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 correspondence, lists, card files, photographs, photographic negatives, and clippings regarding those alumni, graduates, students, and staff who served and/or died during World War One and World War Two, and whose names were memorialized in the Union's War Memorial Room. Also included are minutes of the Student's Memorial Union Council 1922-1966; blueprints; ledger, photographs, and press clippings. The 10th Field Company Canadian Engineers series also includes material from 10th Batallion Canadian Engineers after it was formed from the 10th Field Company Canadian Engineers and detachment from the 124th Batallion (G.G.B.G.) 4th pioneers, 2nd Tunnelling Company Canadian Engineers and 14th Field Company Canadian Engineers.
Fonds consists of photographs of the family of James Lester Willis Gill; and an article published by A. Zimmerman entitled, "Professor Gill's Flying Machine." Also includes audio recordings from performances in Kingston as recorded by CKWS and CFRC.
The fonds consists of five series of household and personal invoices, 1925-1953, of Professor Oliver Tiffany Macklem and Mrs. Katherine Bermingham Macklem, and a letter pressbook of business correspondence 1882 of Cornelius Bermingham and James Harty of Canadian Locomotive Company. There is also a collection of family photographs and a scrapbook with infant's Queen's tricolour sweater.
