'Some notes on the relationship between the sciences' Includes: 17pp autograph manuscript, extensively revised 7pp typescript version, with manuscript note 'Date uncertain. Possibly 1943/44 derivation from Ops Res papers 3pp manuscript plan for the paper Blackett's notes on papers and books by others Letter of comment on the white paper signed 'G', with manuscript note by Blackett. Writer unidentified. Probably when I was in Washington in winter of 1943' (see D.90) Letter from 'Henry' [HR Hulme] sent from Bletchley, February 1942, discussing a paper by Blackett and other matters c.1942-1944