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.
Leslie D. Howell (1884-1969) was an architect and engineer in the Portland firm of Knighton & Howell. The projects are documented in architectural drawings and photographs, and consist of residences, commercial structures, educational institutions, and state offices, from 1912 to 1952.