The Lindsay Applegate Papers, which date from circa 1929, contains newspaper articles and writings by Lindsay Applegate.

The Cushing Eells Collection, which dates from 1821 to 1979, contains materials of and about Cushing Eells. Eells was a missionary and founded a seminary dedicated to Marcus Whitman, which became Whitman College. The collection contains original correspondence, the diary and the sermons of Cushing Eells, as well as current materials about his life, mission, and some materials created by his family.

The collection consists of personal and family papers of Arminda Fix, the first librarian of Whitman College.

The Ruth Fluno Collection, which dates from 1927 to 1980, contains artwork, poetry, diaries, and other writings of a Walla Walla artist, Ruth Fluno. She and her husband Robert Fluno moved to Walla Walla in 1952; the couple also traveled abroad in London, East Pakistan, Italy, and southern Europe. She considered much of her artwork to be social commentary.