Photo of Construction Number 37 showing right side of Metal and Thermit Corporation 42 ton, 0-4-0 Heisler Fireless Steam Locomotive Number 3 at Carteret, New Jersey, undated.

Photo of Construction Number 37 showing right side of Metal and Thermit Corporation 42 ton, 0-4-0 Heisler Fireless Steam Locomotive Number 3 at Carteret, New Jersey, circa 1939.

Builder photo of Construction Number 1550 showing right side of McRae Lumber and Manufacturing Company 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania, June 1927. This locomotive was used for logging near Quincy, Florida. Photograph by Schauble.

Builder photo of Construction Number 1367 showing right side of 42 inch gauge McLean-Arkansas Lumber Company 22 Ton, Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, December 1917. This locomotive was used for logging near Beirne, Arkansas. Photograph by Schauble.

Builder photo of Construction Number 1299 showing right side of McLean Lumber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania, April 1914. This locomotive was used for logging near Hairston, Alabama. Photograph by Schauble.

Builder photo of Construction Number 1292 showing right side of McLean Hardwood Lumber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, February 1914. This locomotive was used for logging near Minter City, Mississippi. Photograph by Schauble.

Builder photo of Construction Number 1231 showing right side of McLean Hardwood Lumber Company 23 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, July 1911. This locomotive was used for logging near Minter City, Mississippi. Photograph by Schauble.

Builder's photo of McCloud River Railroad Baldwin 2-6-2 steam locomotive number 8 (construction number 18595, built in 1901) at Philadelphia, Pennsylvania. Photo by Baldwin Locomotive Works, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, builder's photo.

Builder's photo of McCloud River Railroad Baldwin 2-6-2 steam locomotive number 8 (construction number 18595, built in 1901) at Philadelphia, Pennsylvania. Photo by Baldwin Locomotive Works, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, builder's photo.

Builder's photo of McCloud River Railroad Baldwin 0-6-6-0T steam locomotive number 6 (construction number 17684-17685, built in 1900) at Philadelphia, Pennsylvania. Number 6 consisted of two 0-6-0 tank locomotives permanently coupled back to back. Photo by Baldwin Locomotive Works, J.M. Fredrickson Collection. Other Subject Classes: steam locomotive, builder's photo.