An unidentified 0-4-0 steam locomotive number 107, coupled to two loaded log cars on a curved trestle, circa 1925, in an unknown location. Photo from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, logging locomotive, log train, trestle bridge.

The crew pose around an unidentified Heisler steam locomotive number 1 at an engine facility, circa 1925, likely in western Washington. Photo from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, geared locomotive, logging locomotive, railroad crew

The crew pose with an unidentified two-truck, Climax steam locomotive number 1, circa 1925, at Wieser, Idaho. Photo from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, geared locomotive, logging locomotive, railroad crew

Unidentified three-truck, Lima Shay steam locomotive number 1 parked in Portland, Oregon, in 1967. Photo by J.M. Fredrickson. Other Subject Classes: steam locomotive, geared locomotive, logging locomotive.

Unidentified Climax steam locomotive hauling a donkey-engine on a flatcar, circa 1925, likely in western Washington. Photo from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, geared locomotive.

Unidentified Baldwin 2-6-0 steam locomotive number 82, coupled to a loaded flatcar in an unknown location, circa 1925, with a similar operation in the distance. Photo from J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, flatcar.

Builder photo of Construction Number 1258 showing right side of Trout Creek Logging Company, Limited 26 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, July 1912. This locomotive was used for logging near Trout Creek, Ontario.

Builder photo of Construction Number 1346 showing right side of T.R. Miller Mill Company, Incorporated 53 Ton Two Truck Heisler Geared Steam Locomotive Number 7 at Erie, Pennsylvania, September 1916. This locomotive was used for logging near Brewton, Alabama.

Builder photo of right side of Construction Number 1481 showing Tombigbee Logging Company 32 Ton, Two Truck Heisler Geared Steam Locomotive Number 9 at Erie, Pennsylvania, March 1923. This locomotive was used for logging near Jackson, Alabama.

Builder photo of Construction Number 1323 showing right side of 36 inch gauge Tionesta Valley Railway 47 Ton Two Truck Heisler Geared Steam Locomotive Number 18 at Erie, Pennsylvania, April 1916 while in the shops of Heisler. This locomotive was used for logging near Sheffield, Pennsylvania.