Copy letter from Robert William Frederick Harrison, to Sir William Crookes, Fellow of the Royal Society 'Dear Sir William, It will be necessary to hold a Soiree Committee before October 31st., in order to discuss the arrangements for the Anniversary Dinner. Would Thursday, October 29, at 3 p.m. suit you? If not, will you mention an alternative day, before the 31st October. I am, faithfully yours, Robt [Robert] Harrison Assistant Secretary R.S. [Royal Society] Perhaps you could give us a choice of days, so as to try & secure the attendance of Officers. Would Wednesday 30th perhaps be better? RH'. 18 October 1907