This collection contains considerable material relating to aviation history, particularly in western and northern Canada, including material on: the Keng Wah Aviation School for Nationalist Chinese pilots; the RCAF; illustrations of the technology of flight; reference material; and microfilms of the Hudson Strait Expedition fonds (1927-1928) and "The Bulletin" (Western Canada Airways, 1929-1937). Additionally, there is material on Tweddell's other research interests, notably aerial mapping and surveying.

This fonds consists of material relating to Ridgway's military service, his scholarly research concerning the work of Voltaire and Chamfort particularly, his career with the University of Saskatchewan, and his work on internal university committees, professional associations, external agencies (such as Canadian University Service Overseas and the Saskatoon Symphony Board), as well as materials relating to his classes and lectures.

Returned men of World War II seated and standing in Engineering Building.