This addition to the fonds consists of articles and booklets written by Frank Morris; manuscripts and published articles by Douglas Sadler; correspondence, minutes of meetings relating to Sadler's involvment in environmental and naturalist issues and activities; correspondence relating to Teacher's College and several issues of the Young Naturalist.

This fonds consists of the family and personal papers of William Hamilton Munro, his brothers Reid and Alan and his sister Effie. The materials in the fonds make reference to World War I; Peterborough County; hydro-electric companies in Canada and the third world; photographs, postcards, maps and plans of the Trent Canal; City of Peterborough; and locations in Bolivia, Europe and North America.