This series includes the papers generated and accumulated by Diefenbaker from March 1940 to December 1956, excluding his legal papers (MG 01/I Legal Series) and his family correspondence (MG 01/V Family Series). In addition to the four subseries there are files on political and other topics.

This series contains the correspondence and reference material created and accumulated by John Diefenbaker’s office from the time he ceased being Leader of the Opposition until his death.

This series consists primarily of those files deemed too sensitive for processing in Diefenbaker’s regular office filing system due to political, personal or security considerations. VIP letters and other documents which Diefenbaker particularly valued are also included. Inter-filed with both categories of material is a body of more mundane documents which Diefenbaker and his staff wanted close at hand for a variety of reasons.

This series contains those files which appeared to have been removed from their original order or created specifically for use in writing John Diefenbaker’s memoirs. It also contains correspondence about the memoirs project, notes, and drafts of the memoirs, One Canada. There are notes and annotations in Diefenbaker’s hand throughout this series.

This series contains photographs and slides belonging to John Diefenbaker and his family. It includes many professional portraits of Diefenbaker and his second wife Olive. There are some historic photographs collected as a result of Diefenbaker’s interest in Canadian history and Sir John A. Macdonald.

This series contains scrapbooks of press clippings, photographs, printed ephemera, and letters compiled by Diefenbaker and his staff.

This series contains posters, used mostly in John Diefenbaker’s political campaigns.

This series contains the press releases issued when Diefenbaker was Prime Minister and Leader of the Opposition (1963-1967).