On board Northern Pacific passenger train number 4, the eastbound Alaskan, in the Rocky Mountains on August 19, 1949. Looking from rear of train forward to mail cars and steam locomotive, crossing viaduct, the train has been detoured off its normal route via Helena and is running via Butte and Homestake Pass. Photo by J.M. Fredrickson. Other Subject Classes: passenger train, steam locomotive, bridge, mountains

On board Northern Pacific passenger train number 4, the eastbound Alaskan, in the Rocky Mountains on August 19, 1949. Looking from rear of train forward to mail cars and steam locomotive, the train has been detoured off its normal route via Helena and is running via Butte and Homestake Pass. Photo by J.M. Fredrickson. Other Subject Classes: passenger train, passenger car, steam locomotive, mountains

Northern Pacific steam locomotive 1814 at Butte, Montana, on August 19, 1949. Number 1814 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 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 25 at Butte, Montana, on May 09, 1958. Number 25, a class Y-1 built by Schenectady in 1899, is being moved into place on its display track at Butte. Photo by Ron V. Nixon, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, display

Northern Pacific steam locomotive 25 at Butte, Montana, on May 09, 1958. Number 25, a class Y-1 built by Schenectady in 1899, is being moved into place on its display track at Butte. Photo by Ron V. Nixon, J.M. Fredrickson collection. Other Subject Classes: steam locomotive, display

Northern Pacific steam locomotive 28 at Butte, Montana, on August 16, 1949. Number 28, a class Y-1 built by Schenectady in 1899, switches a passenger consist. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, passenger car, railroad crew

Northern Pacific steam locomotive 29 at Butte, Montana, on August 19, 1949. Number 29 was built as a class Y-1 by Schenectady in 1899. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, wood box car, freight yard

Northern Pacific steam locomotive 29 at Butte, Montana, on August 19, 1949. Number 29 was built as a class Y-1 by Schenectady in 1899. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, wood box car, freight yard

Northern Pacific steam locomotive 35 at Butte, Montana, on August 19, 1949. Number 35, a class Y built by Schenectady in 1898, is coupled to a Burlington Route stock car in the yard. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, freight yard, stock car