The fonds consists of John Leslie's family and business correspondence, and real estate ledger; Jack Leslie's election papers, correspondence, speeches, invitations and conference papers; photographs of the family and of functions attended by Mayor Leslie; and Jean Leslie's genealogical sketches, historical articles, research files and interviews. Includes recorded interviews with Helen Yule about the EP Ranch, John James Saucier, Jack Grogan, Carl Cummer, Dudley Batchelor, Mrs. Leinweber, Mary Dover, Archdeacon Swanson, Sidney Vallance, A.G. Graves, Isobel Newton, Judge Thorson, Tom Dorchester, Ron Glass, Tom Glass, Kelly Sutherland, Gary Dorchester, Clarence Mack, Art Briars, Sadie Briars, James M. Wardle, and "Harry" who was involved in the construction of the Banff Windermere Highway.