Builder photo of Construction Number 1377 showing right side of United States Army Signal Corps 47 Ton, Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, June 1918. This locomotive was provided to the Airplane Spruce & Lumber Company for the logging of spruce logs to provide lumber for military aircraft and was used at Hoquiam, Washington. Photograph by Schauble.

Builder photo of Construction Number 1373 showing right side of United States Army Signal Corps 36 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, May 1918. This locomotive was provided to the Warren Spruce Company for the logging of spruce logs to provide lumber for military aircraft and was used at Yaquina, Oregon. Photograph by Schauble.

Builder photo of Construction Number 1214 showing right side of 36 inch gauge United Engineering and Construction Company 26 Ton Two Truck Heisler Geared Steam Locomotive Number 14 at Erie, Pennsylvania, February 1911. This locomotive was used in work on the barge canal at Lockport, New York. Photograph by Schauble.

Builders photo showing right side of United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 25 at Erie, Pennsylvania, 1929. This locomotive was used for mining coal near Pyatts, Illinois. Photograph by Schauble.

Builders photo showing right side of United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 24 at Erie, Pennsylvania, 1929. This locomotive was used for mining coal near Pyatts, Illinois. Photograph by Schauble.

Builders photo of Construction Number 1585 showing right side of United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 23 at Erie, Pennsylvania, August 1929. This locomotive was used for mining coal near Pyatts, Illinois. Photograph by Schauble.

Builders photo showing right side of United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 22 at Erie, Pennsylvania, 1929. This locomotive was used for mining coal near Pyatts, Illinois. Photograph by Schauble.

Builders photo showing right side of United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 21 at Erie, Pennsylvania, 1928. This locomotive was used for mining coal near Pyatts, Illinois. Photograph by Schauble.

Builders photo showing right side of United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 20 at Erie, Pennsylvania, 1928. This locomotive was used for mining coal near Pyatts, Illinois. Photograph by Schauble.

Builder photo of Construction Number 1529 showing right side of 42 inch gauge United Electric Coal Companies 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 19 at Erie, Pennsylvania, May 1926. This locomotive was used for mining coal near Farmersburg, Indiana. Photograph by Schauble.

Builder photo of Construction Number 1168 showing right side of Union Lumber Company 50 Ton Two Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania in August 1909. This locomotive was used in logging at Union Mills, Washington. Photograph by Schauble.

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. Photograph by Schauble.

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. Photograph by Schauble.

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. Photograph by Schauble.

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. This locomotive was used for logging near Sheffield, Pennsylvania. Photograph by Schauble.

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. Photograph by Schauble.

Builders photo of Construction Number 1409 showing right side of 36 inch gauge Tionesta Valley Railway 40 Ton, Two Truck Heisler Geared Steam Locomotive Number 16 at Erie, Pennsylvania, January 1920. This locomotive was used for logging near Sheffield, Pennsylvania. Photograph by Schauble.

Builder photo of Construction Number 1282 showing right side of Theo. Fathauer Company 23 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, May 1913. This locomotive was used for logging near Helena, Arkansas. Photograph by Schauble.

Builder photo of Construction Number 1086 showing left side of The Tyronza and Saint Francis River Railroad 22 Ton Two Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania in February 1906. This railroad was controlled by theTyronza Lumber Company and was used in logging at Earle, Arkansas. One of the early Heislers equipped with a water tank over the boiler. Photograph by Schauble.

Builder photo of Construction Number 1305 showing right side of 36 inch gauge The Dennis-Simmons Lumber Company 22 Ton Two Truck Heisler Geared Steam Locomotive Number 24 at Erie, Pennsylvania, January 1915. This locomotive was used for logging near Kenley, North Carolina. Photograph by Schauble.

Builder photo of Construction Number 1492 showing right side of Tendal Lumber Company 24 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, July 1923. This locomotive was used for logging near Waverly, Louisiana. Photograph by Schauble.

Builder photo of Construction Number 1281 showing right side of Taylor and Crate 26 Ton Two Truck Heisler Geared Steam Locomotive Number 4 at Erie, Pennsylvania, May 1913. This locomotive was used for logging near Hinchcliff, Minnesota. Photograph by Schauble.

Builder photo of Construction Number 1449 showing left side of 42 inch gauge Taupo Totara Timber Company, Limited 32 Ton, Two Truck Heisler Geared Steam Locomotive Number 9 at Erie, Pennsylvania, January 1921. This locomotive was used for logging near Mokai, New Zealand. Photograph by Schauble.

Builder photo of Construction Number 1448 showing right side of 42 inch gauge Taupo Totara Timber Company, Limited 32 Ton, Two Truck Heisler Geared Steam Locomotive Number 8 at Erie, Pennsylvania, January 1921. This locomotive was used for logging near Mokai, New Zealand. Photograph by Schauble.

Builder photo of Construction Number 1272 showing right side of Sunset Timber Company 85 Ton Three Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, February 1913. This locomotive was used for logging near Raymond, Washington. Photograph by Schauble.

Builders photo of right side of Sunlight Coal Company 50 Ton Two Truck Heisler Geared Steam Locomotive Number 5 at Erie, Pennsylvania, 1928. This locomotive was used for mining coal near Boonville, Indiana. Photograph by Schauble.

Photo of right side of Sunlight Coal Company 50 Ton Two Truck Heisler Geared Steam Locomotive Number 5 with steam shovel loading coal into hopper cars at Boonville, Indiana.

Photo of right side of Sunlight Coal Company 50 Ton Two Truck Heisler Geared Steam Locomotive Number 5 with four loaded coal hopper cars at Boonville, Indiana.

Builder photo of Construction Number 1268 showing left side of Sugar Pine Railway 85 Ton Three Truck Heisler Geared Steam Locomotive Number 5 at Erie, Pennsylvania, November 1912. This company was controlled by the Standard Lumber Company and the locomotive was used for logging near Standard, California. Photograph by Schauble.

Builder photo of Construction Number 1268 showing front of Sugar Pine Railway 85 Ton Three Truck Heisler Geared Steam Locomotive Number 5 at Erie, Pennsylvania, November 1912. This company was controlled by the Standard Lumber Company and the locomotive was used for logging near Standard, California. Photograph by Schauble.