Collection consists of 6 plans on 4 sheets of the sternwheel steamer Hassalo. The drawings include a side view; a plan of the freight deck; a lines plan; and a cross section. It is unknown whether the plans are original or are later reproductions.

Typescript recollections of Stanley D. Young, 17 pages, 1950, of life on steamboats on the lower Columbia River, particularly the steamers Lurline and Hassalo, during the 1910s.