The Robert E. Kelly Collection includes a Northern Pacific Railroad Company Annual Report from 1881, 15 Northern Pacific track profiles from Montana, a Great Northern Railway Company (U.S.) book of Authorization for Expenditure from 1916-1956 for locations in Washington state, 5 books on James J. Hill, a copy of the 1948 Railway Engineering & Maintenance Cyclopedia - Track, Bridges, Water Service, Buildings, Signals. It also includes the books: "Railroads of Hawaii", "Puget Sound Electric Railway", "Empire Dreams", "The Early History of Transportation in Oregon", and "Great Northern Railway - Postwar Passenger Trains"; and 22 Inland Empire Historical Society calendars from 1976 to 2002. Later accruals added binders of Great Northern Railway Company photographs, Great Northern Railway station maps and other maps, Great Northern Railway documents and drawings, materials on the avalanche on the Great Northern Railway at Wellington, Washington, research materials on the Great Northern Railway Stevens pass rail line, a copy of "The Camas Prairie - Idaho's Panhandle Railroad", computer discs of oral history, copies of six books - "The Great Northern Railway - Kettle Falls, Washington Branch", "Rocky's Rail - A Spokane Division Trainman, 1960-2004", and "We Never Drove the Last Spike", "Remembering When", "Stevens Pass-Gateway to Seattle", "The Great Northern Railway Through Time", and state transportation maps for Oregon, Washington, Idaho, Montana, North Dakota, South Dakota, Minnesota, northern California showing transportation zones.