The Robert Grove Collection consists of 6 glass plate negatives and 9 prints taken from 2 of the negatives. 4 negatives are scenes woodland scenes near Mount Rainier, 1 is of a railroad tunnel of the Northern Pacific Railroad Company, and 1 is an unidentified town with Mt. Rainier in the background.
The Robert Hundman collection includes railroad-related hardbound books, softbound books, equipment diagrams, photos, engineering drawings, railroad hobby publications and railroad history organization publications.
The Robert Hutchison Collection is comprised of railroad and model railroad magazine issues, Union Pacific calendars, posters and a map, and two recordings on 33 1/3 rpm vinyl of railroad sounds.
The Robert Lowry Collection is comprised of 43 photos of a variety of railroad subjects, postcards, 2 Northern Pacific car diagrams, timetables for the Burlington Northern and Chicago, Burlington and Quincy railroads, and the book Spokane, Portland & Seattle Color Guide to Freight and Passenger Equipment by Ed Austin.
The Robert Melbo Collection includes Interstate Commerce Commission accident report covering Northern Pacific Railroad Locomotive 5105 at Willis, Montana 7/7/1938.
The Robert Prior Collection consist of 4 Nothern Pacific brochures on the North Coast Limited passenger train, Yellowstone National Park, and the Pacific Northwest. It also includes Cartan's Canadian Rockies brochure.
