Fonds consists of call-up notification postcards (1874-1880) sent by Lieut.-Col. Alex. McKenzie of Barrie, Ontario, to Lieut. John Sutherland of Bond Head, Ontario regarding the Battalion being raised at Barrie for the Northwest Rebellion. Also included are genealogical records related to the Cummings and MacCallum families, a photocopy of a book written by Harley Cummings entitled Cummings-MacCallum: A Tale of Two Families; notes and other materials related to the teaching career of Cummings; three photographs: Hon. Thos. Mackay's Mills, Distillery etc. and part of New Edinburgh, Rideau Falls, New Edinburgh, from Railway Bridge, and an unidentified photo similar to the previous two; and three maps: 1. Ontario Department of Highways Road Map of the Provisional County of Haliburton, 1952 (original); 2. Plan of Part of York River and its Southern Tributaries, Egan's River, Hudson's Creek & Allen's Creek together with the Head Waters of the E. & W. Branches of Crow River & Buckhorn Branch of Ottanabe [Otonabee] River, Tributaries to the St. Lawrence, surveyed by John A. Snow, Hull, 1855 (in four sheets, copied from microfilm); 3. Plan of Part of York River, commencing at the Floodwood Jam, surveyed by John A. Snow, Hull, 1854 (in three sheets, copied from microfilm).

Fonds consists of personal correspondence and R.C.A.F. materials relating to the military career of John Grover. Also included are family history materials, including a family tree, research notes, and typescripts of family letters.