Walter S. Bowman (1865-1938) was a professional photographer who worked in Pendleton, Oregon, from the late 1880s to the mid 1930s. Bowman's photographs document daily life in Eastern Oregon, including special events such as the Pendleton Round-Up. The collection consists of almost 800 negatives and prints representative of the span of the photographer's work, but his noted images of tribal people were largely destroyed after his death.
Alfred Cooper Shelton (b. 1891) was a zoological student and assistant at the University of Oregon from 1915-1917, and author of "Distributional List of the Land Birds of West Central Oregon." The collection consists of 317 prints, 285 nitrate negatives, and six glass images, documenting landscape and wildlife in California, Oregon, and Africa.