The Chinese in Walla Walla Collection contains materials related to the Chinese population of Walla Walla, Washington.

The Morda C. Slauson Collection on William Polk Gray, which dates from 1891 to 1968, collection contains correspondence, writings, and photographs of early Washington resident and steamboat Captain William Polk Gray.

This collection contains the papers of Morda Coleman Slauson, playwright, author, and columnist, who came to Walla Walla from Iowa in 1922 to work as a writer for the Walla Walla Union Bulletin newspaper. Included are newspaper clippings of firsthand accounts from early settlers, and correspondence for her research on Walla Walla and Northwest history.