Fonds consists of correspondence; subject files; articles, book and exhibition reviews; lecture notes; conferences, symposia, and colloquia attended, persented at, or put on; exhibitions mounted; research files relating to Van Gogh and Paul Gogin; transperiencies; and electronic records.

Fonds consists of correspondence, journals, speeches, lecture and research notes, publications; subject file relating to the Defence Research Board and Privy Council of Canada; reports, material relating to the Radioactive Waste Disposal Research Project; background material, submissions, reports relating to various Royal Commissions including the Royal Commission on Matters of Health and Safety Rising from the Use of Asbestos in Ontario, and the Ontario Commission on Truck Safety.

The fonds consists of correspondence, notebooks, research papers and reprints of articles by friends and colleagues. Of particular note is correspondence with Sir Ernest Rutherford, 1908-1937. Also included are Gray's stamp collection and a ledger kept by W.M. Herchmer and John R. Forsyth for the estate of Major Alexander Forbes, army officer, Kingston, Ontario. April 1851-1852, and notes on Forbes' military career made by Professor J.D. Forbes, that was acquired and retained by Gray.

This fonds consists of correspondence (1952-2005); editorials in British papers (1946-1950) and the 'Winnipeg Free Press' (1950-1960); subject files relating to his time as advisor to the Liberal Party and Prime Minister Lester B. Pearson; notes on the development of social policy and the Canada Pension Plan; papers and lectures written by Kent; published articles and volumes; presentations to parliamentary committees; files relating to the Royal Commission on Newspapers (1980-1981); honours and awards.

The fonds consists of correspondence between Margaret Sparling Mills and George Whalley.