Map of the Northern Pacific Railroad, and connections, 1881
Map of the Northern Pacific Rail Road and connections, 1885?
Oregon branch of the Pacific Railroad, circa 1868
Colton's map of Oregon & Washington Territory / issued by the Oregon Railway and Navigation Co., 1879
Map and Short Story of the PNW, Embracing Oregon, Washington and Idaho, 1904
Map, showing lines under construction and proposed routes and connections
East & Portland Oregon, Union Pacific Map, 1904