Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to H. Pitt Esq.; The Armourers and Brasiers Company Informs H. Pitt that the only authority on 'Sound' that they can think of is Mr [Charles Vernon] Boys FRS, but that he is now too elderly to give evidence in a court. Suggests Pitt write to Boys himself and asks him to suggest someone, and gives Boys' address. 9 October 1929