Correspondence between James Macdonald Cassels and the Royal Society General correspondence following Cassels' election to the Royal Society: on admission arrangements, fees and Yearbook entry. Including brief letters from Herbert Frohlich and H W B Skinner. Letters to and from the Assistant Secretary, David Christie Martin and the Librarian, Igor Kaye. The original file featured the typed name and address: 'Professor J.M. Cassels F.R.S., Depratment of Physics, Cornell University, Ithaca, New York, U.S.A.'. 19 March-7 April 1959