This fonds contains material related to the Mapletoft family, Fort Pitt, Frenchman's Butte and Onion Lake areas, the First Nations, the Métis, the Northwest Rebellion and the Little Pipestone Ranch and Simmental cattle.

This collection contains an audio tape interview with Harrington from September 1975, covering his early life and career. [Note: a second tape from this session is missing, although there is a brief summary of the the topics covered]. Other items in the collection are a 1924 University of Minnesota Commencement Programme and Harrington's Ph.D. degree.