| RefNo | Title | Date |
| EC/1923/06 | Horton, Frank: certificate of election to the Royal Society | |
| IM/GA/WS/2855 | Horton, Frank | nd |
| MC/19/443 | Letter from [Frank] Horton, St John's College, Cambridge, to the Royal Society | 26 April 1904 |
| RR/16/202 | Referee's report by Joseph Larmor, on a paper 'The modulus of torsional rigidity of Quartz fibres, and its temperature coefficient' by Frank Horton | December 1904 |
| RR/16/201 | Referee's report by Charles Vernon Boys, on a paper 'The modulus of torsional rigidity of Quartz fibres, and its temperature coefficient' by Frank Horton | December 1904 |
| RR/16/200 | Second referee's report by John Henry Poynting, on a paper 'The effects of changes of temperature on the modulus of torsional rigidity of metal wires' by Frank Horton | 25 May 1904 |
| RR/17/54 | Referee's report by Harold Albert Wilson, on a paper 'On the discharge of negative electricity from hot calcium and from lime' by Frank Horton | [January 1907] |
| NLB/30/50 | Copy letter from Joseph Larmor, to Dr Frank Horton, [Fellow of the Royal Society], St John's College, Cambridge | January 1905 |
| NLB/27/363 | Copy letter from Theodore E James, to Dr Frank Horton, [Fellow of the Royal Society], St John's College, Cambridge | 21 August 1903 |
| RR/27/90 | Referee's report by Owen Willans Richardson, on a paper 'A spectroscopic investigation of the ionisation of argon by electron collisions' by Frank Horton and Ann Catherine Davies | August 1922 |
| MC/20/59 | Letter from [Frank] Horton, St John's College, Cambridge, to Professor [Joseph] Larmor | 12 January 1905 |
| MC/19/442 | Letter from Frank Horton, 17 Park Parade, Cambridge, the Assistant Secretary of the Royal Society | 15 February 1904 |
| RR/16/198 | Referee's report by William Watson, on a paper 'The effects of changes of temperature on the modulus of torsional rigidity of metal wires' by Frank Horton | 18 April 1904 |
| RR/42/40 | Referee's report by Frank Horton, on a paper 'On a search for radiation accompanying the scattering of comparatively slow electrons at the surface of incandescent solids' by Erik Rudberg | October 1930 |
| RR/29/76 | Referee's report by Frank Horton, on a paper 'The thermionic and photo-electric properties of the electro-positive metals' by A F A Young | August 1923 |
| RR/40/106 | Referee's report by Frank Horton, on a paper 'On the chemical interaction of ions and the "clean up" of gases at glass surfaces under the influence of the electrical discharge' by James Taylor | January 1929 |
| RR/18/149 | Referee's report by George Downing Liveing, on a paper 'The vacuum tube spectra of mercury' by Frank Horton | 1 May 1911 |
| RR/37/146 | Referee's report by Frank Horton, on a paper 'The electrical conductivity of thin oil films. Part I.-General nature of the phenomenon' by Herbert Edmeston Watson and A S Menon | October 1928 |
| RR/42/38 | Referee's report by Frank Horton, on a paper 'Energy losses of electrons in nitrogen' by Erik Rudberg | September 1930 |
| RR/43/33 | Referee's report by Frank Horton, on a paper 'A simple method of measuring surface tension' by John Henry Gaddum | August 1931 |
| RR/42/39 | Referee's report by Frank Horton, on a paper 'On a search for radiation accompanying the scattering of comparatively slow electrons at the surface of incandescent solids' by Erik Rudberg | September 1930 |
| RR/42/76 | Referee's report by Frank Horton 'The raman spectra of some aldehydes and of mesitylene' by S Venkateswaran and S Bhagavantam | March 1930 |
| RR/40/58 | Referee's report by Frank Horton, on a paper 'Study of electrolytic dissociation by the Raman effect. I.—Nitric acid' by I. Ramakrishna Rao | February 1930 |
| RR/44/69 | Referee's report by Frank Horton, on a paper 'The excitation potentials of light metals. I.—Lithium' by Herbert Wakefield Banks Skinner | October 1931 |
| RR/36/20 | Referee's report by Frank Horton, on a paper 'On the input limit of an X-ray tube with circular focus' by Alex Muller | [September 1927] |
| RR/51/108 | Referee's report by Frank Horton, on a paper 'On the transmission of infra-red radiation by some skin samples' by H J Taylor | [March 1933] |
