This fonds consists of correspondence, documents, and manuscripts. Included are personal letters, articles, essays, journals and daily planning books, research notes, drafts of books and plays in manuscript form (including an unpublished first novel), royalty statements, photographs and documentation on the novelizations of the films "Corvette Summer," "Dragonslayer," "Batteries Not Included," and "Willow". Also included are materials regarding the film, "Places Out of Time."

Fonds consists of maps and plans of the Ottawa and Haliburton areas, time-books of Bronsons and Weston logging firm, and photographs of the building of a railway, and of the Haliburton area. Included also are research material and manuscripts relating to books which Harley R. Cummings wrote about schools in the Ottawa area, and on the history of Haliburton. Included are notes on John Strachan and a transcript of his diary. The fonds also includes several genealogical charts of the MacCallum family.