Julius Wendt, and his brother, worked out of Albany, New York around 1900. For a time his company was also known as the International Association Stereo Division. He produced mainly local scenery, genre and some New York City views. Other areas seen stereoviewed by Wendt include Ohio, Florida, and Calgary, Alberta. Later the company changed its name to Wendt Brothers and expanded their coverage to include the Pan American Expo, Niagara Falls, and night photography.
The only Yellowstone views known are all credited to Julius Wendt (not Wendt Brothers). Notice the word "Calf" that proceeds each title. It seems that Wendt was using photographs taken by H. B. Calfee, and this was his way of crediting Calfee.
Angel Terrace Yellowstone Park