| RefNo | Title | Date |
| MM/21/23 | Letter from Oliver Heaviside to GEC Searle | 11 June 1909 |
| EC/1905/13 | Searle, George Frederick Charles: certificate of election to the Royal Society | |
| IM/004098 | Searle, George Frederick Charles | 2000 |
| MM/21/22 | Letter from Oliver Heaviside to GEC Searle | 4 December 1908 |
| NLB/40/600 | Copy letter from Robert William Frederick Harrison to Messrs Harrison & Sons | 2 July 1909 |
| NLB/23/1/112 | Copy letter from A H White, to George Frederick Charles Searle, Fellow of the Royal Society | 24 September 1901 |
| NLB/12/725 | Copy letter from Theodore E James, to George Frederick Charles Searle, 11 Fitzwilliam Street, Cambridge | 20 April 1896 |
| NLB/13/55 | Copy letter from Robert William Frederick Harrison, to Richard Tetley Glazebrook, Fellow of the Royal Society | 2 June 1896 |
| NLB/13/191 | Copy letter from Robert William Frederick Harrison, to George Frederick Charles Searle, [Fellow of the Royal Society], 11 Fitzwilliam Street, Cambridge | 29 June 1896 |
| NLB/13/236 | Copy letter from Robert William Frederick Harrison, to George Frederick Charles Searle, [Fellow of the Royal Society], 11 Fitzwilliam Street, Cambridge | 8 July 1896 |
| NLB/13/389 | Copy letter from Theodore E James, to George Frederick Charles Searle | 13 August 1896 |
| NLB/12/892 | Copy letter from Robert William Frederick Harrison, to Professor Horace Lamb, Fellow of the Royal Society | 23 May 1896 |
| NLB/12/898 | Copy letter from Robert William Frederick Harrison, to Professor Michael Foster, Secretary, Royal Society | 23 May 1896 |
| RR/17/109 | Referee's report by George Frederick Charles Searle, on a paper 'Effects of self-induction in iron cylinder' by Ernest Wilson | 24 May 1906 |
| RR/15/251 | Referee's report by James Alfred Ewing, on a paper 'The measurement of magnetic hysteresis' by George Frederick Charles Searle and T G Bedford | May 1901 |
| RR/17/295 | Referee's report by George Frederick Charles Searle, on a paper 'The electric qualities of porcelain, with special reference to dielectric losses' by H F Haworth | 25 May 1908 |
| RR/16/107 | Referee's report by Hugh Longbourne Callendar, on a paper 'Studies in magnetic testing' by George Frederick Charles Searle | January 1904 |
| RR/17/391 | Referee's report by George Frederick Charles Searle, on a paper 'The behaviour of iron and steel in rotating magnetic fields' by J S C Drysdale | March 1909 |
| NLB/22/516 | Copy letter from Robert William Frederick Harrison, to [George Frederick Charles] Searle, [Fellow of the Royal Society], 11 Fitzwilliam Street, Cambridge | 29 May 1901 |
| NLB/23/1/280 | Copy letter from Robert William Frederick Harrison, to George Frederich Charles Searle, [Fellow of the Royal Society] | 21 October 1901 |
| MC/19/741 | Letter from George Frederick Charles Searle, 20 Trumpington Street, Cambridge, to the Secretary of the Royal Society | 31 August 1904 |
| NLB/28/493 | Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons, St Martin's Lane, W.C. | 15 March 1904 |
| MC/19/740 | Postcard from George Frederick Charles Searle, 20 Trumpington Street, Cambridge, to Robert [William Frederick] Harrison, Assistant Secretary of the Royal Society, Burlington House, Piccadilly | [March 1904] |
| NLB/32/62 | Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons | [20 December 1905] |
| NLB/40/267 | Copy letter from Robert William Frederick Harrison to G [George] F [Frederick] C [Charles] Searle FRS | 14 May 1909 |
| NLB/47/815 | Copy letter from Robert William Frederick Harrison to G [George] F [Frederick] C [Charles] Searle FRS | 16 April 1913 |
| NLB/47/691 | Copy letter from Robert William Frederick Harrison to G [George] F [Frederick] C [Charles] Searle FRS | 15 March 1913 |
| RR/17/100 | Referee's report by George Frederick Charles Searle, on a paper 'The thermomagnetic analysis of meteoric and artificial nickel-iron alloys' by Samuel Walter Johnson Smith | 20 December 1906 |
| RR/65/20 | Second referee's report by George Frederick Charles Searle, on a paper 'Further investigation of the velocity of propagation of light in vacuo in a transverse magnetic field' by C J Banwell and Clinton Coleridge Farr | May 1939 |
| RR/20/125 | Referee's report by George Frederick Charles Searle, on a paper 'Absolute measurements of a resistance by a method based on that of Lorenz' by F E Smith | 12 December 1913 |
