| Reference number | Title | Date |
| NLB/11/347 | Copy letter from Herbert Rix, to Messrs Harrison & Sons | 7 June 1895 |
| NLB/35/43 | Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons | 8 April 1907 |
| NLB/11/969 | Copy letter from Herbert Rix, to Professor George Minchin Minchin, Fellow of the Royal Society | 12 November 1895 |
| NLB/13/792 | Copy letter from an unknown correspondent, to Messrs Harrison & Sons | 26 November 1896 |
| NLB/30/663 | Copy letter from Robert William Frederick Harrison, to Professor George Minchin Minchin, Fellow of the Royal Society | 3 May 1905 |
| NLB/33/630 | Copy letter from Robert William Frederick Harrison, to Professor George Minchin Minchin, Fellow of the Royal Society | 11 October 1906 |
| NLB/44/87 | Copy letter from Joseph Larmor to [George Minchin] Minchin | 3 May 1911 |
| NLB/37/655 | Copy letter from Robert William Frederick Harrison to Professor G [George] M [Minchin] Minchin, Fellow of the Royal Society | 28 April 1908 |
| NLB/37/760 | Copy letter from Robert William Frederick Harrison to Professor G [George] M [Minchin] Minchin, Fellow of the Royal Society | 9 May 1908 |
| NLB/37/866 | Copy Letter from Robert William Frederick Harrison to Professor G [George] M [Minchin] Minchin, Fellow of the Royal Society | 27 May 1908 |
| NLB/44/428 | Copy letter from Robert William Frederick Harrison to Professor G [George] M [Minchin] Minchin FRS | 11 July 1911 |
| RR/19/32 | Letter from George Minchin Minchin to Joseph Larmor, regarding a paper 'On the variation of the resistance of Selenium with the voltage' by E E Fournier d'Albe | 22 January 1912 |
| RR/18/167 | Referee's report by William Napier Shaw, on a paper 'On an electric hydrometer' by George M Minchin | 16 April 1911 |
| RR/20/42 | Referee's report by George Minchin, on a paper 'On the efficiency of selenium as a detector of light' by E E Fournier d'Albe | May 1913 |
| EC/1895/17 | Minchin, George Minchin: certificate of election to the Royal Society | |
| MC/21 | Volume 21 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1906 |
| MC/29/169 | Letter from [Augustus Edward Hough] Love, 34 St Margaret's Road, Oxford, to Mr [Robert] Harrison, [Royal Society] | 24 May 1914 |
| MC/29/170 | Letter from [Augustus Edward Hough] Love, 34 St Margaret's Road, Oxford, to Mr [Robert] Harrison, [Royal Society] | 27 May 1914 |
| MC/29/43 | Letter from [Robert Bellamy] Clifton, 3 Bardwell Road, Oxford, to [Robert] Harrison, [Royal Society] | 31 May 1914 |
| MC/30/129 | Letter form Mrs [Emma] Minchin, 149 Banbury Road, Oxford, to the [Royal Society] | June 1915 |
| MC/21/435 | Letter from [George Minchin] Minchin, 5 Abingdon Court, Kensington, to [Robert William Frederick] Harrison | 16 November 1906 |
| MC/31/100 | Letter from Oliver Lodge, Mariemont, Edgbaston, to mr [Robert] Harrison, [Royal Society] | 7 March 1916 |