Northern Pacific steam locomotive 1372 at Lewiston, Idaho, on May 10, 1950. Number 1372 is a class S-4 built by Baldwin in 1902. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 1539 near Lewiston, Idaho, on May 10, 1950. Number 1539 is a class W built by Alco-Brooks in 1905. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 2222 at Lewiston, Idaho, on May 10, 1950. Number 2222 is a class Q-4 built by Alco-Schenectady in 1910. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 244 at Lewiston, Idaho, on June 15, 1947. The engineer of Number 244, a class P-2 built by Schenectady in 1901, looks back as he prepares to leave. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, railroad crew

Northern Pacific steam locomotive 244 at Lewiston, Idaho, on June 15, 1947. Number 244 is a class P-2 built by Schenectady in 1901. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive in roster photo

Northern Pacific steam locomotive 3101 at Wallace, Idaho, on September 25, 1916. Number 3101 is a class Z-1 built by Baldwin in 1910. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo

Northern Pacific 4025, a class Z-3, leads an eastbound extra freight across a trestle near Dorsey, Idaho, east of Wallace, on May 28, 1952. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, trestle bridge.

Northern Pacific 4025, a class Z-3, leads an eastbound extra freight across the high bridge at Dorsey, Idaho, east of Wallace, on May 28, 1952. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train, trestle bridge.

Northern Pacific 4025, a class Z-3, leads an eastbound extra freight through Mullan, Idaho, east of Wallace, on May 28, 1952. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight train.

Northern Pacific steam locomotive 93 at Wallace, Idaho, on September 23, 1916. Number 93 is a class F-4 built by Grant in 1887. Photo by Charles R. Iles, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, roster photo