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.
Fonds consists of ledgers, journals, lumber records, letter books, correspondence, contracts and agreements and miscellaneous material relating to the timber-making, rafting, forwarding, shipbuilding, towing and salvaging of the Calvin Company. There is also a collection of photographs relating to both family and business.
The fonds consists of correspondence, manuscripts, typescripts, galley proofs, author files, financial and other business records. Author files deal with all aspects inherent within the publication of that author's manuscript. The reseacher is able to trace the development and the forces that come to bear upon the publication, from the initial submission of a manuscript to the ultimate printing and sale of that manuscript. Manuscripts, typescripts, galley proofs and press proofs of most published manuscripts are included in the fonds.
Fonds consists of various Queen's University forms and programmes; and slides of football games, buildings, and other events on campus, plus the Ban Righ House Council (1952-1953), while both Robert Greggs and Robin Howland were students.
The fonds consists of photographs and albums of the Constantine, Carruthers, and other related families, and includes images of the Kingston area and Winnipeg.