The Plowden Papers include: engagement diaries (1947-93); a wide range of political and personal correspondence (1946-94); copies of speeches (1960-90); working papers and correspondence on Plowden's autobiography "An Industrialist in the Treasury"; a large amount of papers relating to public commitments such as atomic energy, Plowden's various committees, political groups and business interests, enquiries into the police, the review board on top salaries etc (1957-95); press cuttings and photographs.