| RR/42/44 | Referee's report by Arthur Stanley Eddington, on a paper 'On the force required to stop a moving electrified sphere. -II' by George Frederick Charles Searle | July 1930 |
| RR/13/114 | Letter from Horace Lamb, on a paper 'Problems in electric convection' by George Frederick Charles Searle to Richard Tetley Glazebrook | 30 May 1896 |
| RR/13/112 | Referee's report by George Francis Fitzgerald, on a paper 'Problems in electric convection' by George Frederick Charles Searle | 31 March 1896 |
| RR/13/113 | Referee's report by Joseph Larmor, on a paper 'Problems in electric convection' by George Frederick Charles Searle | 28 April 1896 |
| RR/13/115 | Referee's report by Horace Lamb, on a paper 'Problems in electric convection' by George Frederick Charles Searle | 30 May 1896 |
| RR/13/116 | Letter from George Frederick Charles Searle, on his paper 'Problems in electric convection' to the Secretary of the Royal Society | 1 July 1896 |
| RR/18/42 | Referee's report by George Frederick Charles Searle, on a paper 'On the magnetic properties of iron and its alloys in intense field' by Robert Abbott Hadfield and Bertram Hopkinson | 14 June 1910 |
| NLB/67/689 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [George Frederick Charles] Searle, FRS | 14 February 1925 |
| RR/17/454 | Referee's report by George Frederick Charles Searle, on a paper 'Magnetic viscosity' by Ernest Wison, G F O'Dell and H W K Jennings | 7 June 1909 |
| NLB/13/405 | Copy letter from A H White, to Lord Rayleigh [John William Strutt], [Secretary, Royal Society] | 21 August 1896 |
| NLB/13/187 | Copy letter from Robert William Frederick Harrison, to Richard Tetley Glazebrook, Fellow of the Royal Society | 27 June 1896 |
| NLB/13/209 | Copy letter from Robert William Frederick Harrison, to Richard Tetley Glazebrook, Fellow of the Royal Society | 2 July 1896 |
| RR/16/108 | Referee's report by John Ambrose Fleming, on a paper 'Studies in magnetic testing' by George Frederick Charles Searle | January 1904 |
| RR/17/189 | Referee's report by George Frederick Charles Searle, on the Bakerian Lecture 'The effect of temperature and pressure on the thermal conductivities of solids.—Part II. The effects of low temperatures on the thermal and electrical conductivities of certain approximately pure metals and alloys' by Charles Herbert Lees | 10 December 1907 |
| RR/65/21 | Referee's report by George Frederick Charles Searle, on a paper 'Further investigation of the velocity of propagation of light in vacuo in a transverse magnetic field' by C J Banwell and Clinton Coleridge Farr | 22 February 1938 |
| NLB/12/897 | Copy letter from Robert William Frederick Harrison, to Richard Tetley Glazebrook, Fellow of the Royal Society | 23 May 1896 |
| RR/15/252 | Referee's report by John Ambrose Fleming, on a paper 'The measurement of magnetic hysteresis' by George Frederick Charles Searle and T G Bedford | May 1901 |
| RR/20/85 | Referee's report by George Frederick Charles Searle, on a paper 'On the self-inductance of circular coils of rectangular section' by Thomas Ranken Lyle | May 1913 |
| RR/51/58 | Referee's report by George Frederick Charles Searle, on a paper 'Determinations of the fundamental standards of length in terms of wave-lengths of light' by J E Sears, Junr. and H Barrell | [January 1934] |
| RR/55/141 | Referee's report by George Frederick Charles Searle, on a paper 'The galvanometer constant of a circular coil of many windings' by Richard Tetley Glazebrook | 14 March 1935 |
| MC/20 | Volume 20 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1905 |
| MC/19/739 | Letter from George Frederick Charles Searle, 20 Trumpington Street, Cambridge, to the Assistant Secretary of the Royal Society | 7 March 1904 |
| NLB/28/505 | Copy letter from Robert William Frederick Harrison, to George Frederick Charles Searle, 20 Trumpington Street, Cambridge | 21 March 1904 |
| MC/19/742 | Letter from George Frederick Charles Searle, Wyncote, Hills Road, Cambridge, to [Robert William Frederick] Harrison | 1 October 1904 |
| MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |
| MC/20/357 | Letter from [George Frederick Charles] Searle, Wyncote, Hills Road, Cambridge, to [Joseph] Larmor | 16 May 1905 |