| Reference number | Title | Date |
| IM/GA/Baron/2255 | Ellis, Sir Charles Drummond | 1960 |
| RR/63/16 | Referee's report by Charles Drummond Ellis, on a paper 'The influence of temperature on the capture of neutrons by various elements' by J L Michiels and J A Saxton | July 1937 |
| RR/42/82 | Referee's report by Charles Drummond Ellis, on a paper 'The rate of loss of energy by ß-particles in passing through matter' by Evan James Williams | October 1930 |
| RR/42/83 | Referee's report by Charles Drummond Ellis, on a paper 'The loss of energy by ß-particles and its distribution between different kinds of collisions' by Evan James Williams | October 1930 |
| RR/49/129 | Referee's report by Charles Drummond Ellis, on a paper 'Experiments on molecular scattering in gases. I.-The method of crossed molecular beams' by Ronald G J Fraser and L F Broadway | [May 1933] |
| RR/66/213 | Referee's report by Charles Drummond Ellis, on a paper 'The ß-ray spectrum of radium E' by G J Neary | [December 1939] |
| RR/52/133 | Referee's report by Charles Drummond Ellis, on a paper 'The x and b rays of radioactinium' by Harold Albert Wilson | October 1934 |
| RR/49/39 | Referee's report by Cecil Drummond Ellis, on a paper 'Experiments on molecular scattering in gases. II.—The collision of sodium and potassium atoms with mercury' by L F Broadway | [May 1933] |
| RR/50/123 | Referee's report by Charles Drummond Ellis, on a paper 'Atomic constants deduced from secondary cathode ray measurements' by Harold Roper Robinson, J P Andrews and E J Irons | September 1933 |
| RR/53/9 | Referee's report by Charles Drummond Ellis, on a paper 'The probability of inner shell ionization of atoms by electron impact' by Eric Henry Stonely Burhop | [March 1934] |
| RR/51/142 | Referee's report by Charles Drummond Ellis, on a paper 'The energies of alpha and gamma rays' by Harold Albert Wilson | [January 1934] |
| RR/49/49 | Referee's report by Cecil Drummond Ellis, on a paper 'On the relative probability of the ionization of an atom in the K and L shells by electron impact' by Eric Henry Stonely Burhop | [January 1934] |
| RR/53/76 | Referee's report by Charles Drummond Ellis, on a paper 'The internal conversion of Y-rays' by J B Fisk and H M Taylor | [April 1934] |
| RR/52/130 | Referee's report by Charles Drummond Ellis, on a paper 'The energies of alpha, beta, and gamma rays' by Harold Albert Wilson | July 1934 |
| RR/54/3 | Referee's report by Charles Drummond Ellis, on a paper 'Cathode ray oscillography of gas adsorption phenomena. I. A method for measuring high-velocity approach to certain physical and chemical equilibria' by M C Johnson and F A Vick | April 1935 |
| RR/60/67 | Referee's report by Charles Drummond Ellis, on a paper 'On the energy losses of electrons in molecular nitrogen' by J E Roberts, Richard Whiddington and E G Woodroofe | May 1936 |
| RR/52/128 | Referee's report by Charles Drummond Ellis, on a paper 'The energies of alpha, beta, and gamma rays' by Harold Albert Wilson | February 1934 |
| RR/51/141 | Referee's report by Charles Drummond Ellis, on a paper 'On the Y rays of radium C' by Harold Albert Wilson | [October 1933] |
| RR/61/59 | Second referee's report by Charles Drummond Ellis, on a paper 'Experiments with iso-energetic neutrons' by E T Booth and C Hurst | May 1937 |
| RR/57/106 | Referee's report by Charles Drummond Ellis, on a paper 'The measurement of the energy of cosmic rays I—The electro-magnet and cloud chamber' by Patrick Maynard Stuart Blackett | [February 1936] |
| RR/54/5 | Second referee's report by Charles Drummond Ellis, on a paper 'Magnetic properties of supraconductors' by T C Keeley and K Mendelssohn | December 1935 |
| RR/55/44 | Referee's report by Charles Drummond Ellis, on a paper 'The measurement of the energy of cosmic rays - II—The curvature measurements and the energy spectrum' by Patrick Maynard Stuart Blackett and R B Brode | January 1936 |
| RR/63/64 | Referee's report by Charles Drummond Ellis, on a paper 'The shape of the continuous beta-spectrum of thorium C. C' by H O W Richardson and Alice Leigh-Smith | July 1937 |
| RR/54/4 | Second referee's report by Charles Drummond Ellis, on a paper 'Cathode ray oscillography of gas adsorption phenomena. I. A method for measuring high-velocity approach to certain physical and chemical equilibria' by M C Johnson and F A Vick | May 1935 |
| RR/57/60 | Referee's report by Charles Drummond Ellis, on a paper 'The energies of alpha and gamma rays' by Harold Albert Wilson | [February 1935] |
