The collection consists of material related to William Lyon Mackenzie King. It includes publications and correspondence created by King, and other material about King.
Series 1 - C. Mortimer Bezeau Papers contains letters between King and his friend Charles Mortimer Bezeau (1871-1964), Liberal party member and mayor of Kitchener in 1931-1932. Letters from King are originals, and letters to King are copies. Some of the letters are written by King's private secretaries. Also contains correspondence between Bezeau and the CBC regarding a documentary about King. This series includes issues of Kitchener newspapers The Dawn, The Sunset and the Weekly Advertiser, which may have been published by Bezeau.
Series 2 - Hoffman Papers contains letters between King and Mrs. Hoffman (later Mrs. Heather). The letters are related to Hoffman renting her house to King and several other personal greeting letters. Includes correspondence and graphic material, including postcards and photographs. Letters from King are originals, and letters to King are copies.
Series 6 - Newton W. Rowell papers contains correspondence between King and N.W. Rowell, Liberal Party member and former MPP. The letters are strictly related to the political atmosphere in Canada in 1926. Letters from King are originals. Letters to King are copies.