This fonds documents the career of Douglas Schmeiser, notably his work as a constitutional advisor both in Canada and internationally; his work with the Law Reform Commission of Saskatchewan, as well as his study of judicial independence and judicial compensation; and his work on human rights.

This fonds contains materials relating to Gruen's academic research in applied mycology and botany, and documents his personal interest in Japan, in philately, and on the uses of fungi as tinder for early methods of fire making. It contains personal correspondence, including diaries; as well as material documenting his early life and education.