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.
Eugene P. Lyle Jr. (1873-1961) was a journalist and a writer of pulp fiction who resided in Mexico for a number of years. The collection contains correspondence, manuscripts, printed works, subject files, photographs, and the papers of his son, Eugene Lyle III.