The papers of Clifford M. Drury include correspondence, research files, newspaper clippings, photographs, and manuscripts, from 1922- 1984, specifically regarding his works on Marcus Whitman and other early Pacific Northwest missionaries. Clifford Merrill Drury had a noteworthy career as a pastor, seminary professor, historian, and Navy chaplain.

Dr. Clifford M. Drury was a pastor and notable author and historian on the West Coast between the 1920s and 1980s. The A. Wilfred and Verna Welch Letters from Clifford M. Drury houses letters from Dr. Clifford M. Drury, and later Joyce and Dean Drury, to Arthur Wilfred and Verna Welch of Walla Walla regarding the publication of several of his books.