Photograph of the S.S. Casca approaching Carmacks pushing a barge, The S.S. Casca was the third Casca and was built at Whitehorse in 1937, by the British Yukon Navigation Co.
Inscription verso: Summer transportation on the Yukon River and main tributaries is by flatbottomed, paddlewheeled steamers. If their loads are large, sometimes they push barges ahead of them. The steamer is approaching Carmacks, Yukon.