The fonds consists of the following microfilmed series of King Papers: Primary correspondence (J1), 1889-1950; Memoranda and notes (J4), 1887-1950; Speeches (J5), 1899-1950; Family correspondence (J7), 1880-1950; Spiritualism (J9), 1919-1950; and Diaries (J13), 1893-1950. Also included is a series of original press clippings (1935-1951) amassed and retained by Mackenzie King.
The fonds consists of photostats of correspondence, biographical data, a proclamation (reproduction) and newspaper clippings. Correspondents include Charles Jones, A.N. Buell and Henry O'Reilly. Includes a petition from Mackenzie to William H. Seward, 1840 Jan. 4.