Fonds consists of Thomas Cantley's materials accumulated and sometimes annotated by Catherine Campbell in the course of her research on Cantley's life, including correspondence regarding his political and professional activities; correspondence with family members; manuscripts and typescripts; speeches; photographs; financial statements; and other textual records. Fonds also contains records originating with Cantley's family, including correspondence between his children Charles L. Cantley and Marian Cantley, and a letter from Donald F. Cantley to E.W. Sutherland.
File contains correspondence between Thomas Cantley and persons including Sam Hughes, Robert Drummond, Justice Harris, Brandram & Henderson Limited, Baron Beaverbrook, Max Aitken, Alan Dawson, George Grant, Maximilian Groten, R.H. Graham, Rev. J.A. Greenlees, Mrs. J.D. Fife, L.M. Fortier, Osborne Holmden, Harold C.E. Spence, E.M. MacDonald, R.B Bennett, A.J. Crockett, L.H. MacKenzie, A.M. Ferguson, J.E. Nutter, A. Andrew Merrilees, Perry F. Rockwood, James T. Thompson, and F.A. Harrison.
Fonds comprises the records of William Edward Maclellan and his family's records, including those of including William Edward and Margaret Jane (Mackenzie) Maclellan; Edward Kirkpatrick and Helen Stewart (Mackay) Maclellan; Robert (Bob) William and Delphine Caroline (Wallace) Maclellan; Jean Stewart Maclellan; Robert William Maclellan; and David Kirkpatrick Stewart Maclellan. Record types include correspondence, photographs, films, newspaper clippings, poems, certificates, booklets, periodicals, notebooks and genealogical charts.