Fonds comprises the records of William Edward Maclellan and his family's records, including those of including William Edward and Margaret Jane (Mackenzie) Maclellan; Edward Kirkpatrick and Helen Stewart (Mackay) Maclellan; Robert (Bob) William and Delphine Caroline (Wallace) Maclellan; Jean Stewart Maclellan; Robert William Maclellan; and David Kirkpatrick Stewart Maclellan. Record types include correspondence, photographs, films, newspaper clippings, poems, certificates, booklets, periodicals, notebooks and genealogical charts.
Fonds consists of Patricia Monk's records regarding the research and writing process of her book The Gilded Beaver: An Introduction to the Life and Work of James De Mille (Toronto: ECW Press, 1991). Fonds includes photographs, correspondence, research notes, transcripts, and other textual records.
Fonds contains correspondence, musical scores (piano and orchestral), photographs, a sketch, harmony notebooks, fliers, programs, newspaper clippings, academic journals, a press book, scrapbooks, and letters of composers. The musical scores include several first edition copies and autograph manuscripts. All personal correspondence is incoming correspondence; no outgoing correspondence is included in this fonds.