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 contains the personal correspondence, office, and research files of the Murray family, including W.C. Murray (President, University of Saskatchewan), his wife Christina, and his daughters, Christina, Dr. Lucy H. Murray (Professor of English, Regina College), and Dr. Jean E. Murray.

This fonds contains materials relating to the professional and academic activities of Dr. Regehr. It includes considerable materials relating to his published works; and also extensively documents his University committee work.