File contains correspondence with interviewees.

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 a number of inscribed chapbooks (Flute, Grey Knitting, White Comrade), some newspaper clippings pertaining to Katherine Hale, and a number of inscribed books to Marie McPhedran from Katherine.

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

Fonds consists of a copy of "Our Heritage from the Ancient World", a report produced by the Evaluating Committee, looking at the experimental program undertaken at Lundy's Lane Public School, Fort Henry Heights, Kingston, Ontario.

Fonds consists of material relating to David Young's research for his history of the Research Division of Ontario Hydro.