| RefNo | Title | Date |
| PB/4/8/48 | Correspondence with Frank Twyman | 1942 |
| EC/1924/15 | Twyman, Frank: certificate of election to the Royal Society | |
| RR/47/24 | Referee's report by Frank Twyman, on a paper 'The modes of vibration of quartz piezo-electric plates as revealed by an interferometer' by William David Dye | June 1932 |
| RR/43/46 | Referee's report by Frank Twyman, on a paper 'The colorimetric properties of the spectrum' by J Guild | February 1931 |
| RR/60/57 | Referee's report by Frank Twyman, on a paper 'A study of glass surfaces in optical contact' by Robert John Strutt, Lord Rayleigh | June 1936 |
| RR/44/44 | Referee's report by Frank Twyman, on a paper 'A vacuum spectrometer for long wave-length X-rays' by R T W Bingham | June 1931 |
| RR/44/111 | Second referee's report by Frank Twyman, on a paper 'Determination of the yard in wave-lengths of light' by Alfred Edwin Howard Tutton | July 1931 |
| RR/49/97 | Referee's report by Frank Twyman, on a paper 'On particle size and concentration in opal glasses II' by C Dunbar | [May 1933] |
| RR/44/110 | Referee's report by Frank Twyman, on a paper 'Determination of the yard in wave-lengths of light' by Alfred Edwin Howard Tutton | April 1931 |
| RR/46/110 | Referee's report by John Cunningham McLennan, on a paper 'A new apparatus for rapid spectrophotometry of liquids in the ultra-violet region' by Frank Twyman | [July 1932] |
| RR/49/99 | Referee's report by Frank Twyman, on a paper 'On particle size and concentration in opal glasses I' by C Dunbar | 30 May 1933 |
| RR/50/92 | Referee's report by Frank Twyman, on a paper 'A spectrographic investigation of the metallic content of the liver in childhood' by Hugh Ramage and J H Sheldon | 5 May 1933 |
| RR/55/128 | Referee's report by Frank Twyman, on a paper 'Quantitative spectrographic analysis of biological material. I-A method for the determination of lead in cerebrospinal fluid' by John Stuart Foster, G O Langstroth and D R McRae | August 1935 |
| RR/69/210 | Referee's report by Frank Tywman, on a paper 'Krypton vacuum wave-length measurements' by T A Littlefield | 1945 |
| NLB/68/668 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Frank] Twyman Esq., FRS | 8 October 1925 |
| NLB/68/755 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Frank] Twyman Esq., FRS | 30 October 1925 |
| NLB/72/30 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Frank] Twyman Esq., FRS | 25 January 1929 |
| NLB/72/848 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Frank] Twyman Esq., FRS; Messrs Adam Hilger, Ltd. | 27 May 1930 |
| RR/57/41 | Referee's report by Frank Twyman, on a paper 'On experimental and theoretical problems of photography I and II' by J E P Wagstaff and W A Prowse | [March 1935] |
| RR/50/91 | Referee's report by Alfred Fowler, on a paper 'A spectrographic investigation of the metallic content of the liver in childhood' by Hugh Ramage and J H Sheldon | 13 April 1933 |
| RR/46/111 | Referee's report by Frederick Alexander Lindemann, Viscount Cherwell, on a paper 'A new apparatus for rapid spectrophotometry of liquids in the ultra-violet region' by Frank Twyman | [June 1932] |
| RR/64/13 | Referee's report by Frank Twyman, on a paper 'Quantitative spectrographic analysis of biological material. III. A method for the determination of sodium and potassium in glandular secretions' by John Stuart Foster, G O Langstroth and D R McRae | [December 1937] |
| RR/46/101 | Referee's report by Frank Twyman, on a paper 'A new apparatus for determining the relationship between wave-lengths of light and the fundamental standards of length' by J E Sears and H Barrell | [March 1932] |
| RR/64/16 | Referee's report by Frank Twyman, on a paper 'Quantitative spectrographic analysis of biological material-II' by John Stuart Foster and C A Horton | [April 1937] |
| MC/39/110 | Letter from [Frank] Twyman, Stanhope, Eastbury Avenue, Northwood, Middlesex, to the Secretary of the Royal Society, Burlington House | 21 October 1925 |
| MC/39 | Volume 39 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1925 |
| RR/79/117 | Referee's report by Frank Twyman, on a paper 'The possibility of comparing line standards of length photographically' by Alan Hugh Cook | 6 June 1953 |