Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Henry Selby] Hele Shaw, FRS 'Referring to your letter of January 5th, and in accordance with your instructions of January 8th, I have to-day sent your sealed packet to the Secretary, Dr. Hele-Shaw, 64 Victoria Street, duly initialed and dated across the flap of the envelope.' 9 January 1919