Correspondence between Rupert Everett Billingham and the Royal Society General correspondence following Billingham's election to the Royal Society: on his delayed admission and visit to England, his Yearbook entry and other minor matters. 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 R.E. Billingham F.R.S., The Wistar Institute, 36th Street at Spruce, Philadelphia 4, U.S.A'. 16 March-28 August 1961