Letter from [Ernest Clifford] Hardy, Hydrographic Department, Admiralty, London, S.W, to The Secretaries of the Royal Society, Burlington House, W Requests information on whether two chronometers loaned for the Magnetic Survey of the British Isles by Mr. George Walker Walker are still required. If not, asks for their return to the Royal Observatory, Greenwich, with proper packing instructions enclosed [enclosure not present]. 13 February 1917