Letter from David Prain, 65 Cornhill, London, to the Secretary of the Royal Society, Burlington House, Piccadilly 'Sir, In compliance with the request contained in your letter of May 12th, just received, I beg to enclose, duly filled in, the form showing date and place of my birth. There is no reason why this information should be considered confidential. I am, Your obedient servant, David Prain, Lieut. Colonel I. M. S.'. 21 June 1905