Northern Pacific steam locomotive 2320 poses for a roster photo in 1916. Number 2320 is a class T built by Alco-Brooks in 1906. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 232 leads a passenger train, circa 1915. Number 232 is a class P-1 built by Schenectady in 1899. J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 232 at East Auburn, Washington, in 1920. The crew of Number 232, a class P-1 built by Schenectady in 1899, pose with their locomotive at the East Auburn station platform. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, passenger depot, railroad crew

Northern Pacific steam locomotive 2318 poses with its crew and a freight train, circa 1910. Number 2318 is a class T built by Alco-Brooks in 1906. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, roster photo

Northern Pacific steam locomotive 2315 at Staples, Minnesota, on April 28, 1950. Number 2315 is a class T built by Alco-Brooks in 1906. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 2315 at Livingston, Montana, on August 18, 1949. Number 2315 is a class T built by Alco-Brooks in 1906. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 23 at Helena, Montana, on September 15, 1953. Number 23, a class Y-1 built by Schenectady in 1899, awaits its next switching assignment at the roundhouse. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, water column

Northern Pacific steam locomotive 23 at Helena, Montana, on May 24, 1952. Number 23, a class Y-1 built by Schenectady in 1899, backs by the depot. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, passenger depot

Northern Pacific steam locomotive 23 at Butte, Montana, on August 19, 1949. Number 23, a class Y-1 built by Schenectady in 1899, passes through the yard. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight yard

Northern Pacific steam locomotive 227 at Seattle, Washington, on September 11, 1935. Number 227, a class P built by Schenectady in 1898, is parked near the Seattle roundhouse. Photo by Herman Hunt, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo