Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Joseph [John] Thomson, PRS Asking Sir Joseph [John] Thomson, President of the Royal Society if 12 August would be convenient for a meeting of the Committee to confer with the Director General of the Ordnance Survey to make a recommendation to the Board of Agriculture on the appointment of a research officer and scientific advisor on the staff of the Ordnance Survey. 8 July 1919