This fonds contains material relating to the personal and professional life of Luise Herzberg, including materials relating to her childhood and schooling; family documents; materials relating to her parents, Paul and Elsbeth Oettinger, correspondence with her sister, Lotte Thurnauer; and materials received or collected by her son Paul Herzberg. The fonds contains substantial material relating to Luise’s scientific work, including correspondence with international colleagues, and reprints of her articles.

This fonds contains material relating to the personal and professional life of Gerhard Herzberg and his wife, Luise Herzberg. In particular, it contains correspondence with family, friends and colleagues, most notably from the period 1933-1949. Some articles are included.

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.