The fonds consists of transcriptions of 19 volumes of diaries written by Rev. MacLean, dating from July 1, 1930, through September 14, 1954. Diary entries are generally brief accounts of daily activities, weather and related events, mostly in Saskatchewan (Wilcox, Raymore) and Manitoba (Arden, Deloraine, Winnipeg). Contents were transcribed by Margaret MacLean, from the original diaries.

Also included is an introduction to the transcribed diaries, by Margaret MacLean, and letters providing background to Rev. D.A. MacLean, his diaries, and the transcription project itself (1991-1992).