This fonds consists of notes, record books, and reports concerning Rawson's limnological research: particularly his studies done in Prince Albert National Park (1928-1934); the national parks areas of the Rocky Mountains (1935-1941); Riding Mountain National Park; Reindeer, Athabasca, and Great Slave Lake; and Lac La Ronge, Amisk Lake, and the Churchill drainage system (1942 onward). Additionally, there is considerable correspondence with a number of Rawson's colleagues and with various national organizations. The fonds also includes speeches, maps, and lecture notes. There are also photograph albums which contain family images, images of research trips, and of various flora and fauna.