Combest photographed the Treadwell mine, Juneau and sites in southeast Alaska including Speel River and Snettisham. He also photographed the 1911 Valdez flood, Copper River & Northwestern Railway, and the Wrangell Mountains. There are a few views of Canada including the White Pass & Yukon route. The collection includes some photographs by Alaskan photographers Elbridge Merrill, L.H. Pedersen and others.