| RefNo | Title | Date |
| EC/1928/16 | Whytlaw-Gray, Robert: certificate of election to the Royal Society | |
| IM/004898 | Whytlaw Gray, Robert | nd |
| IM/GA/WS/1767 | Whytlaw-Gray, Robert | nd |
| 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 |
| RR/34/77 | Referee's report by Robert John Strutt, Lord Rayleigh, on a paper 'On the densities of particles in smokes' by Hubert Sutton Patterson and Robert Whyltlaw Gray | [October 1926] |
| RR/44/130 | Referee's report by Francis William Aston, on a paper 'The atomic weight of xenon' by Robert Whytlaw- Gray and Hubert Sutton Patterson | August 1931 |
| RR/28/33 | Referee's report by Charles Thomson Rees Wilson, on a paper 'Smokes: Part II.— A method of determining the size of the particles in smokes' by Robert Whytlaw-Gray and J B Speakman | [November 1922] |
| RR/72/37 | Referee's report by Cyril Norman Hinshelwood, on a paper 'A comparison of the compressibilities of some gases with that of nitrogen at pressures below one atmosphere' by G A Bottomley, Doreen S Massie and Robert Whytlaw- Gray | 1949 |
| RR/49/75 | Referee's report by David Leonard Chapman, on a paper 'The volume coefficients of expansion of several gases at pressures below one metre' by J B M Coppock and Robert Whytlaw-Gray | [October 1933] |
| RR/55/154 | Referee's report by Robert Whytlaw-Gray, on a paper 'The atomic weight of protactinium' by Aristid V Grosse | February 1935 |
| RR/65/87 | Referee's report by Robert Whytlaw-Gray, on a paper 'The experimental determination of the compressibilty of gases' by R W Fenning and A C Whiffen | January 1939 |
| RR/70/12 | Letter from Robert Whytlaw-Gray, on a paper 'The physical investigation of certain hygroscopic aerosols' by D W E Axford, K F Sawyer and Theodore Morris Sugden | 12 April 1948 |
| RR/63/60 | Referee's report by Robert Whytlaw-Gray, on a paper 'An attempt to detect the passage of helium through a crystal lattice at high temperatures' by Robert John Strutt, Lord Rayleigh | 29 September 1937 |
| RR/66/221 | Referee's report by Robert Whytlaw-Gray, on a paper 'The adsorption of non-polar gases on alkali halide crystals' by William J C Orr | [September 1939] |
| RR/69/43 | Referee's report by Alfred Charles Glyn Egerton, on a paper 'The rate of evaporation of droplets. Evaporation and diffusion coefficients, and vapour pressures of dibutyl phthalate and butyl stearate' by R S Bradley, Meredith Gwynne Evans and Robert Whytlaw-Gray | 1945 |
| RR/70/10 | Referee's report by Robert Whytlaw-Gray, on a paper 'The physical investigation of certain hygroscopic aerosols' by D W E Axford, K F Sawyer and Theodore Morris Sugden | October 1947 |
| RR/70/11 | Letter from Robert Whytlaw-Gray, on a paper 'The physical investigation of certain hygroscopic aerosols' by D W E Axford, K F Sawyer and Theodore Morris Sugden | 1 December 1947 |
| NLB/65/617 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Norman] Collie, FRS | 29 November 1923 |
| NLB/72/79 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Robert] Whytlaw-Gray, OBE, FRS | 22 February 1929 |
| NLB/72/130 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Robert] Whytlaw-Gray, FRS | 15 April 1929 |
| NLB/72/228 | Copy letter from [Francis Alexander Towle, Assistant Secretary of the Royal Society]; to Sir Herbert Jackson, KBE, FRS | [May 1929] |
| RR/28/34 | Referee's report by Charles Thomson Rees Wilson, on a paper 'Smokes: Part I.—A study of their behaviour and a method of determining the number of particles they contain' by Robert Whytlaw-Gray, J B Speakman and J H P Campbell | [November 1922] |
| RR/54/55 | Referee's report by Robert Whytlaw-Gray, on a paper 'The formation and constitution of crystals of lead salts containing water-soluble colloid' by F D Miles | March 1935 |
| RR/58/67 | Referee's report by Robert Whytlaw-Gray, on a paper 'The persistence of the liquid state of aggregation above the critical temperature. The system ethylene' by Otto Maass and A L Geddes | 8 October 1936 |
| RR/34/76 | Referee's report by Robert John Strutt, Lord Rayleigh, on a paper 'Densities of ultramicroscopic particles' by Hubert Sutton Patterson and Robert Whyltlaw Gray | [October 1926] |
| RR/66/151 | Referee's report by Robert Whytlaw-Gray, on a paper 'Adsorption of lauryl sulphonic acid in the surface of its aqueous solution, and the Gibbs theorem' by James William McBain and Lloyd A Wood | [November 1939] |
| RR/73/35 | Referee's report by Robert Whytlaw-Gray, on a paper 'Diffusion and flow of gases and vapours through micropores. I. Slip flow and molecular streaming' by P C Carman | 1950 |
| RR/73/36 | Referee's report by Robert Whytlaw-Gray, on a paper 'Diffusion and flow of gases and vapours through micropores. II. Surface flow' by P C Carman and P Le R Malherbe | 1950 |
| RR/40/31 | Referee's report by Robert John Strutt, Lord Rayleigh on a paper 'The structure and electrification of smoke particles' by Hubert Sutton Patterson, Robert Whytlaw-Gray, and W Cawood | 1929 |
| RR/36/21 | Referee's report by Robert John Strutt, 4th Baron Rayleigh, on a paper 'The coagulation of smokes and the theory of Smoluchowski' by G Nonhebel, James Colvin, Hubert Sutton Patterson and Robert Whytlaw-Gray | [July 1927] |
| RR/58/65 | Referee's report by Samuel Sugden, on a paper 'The persistence of the liquid state of aggregation above the critical temperature. The system ethylene' by Otto Maass and A L Geddes | July 1936 |
| RR/58/66 | Second referee's report by Robert Whytlaw-Gray, on a paper 'The persistence of the liquid state of aggregation above the critical temperature. The system ethylene' by Otto Maass and A L Geddes | 26 February 1937 |
| RR/72/174 | Referee's report by Robert Whytlaw-Gray, on a paper 'I. The construction of a sensitive and stable quartz microbalance and its use in the determination of gaseous densities; II. A determination of the atomic weights of carbon and nitrogen by the micro-technique' by B Lambert and C S G Phillips | 1949 |