Fonds consists of photocopies of 90 letters written by Mary Williamson home to her parents from summer camp between 1940 and 1951. The camps attended were Camp Cedarnook and Camp Tanamakoon. Also included are camp badges; one group photograph taken at Camp Cedarnook ca.1943; and ca.160
Materials added in 2020: 8 photographs pertaining to Camp Woapak, 1940s. Mary Williamson's brother, J. Peter Williamson, and their mother, Marie Williamson, are identified in a few of the photographs. Further information about the family is available in Just a Larger Family (Waterloo: Wilfrid Laurier U.P., 2011); this book is comprised of the wartime letters of Marie Williamson and was edited by Mary F. Williamson.