| RefNo | Title | Date |
| EC/1895/18 | Power, Sir William Henry: certificate of election to the Royal Society | |
| NLB/14/113 | Copy letter from an unknown correspondent, to Messrs Harrison & Sons | 7 January 1897 |
| RR/17/78 | Referee's report by William Henry Power, on a paper 'Nitrification of sewage' by George Reid | 28 May 1906 |
| NLB/15/88 | Copy letter from Robert William Frederick Harrison, to William Henry Power, Fellow of the Royal Society | 29 June 1897 |
| NLB/20/683 | Copy letter from Robert William Frederick Harrison, to Dr William Henry Power, Fellow of the Royal Society, Local Government Board, Whitehall | 15 June 1900 |
| NLB/22/243 | Copy letter from Robert William Frederick Harrison, to [William Henry] Power, Fellow of the Royal Society | 29 March 1901 |
| NLB/32/756 | Copy letter from Robert William Frederick Harrison, to William Henry Power, Fellow of the Royal Society | 21 May 1906 |
| NLB/36/552 | Copy letter from Robert William Frederick Harrison, to Dr William Henry Power, Fellow of the Royal Society | 13 November 1907 |
| NLB/36/692 | Copy letter from Archibald Geikie, to Mr [William Henry] Power, [Fellow of the Royal Society] | 3 December 1907 |
| NLB/36/699 | Copy letter from Robert William Frederick Harrison, to William Henry Power, Fellow of the Royal Society | 3 December 1907 |
| NLB/38/121 | Copy letter from Robert William Frederick Harrison, to William Henry Power, Fellow of the Royal Society | 17 June 1908 |
| NLB/36/847 | Copy letter from Robert William Frederick Harrison, to William Henry Power, Fellow of the Royal Society | 27 December 1907 |
| NLB/39/306 | Copy letter from Robert William Frederick Harrison to Sir W [William] H [Henry] Power, Fellow of the Royal Society | 23 December 1908 |
| NLB/41/616 | Copy letter from Robert William Frederick Harrison, to Sir William Power, Fellow of the Royal Society | 24 January 1910 |
| NLB/48/284 | Copy letter from Robert William Frederick Harrison, to Sir [William Henry] Power, Fellow of the Royal Society | 10 June 1913 |
| NLB/53/545 | Copy letter from [Sir Joseph John] Thomson, President of the Royal Society and FRS; to [Mrs. Power] | 25 October 1916 |
| NLB/52/437 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir William Henry Power, FRS | 8 December 1915 |
| NLB/52/508 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir William Henry Power, FRS | 4 January 1915 |
| NLB/54/2 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [George Henry Falkiner] Nuttall, FRS | 11 January 1917 |
| NLB/53/529 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Sydney Arthur] Monckton Copeman, FRS | 24 October 1916 |
| NLB/53/406 | Copy letter from [Robert William Frederick Harrison], Assistant Secretary of the Royal Society; to unknown correspondent | 31 July 1916 |
| NLB/40/532 | Copy letter from Robert William Frederick Harrison to Sir W [William] H [Henry] Power KCB, FRS, Holly Lodge, East Molesey | 22 June 1909 |
| NLB/51/753 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Sir William Henry Power KCB, FRS | 18 June 1915 |
| MC/18/58 | Letter from [Michael] Foster, The Royal Society, Burlington House, to [Robert William Frederick] Harrison | 18 January [1903] |
| MC/18/60 | Letter from [Michael] Foster, Nine Wells, Great Shelford, Cambridge, to [Robert William Frederick] Harrison | 21 January 1903 |
| NLB/37/885 | Copy Letter from Robert William Frederick Harrison to Dr W [William] H [Henry] Power, CB, Fellow of the Royal Society | 29 May 1908 |
| MC/17 | Volume 17 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1897-1899 |