Lord Simon's papers consist of:
- Personal papers
- Correspondence and papers relating to political and legal affairs
- Speeches, lectures and broadcasts
- Printed papers
- Newspaper cuttings and photographs
One of the largest series of correspondence in the collection relates to foreign affairs. While Foreign Secretary Lord Simon had to counter allegations concerning the shares that he had held in Imperial Chemical Industries, and Vickers. Copies of the letters relating to the subject were made at the time of Lord Simon's libel suit against the Reverend J. Whitaker Bond in 1935 and they have been kept with the originals. There is also correspondence relating to Lord Simon's legal activities, his Chairmanship of the Indian Statutory Commission from 1927 to 1930, and carbon copies of the text of his examination of Rudolph Hess in 1940 after Hess had flown from Germany to England. The history of the Liberal National Party is well-documented in the correspondence of Lord Simon, his political secretary, Sir Rowland Evans, and in the volumes of newspaper cuttings.