Photographs taken by Mr. Churchill depict placer mining, hard rock gold mining and related activities in 1912, during the Klondike gold rush. Some images document mining engineering practices such as brush retaining walls on streams and thawing of frozen ground to accommodate dredging.

Places depicted include the Klondike River, Yukon River, Treadwell, Douglas, Skagway, Ketchikan, Petersburg, Allard Bay [Alert Bay, B. C.], Bonanza Creek, Y. T., Dawson, Y. T.

Subjects also include totem poles, potlatch, light houses, glaciers, travel by steamships and railroad, and scenes of daily life in the Yukon and Alaska.