Northern Pacific 1842, a class W-5, helps a westbound extra freight at Spokane, Washington, in 1940. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, helper locomotive, wood caboose.

Northern Pacific steam locomotive 1831 at Spokane, Washington, on July 28, 1951. Number 1831 is a class W-3 built by Alco-Brooks in 1920. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 1831 at Spokane, Washington, on May 06, 1950. Number 1831 is a class W-3 built by Alco-Brooks in 1920. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 1794 at Spokane, Washington, on May 06, 1950. Number 1794 is a class W-3 built by Alco-Brooks in 1918. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 1792 at Spokane, Washington, on May 27, 1953. Number 1792 is a class W-3 built by Alco-Brooks in 1918. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 1787 at Spokane, Washington, on May 06, 1950. Number 1787 is a class W-3 built by Alco-Brooks in 1918. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 1729 at Spokane, Washington, on May 27, 1952. Number 1729 is a class W-3 built by Alco-Brooks in 1913. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 1596 at Spokane, Washington, on July 15, 1933. Number 1596, a class W built by Alco-Brooks in 1906, is parked at Spokane. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 1506 at Spokane, Washington, in 1941. Number 1506, a class W built by Alco-Brooks in 1904, poses with an eastbound local freight. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train

Northern Pacific steam locomotive 1254 at Spokane, Washington, on May 27, 1953. Number 1254 is a class Y-2 built by Schenectady in 1901. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo