The Wyoming Sheep Ranch photograph collection consists of 22 large format cabinet photographs mostly of sheep ranching and fishing on the North Platte River in Wyoming, Ogden Canyon, and a camp located near Beaver Creek somewhere in Southern Utah. People identified in the images include Edgar Henry Thornton Sr. and Jr. (as a boy), Mrs. Thornton (Mary Adelaide Yale), Mr. and Mrs. McDowell, Mr. and Mrs. Maison, Louise Maison, and Chas Maison.