Correspondence and papers on the Trend Committee Includes: copy of official request to Royal Society to submit evidence, invitation to Blackett to serve on Physics Sub-Committee, annotated minutes, Blackett's notes of meetings, his draft report of evidence (12 November, 4 copies), a second version after discussion with Lord Bridges, and final agreed draft version with Frederic C Williams. Correspondents include: Sir David Christie Martin. August-December 1962