Fonds consists of 45 glass-plate lantern slides featuring scenes from Osterhout's work with B.C. First Nations, including Haida, Tsimshian and Kwakwaka'wakw. Images document First Nations individuals, communities, totem poles and landscapes of British Columbia.

File contains images of Tsimshian artifacts housed in museums in British Columbia and in what is now known as the Canadian Museum of History. The file also contains images of Tsimshian villages along the Nass River, and historical photos of Tsimshian peoples.