The Asa C. Baldwin original photograph collection includes views of the Alaska Canada boundary survey from Demarcation Bay on the Arctic Ocean to Mount St. Elias from 1907 to 1913. The photos were taken by Baldwin while he worked as a surveyor for the U.S. Government on the boundary survey. In addition, the collection contains photos, dated 1916-1942, of the Yellow Band Gold Mine located in Bremner Range near Chitina, McCarthy, Alaska, as well as general Alaskana. There are other photographs of Alaska by photographers F.H. Nowell, E.A. Hegg, E.C. Guerin, T.C. Dennis, and Curtis and Miller depicting life in Alaska. Images include photos in albums, color transparencies, lantern slides as well as loose photos. Additional information is on the back of some photographs.

Documents form a separate collection, MS 36. Some photographs are included in the boundary reports.