Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to Professor [Micaiah John Muller] Hill, FRS; 18 Ferncroft Avenue, Hampstead, N.W. Informs Professor [Micaiah John Muller] Hill that the Society is sending him A 648 Proceeding to complete his series. Notes that Professor Hill's name has been put on Harrison & Sons list of those who prefer to receive Trans A. in bound form and that this will apply to future issues. 18 May 1917