clarke] Simpson, FRS | 25 January 1924 |
| NLB/67/123 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Dugald Clerk, KBE, FRS; also sent to [Sydney] Chapman FRS; [Frederick George] Donnan FRS; [Francis William] Aston FRS; [George Clarke] Simpson FRS; [Henry Hallett] Dale FRS; [James Hartley] Ashworth FRS; [Frederick Frost] Blackman FRS; [John Beresford] Leathes FRS | 30 October 1924 |
| NLB/69/113 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [George Clarke] Simpson, FRS | 13 January 1926 |
| NLB/68/692 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [George Clarke] Simpson, FRS | 16 October 1925 |
| NLB/68/617 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [George Clarke] Simpson, FRS | 24 September 1925 |
| NLB/69/435 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Secretary of the Admiralty, S.W.1 | 13 April 1926 |
| NLB/70/509 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [George Clarke] Simpson, CB, FRS | 28 April 1927 |
| NLB/69/403 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [George Clarke] Simpson, FRS | 27 March 1926 |
| NLB/71/374 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [George Clarke] Simpson, C.B., FRS | 26 April 1928 |
| NLB/71/571 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [George Clarke] Simpson, FRS | 9 July 1928 |
| NLB/71/232 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [George Clarke] Simpson, FRS | 17 February 1928 |
| NLB/69/783 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [George Clarke] Simpson, C.B.E., FRS | 11 October 1926 |
| NLB/72/507 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [George Clarke] Simpson, CB, FRS | 20 November 1929 |
| NLB/72/761 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [George Clarke] Simpson, CB, FRS | 5 April 1930 |
| NLB/71/984 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [George Clarke] Simpson, C.B., FRS | 7 January 1929 |
| NLB/72/602 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [George Clarke] Simpson, CB, CBE, FRS | 16 January 1930 |
| IM/GA/WS/4708 | Simpson, Sir George Clarke | 06/08/1954 |
| RR/44/40 | Referee's report by George Clarke Simpson, on a paper 'A new apparatus for the measurement of the earth's magnetic field' by L F Bates | 9 July 1932 |
| RR/63/94 | Referee's report by Arthur Stewart Eve, on a paper 'The distribution of electricity in thunderclouds' by George Clarke Simpson and F J Scrase | April 1937 |
| RR/35/110 | Third referee's report by George Clarke Simpson, on a paper 'Measurement of the biologically active ultra-violet rays of sunlight' by Leonard Erskine Hill | 17 July 1927 |
| RR/33/55 | Referee's report by George Clarke Simpson, on a paper 'Measurements of the amount of ozone in the earth’s atmosphere and its relation to other geophysical conditions' by Gordon Miller Bourne Dobson and D N Harrison | 16 January 1926 |
| NLB/72/961 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [George Clarke] Simpson, CB, CBE, FRS | 8 August 1930 |
| NLB/65/43 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS | 17 July 1923 |
| NLB/61 | New Letter Book volume 61, copy letters sent from Royal Society administration | 26 April 1921-11 November 1921 |
| MDA/C/10/1 | Correspondence relating to payments from the Gassiot and Rosse Funds, by the Gassiot Committee | 1929-1950 |
| RR/42/84 | Referee's report by George Clarke Simpson, on a paper 'Vertical electric currents below thunderstorms and showers' by T W Wormell | 11 February 1930 |
| RR/32/52 | Referee's report by George Clarke Simpson, on a paper 'On atmospheric radio-activity and Indian weather' by D B Deodhar | 30 May 1925 |
| MC/20/386 | Letter from George [Clarke] Simpson, Meteorological Office, Victoria Street, Westminster, to the Royal Society | 18 April 1905 |
| RR/17/435 | Letter from Charles Thomson Rees Wilson, on a paper 'On the electricity of rain and its origin in thunderstroms' by George Clarke Simpson to Arthur Schuster | 9 March 1909 |
| RR/28/81 | Referee's report by George Clarke Simpson, on a paper 'Magnetic phenomena in the region of the south magnetic pole' by Charles Chree | 25 May 1923 |
| RR/32/44 | Referee's report by George Clarke Simpson, on a paper 'The lunar diurnal magnetic variation at Greenwich and other observatories' by Sydney Chapman | 23 January 1925 |
| RR/33/37 | Referee's report by George Clarke Simpson, on a paper 'A comparison of the records from British magnetic stations underground and surface' by Charles Chree and R E Watson | 23 June 1926 |
| RR/35/109 | Second referee's report by George Clarke Simpson, on a paper 'Measurement of the biologically active ultra-violet rays of sunlight' by Leonard Erskine Hill | April 1927 |
| RR/39/6 | Second referee's report by George Clarke Simpson, on a paper 'Microseisms associated with disturbed weather in the Indian seas' by Sudhansu Kumar Banerji | 26 January 1930 |
| RR/39/7 | Referee's report by George Clarke Simpson, on a paper 'Microseisms associated with disturbed weather in the Indian seas' by Sudhansu Kumar Banerji | 30 June 1929 |
| RR/61/19 | Referee's report by George Clarke Simpson, on a paper 'The photo-electric measurement of the diurnal variations in daylight in temperate and tropical regions' by William Ringrose Gelston Atkins, N G Ball and Horace H Poole | 9 April 1937 |
| RR/61/80 | Referee's report by George Clarke Simpson, on a paper 'Instability of fluids heated from below' by Krishna Chandra | 27 July 1937 |
| AP/78/6 | Paper, 'On the electricity of rain and its origin in thunderstorms' by G C [George Clarke] Simpson | 1909 |
| MC/20 | Volume 20 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1905 |
| MC/20/387 | Letter from George [Clarke] Simpson, Meteorological Office, Victoria Street, Westminster, to the Royal Society | 11 June 1905 |
| MC/20/388 | Letter from George [Clarke] Simpson, Dalton Hall, Victoria Park, Manchester, to the Royal Society | 8 December 1905 |