| RR/41/23 | Referee's report by Frank Horton, on a paper 'The Raman spectra of some organic halogen compounds' by S Bhagavantam and S Venkateswaran | February 1930 |
| RR/51/106 | Second referee's report by Frank Horton, on a paper 'The transmission of infra-red radiation by a thin layer of horn' by H J Taylor | 14 August 1933 |
| RR/55/93 | Referee's report by Frank Horton, on a paper 'Studies on explosive antimony. II - Its structure, electrical conductivity, and rate of crystallization' by C C Coffin | April 1935 |
| RR/69/173 | Second referee's report by Arthur Mannering Tyndall, on a paper 'The ionization of helium by neutral helium atoms' by Frank Horton and Dorothy M Millest | 1945 |
| RR/61/65 | Referee's report by Frank Horton, on a paper 'Studies in contact potentials. III' by Richard Charles Leslie Bosworth | June 1937 |
| RR/69/172 | Referee's report by Arthur Mannering Tyndall, on a paper 'The ionization of helium by neutral helium atoms' by Frank Horton and Dorothy M Millest | 19 March 1945 |
| NLB/65/221 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Frank] Horton, FRS | 24 September 1923 |
| RR/41/59 | Referee's report by Owen Willans Richardson, on a paper 'Critical potentials for the excitation of soft x-rays from iron' by Ann Catherine Davies and Frank Horton | 1930 |
| NLB/71/82 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [Frank] Horton, FRS | 23 December 1927 |
| RR/46/48 | Referee's report by Frank Horton, on a paper 'The relation between mean atomic volume and composition in copper-zinc alloys' by E A Owen and Llewelyn Pickup | [November 1932] |
| NLB/65/140 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Lord Rayleigh [Robert John Strutt], FRS | 10 August 1923 |
| RR/17/53 | Referee's report by Joseph Larmor, on a paper 'On the discharge of negative electricity from hot calcium and from lime' by Frank Horton | 22 December 1906 |
| RR/16/199 | Referee's report by John Henry Poynting, on a paper 'The effects of changes of temperature on the modulus of torsional rigidity of metal wires' by Frank Horton | April 1904 |
| RR/16/197 | Referee's report by Andrew Gray, on a paper 'The effects of changes of temperature on the modulus of torsional rigidity of metal wires' by Frank Horton | 10 April 1904 |
| RR/21/91 | Referee's report by John Sealy Edward Townsend, on a paper 'On the origin of the electron emission from glowing solids' by Frank Horton | [June 1914] |
| RR/25/22 | Referee's report by Owen Willans Richardson, on a paper 'An inverstigation of the ionising power of the positive ions from a glowing tantalum filament in helium' by Frank Horton and Ann Catherine Davies | [September 1918] |
| RR/25/23 | Referee's report by Robert John Strutt, Lord Rayleigh, on a paper 'An inverstigation of the ionising power of the positive ions from a glowing tantalum filament in helium' by Frank Horton and Ann Catherine Davies | [October 1918] |
| RR/44/16 | Referee's report by Frank Horton, on a paper 'Measurements of transmission of radiation through a non-homogeneous medium, viz., the horny layer of the human skin' by T C Angus and H J Taylor | August 1931 |
| RR/46/46 | Referee's report by Frank Horton, on a paper 'Variation of mean atomic volume with temperature in copper-zinc alloys, with observations on the ß-transformation' by E A Owen and Llewelyn Pickup | [December 1932] |
| RR/51/105 | Referee's report by Frank Horton, on a paper 'The transmission of infra-red radiation by a thin layer of horn' by H J Taylor | [July 1933] |
| RR/61/63 | Referee's report by Frank Horton, on a paper 'Studies in contact potentials. I' by Richard Charles Leslie Bosworth and Eric Keightley Rideal | May 1937 |
| RR/61/64 | Referee's report by Frank Horton, on a paper 'Studies in contact potentials. II' by Richard Charles Leslie Bosworth and Eric Keightley Rideal | May 1937 |
| RR/64/21 | Referee's report by Frank Horton, on a paper 'The ionization potentials of the free radicals methyl and ethyl' by R G J Fraser and T N Jewitt | [March 1937] |
| MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |
| MC/30/94 | Letter from [Frank] Horton, The Pines, Englefield Green, Surrey, to Sir Joseph [Larmor], [Royal Society] | 9 February 1915 |
| MC/20 | Volume 20 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1905 |