| RR/54/6 | Referee's report by Charles Drummond Ellis, on a paper 'Magnetic properties of supraconductors' by T C Keeley and K Mendelssohn | December 1935 |
| RR/58/79 | Referee's report by Charles Drummond Ellis, on a paper 'Negative atomic ions' by H S W Massey and Robert Allan Smith | March 1936 |
| RR/62/51 | Referee's report by Charles Drummond Ellis, on a paper 'Calculated wave functions and energy values for X-ray terms of potassium' by W A Thatcher | [October 1936] |
| RR/66/153 | Referee's report by Charles Drummond Ellis, on a paper 'The ß-radiations of uranium X1 and uranium X2' by J S Marshall | [September 1939] |
| RR/67/251 | Referee's report by Charles Drummond Ellis, on a paper 'The emission and transmission of X and gamma radiation' by George William Clarkson Kaye and W Binks | 20 March 1945 |
| RR/67/419 | Referee's report by Charles Drummond Ellis, on a paper 'ß-ray spectra of light elements' by Albert Alan Townsend | June 1940 |
| RR/68/493 | Letter from Charles Drummond Ellis, to Alfred Charles Glyn Egerton, regarding a paper 'Absorption of radium (B+C) gamma-rays' by J E Roberts | 31 March 1944 |
| RR/69/293 | Referee's report by Charles Drummond Ellis, on a paper 'Intensities of Y rays, studied by means of their Compton secondaries' by Karl Manne Georg Siegbahn | 1946 |
| RR/68/484 | Referee's report by Charles Drummond Ellis, on three papers 'The transition effect of penetrating showers' and 'The barometer effect of penetrating showers' by L Jánossy and George Dixon Rochester, and 'Some aspects of the production of mesons and the barometer effect of penetrating showers' by L Jánossy | [1944] |
| RR/68/496 | Referee's report by Charles Drummond Ellis, on a paper 'Absorption of radium (B+C) gamma-rays' by J E Roberts | [1944] |
| NLB/65/736 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS | 14 December 1923 |
| NLB/65/570 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS | 22 November 1923 |
| NLB/72/896 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [Charles Drummond] Ellis, FRS | 20 June 1930 |
| RR/49/36 | Referee's report by Charles Drummond Ellis, on a paper 'Emission of metallic ions from oxide surfaces. I.—Identification of the ions by mobility measurements' by Luang Brata | [March 1933] |
| RR/65/176 | Referee's report by Charles Drummond Ellis, on a paper 'The ß-ray spectrum of Ra E' by Leslie Harold Martin and Albert Alan Townsend | 2 September 1938 |
| RR/49/37 | Referee's report by Charles Drummond Ellis, on a paper 'Emission of metallic ions from oxide surfaces. II.—Mechanism of the emission' by Cecil Frank Powell and Luang Brata | [March 1933] |
| NLB/65/722 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to James Hopwood Jeans, Secretary of the Royal Society | 12 December 1923 |
| EC/1929/03 | Ellis, Sir Charles Drummond: certificate of election to the Royal Society | |
| RR/66/60 | Referee's report by Charles Drummond Ellis, on a paper 'Some measurements of Y- ray energies' by Samuel Crowe Curran, Philip Ivor Dee and J E Strothers | [December 1939] |
| RR/44/68 | Referee's report by Charles Drummond Ellis, on a paper 'Longitudinal asymmetry of scattered photo-electrons and the asymmetrical Maxwell field of accelerated electrons' by L Simons | 8 February 1932 |
| RR/46/113 | Referee's report by Charles Drummond Ellis, on a paper 'On the photographic action of slow electrons' by Richard Whiddington and J E Taylor | [March 1932] |
| RR/49/51 | Referee's report by Cecil Drummond Ellis, on a paper 'On the variation of the intensity of K and L series radiation with tube potential' by Eric Henry Stonely Burhop | [January 1934] |
| RR/49/128 | Referee's report by Charles Drummond Ellis, on a paper 'Experiments on molecular scattering in gases. I.-The method of crossed molecular beams' by Ronald G J Fraser and L F Broadway | [May 1933] |
| RR/51/140 | Referee's report by Charles Drummond Ellis, on a paper 'On the B rays of radium C' by Harold Albert Wilson | [November 1933] |
| RR/56/21 | Referee's report by Charles Drummond Ellis, on a paper 'Helium-ratios of rocks and minerals from the diamond pipes of South Africa' by Arthur Holmes and Friedrich Adolf Paneth | [December 1935] |
| RR/61/60 | Referee's report by Charles Drummond Ellis, on a paper 'Experiments with iso-energetic neutrons - Parts I & II' by E T Booth and C Hurst | April 1937 |
| RR/67/353 | Letter from J D Griffith Davies, Assistant Secretary of the Royal Society, on a paper 'On the salinity of the surface waters of the Irish Sea' by Joseph Proudman to members of the Sectional Committee for Physics | 27 December 1940 |