Includes: research material for books on the Churchill family, including originals and copies of family correspondence, particularly MS's own correspondence with her mother; personal and office diaries; papers relating to MS's time with her husband in Paris and Rhodesia; correspondence; photographs, both relating to MS's own career, and those which she collected as source material for her books on the Churchill family; speeches; papers relating to visits and lectures undertaken by MS on behalf of the Churchill Centre and International Churchill Society; papers on other Churchill-related organisations with which MS was involved; papers relating to the National Theatre; audio-visual material, including wartime footage of Churchill, documentaries about him, and interviews and events with MS herself; the personal papers of Maryott Whyte, MS's nanny.