The collection provides some documentation for most aspects of Sutherland's career, apart from his two periods at the University of Michigan, for which there is virtually no material. For the 1930s there is extensive correspondence, but no laboratory records, and for the wartime period there is a very full sequence of letters exchanged with H.W. Thompson, 1937-1947. Section C contains papers relating to the National Physical Laboratory, and Section D documents Sutherland's involvement with various societies and organisations, and has considerable material on the formation of the International Organisation for Pure and Applied Biophysics, in which Sutherland played a major part. Section E contains correspondence on issues of science policy, as well as Sutherland's own drafts and reports. The correspondence in Section H dates mainly from Sutherland's period at the N.P.L., all earlier letters being in Section B.