This fonds consists of records and photographs of William Thomas Carlyle. The records include correspondence, financial statements, and reports relating to his participation as a director of the Alberta Society for the Prevention of Cruelty to Animals (SPCA) and its Northern Alberta branch, and a tribute to Hugh Alton MacGregor, written for the Edmonton Natural History Club and the Federation of Alberta Naturalists. Photographs consist of urban and rural scenes in and around Edmonton, including photographs taken under the New Horizons Project