Builder photo of Construction Number 1268 showing right 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 1269 showing right side of Sugar Pine Railway 52 Ton Two Truck Heisler Geared Steam Locomotive Number 4 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.

Builders photo of Construction Number 1396 showing right side of Stimson Veneer and Lumber Company 32 Ton, Two Truck Heisler Geared Steam Locomotive Number 15 at Erie, Pennsylvania, June 1919. This locomotive was used for logging near Eagle Nest, Mississippi. Photograph by Schauble. Photograph by Schauble.

Builder photo of Construction Number 1329 showing right side of Stimson Veneer and Lumber Company 26 Ton Two Truck Heisler Geared Steam Locomotive Number 11 at Erie, Pennsylvania, February 1916. This locomotive was used for logging near Mellwood, Arkansas. Photograph by Schauble.

Builder photo of Construction Number 1093 showing right side of Stillwater Lumber Company 22 Ton Two Truck Heisler Geared Steam Locomotive Number 101 at Erie, Pennsylvania in August 1906. This locomotive was used for logging at Little Falls (Vader), Washington. Photograph by Schauble.

Builder photo of Construction Number 1530 showing right side of Stearns Coal and Lumber Company 55 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, April 1926. This locomotive was used for mining coal and logging near Stearns, Kentucky. Photograph by Schauble.

Builder photo of Construction Number 1090 showing right side of Standard Railway and Timber Company 52 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania in March 1906. This locomotive was used for logging at Hazel, Washington. Photograph by Schauble.

Builder photo of Construction Number 1196 showing right side of Standard Lumber Company, Limited 32 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, March 1910. This locomotive was used for logging near Cranbrook, British Columbia. Photograph by Schauble.

Builders photo of Construction Number 1579 showing right side of Standard Fruit Railroad 65 Ton, Two Truck Heisler Geared Steam Locomotive Number 38 at Erie, Pennsylvania, February 1929. This locomotive operated near La Ceiba, Honduras. Photograph by Schauble.

Spokane, Portland & Seattle Railway steam locomotive number 702 at Philadelphia, Pennsylvania, in 1937. The builder's photo of SP&S 702. Photo by Baldwin Locomotive Works, J.M. Fredricson collection. Other Subject Classes: steam locomotive, display.

Builder photo of Construction Number 1504 showing right side of Speer-Harris Lumber Company 32 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, April 1924. This locomotive was used for logging near Norfleet, Florida. Photograph by Schauble.

Builder photo of Construction Number 1540 showing right side of Southwest Lumber Company 70 Ton, Three Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania, January 1927. This locomotive was used for logging near Alamogordo, New Mexico. Photograph by Schauble.

Builder photo of Construction Number 1314 showing right side of 42 inch gauge Southern Lumber and Timber Company 36 Ton Two Truck Heisler Geared Steam Locomotive Number 10 at Erie, Pennsylvania, June 1915. This locomotive was used for logging near Hillsdale, Mississippi. Photograph by Schauble.

Builder photo of Construction Number 1338 showing right side of Solvay Process Company 36 Ton Two Truck Heisler Geared Steam Locomotive Number 44 at Erie, Pennsylvania, April 1916. This locomotive was used for mining near Wyandotte, Michigan. Photograph by Schauble.

Builders photo of left side of Solvay Process Company 50 Ton Two Truck Heisler Geared Steam Locomotive Number 14 at Erie, Pennsylvania, 1930's. This locomotive was used for mining at the Sibley Quarries near Detroit, Michigan. Photograph by Schauble.

Builder photo of Construction Number 1385 or 1386 showing right side of Solvay Process Company 36 Ton, Two Truck Heisler Geared Steam Locomotive Number 10 at Erie, Pennsylvania, February 1919. This is either Construction Number 1385 or 1386 and was used for mining at the Sibley Quarries near Detroit, Michigan. Photograph by Schauble.

Builder photo of Construction Number 1354 showing right side of Snohomish Logging Company 47 Ton Two Truck Heisler Geared Steam Locomotive Number 6 at Erie, Pennsylvania, September 1917. This locomotive was used for logging near Snohomish, Washington. Photograph by Schauble.

Builder photo of Construction Number 1334 showing right side of Snohomish Logging Company 53 Ton Two Truck Heisler Geared Steam Locomotive Number 5 at Erie, Pennsylvania, May 1916. This locomotive was used for logging near Snohomish, Washington. Photograph by Schauble.

Builder photo of Construction Number 1205 showing right side of Smith-McGowin Mill Company 50 Ton Two Truck Heisler Geared Steam Locomotive Number 7 at Erie, Pennsylvania, June 1910. This locomotive was used for logging near Magazine, Alabama. Photograph by Schauble.

Builder photo of Construction Number 1136 showing left side of Smith-McGowin Mill Company 31 Ton Two Truck Heisler Geared Steam Locomotive Number 6 at Erie, Pennsylvania in December 1907. This locomotive was used for logging at Magazine, Alabama. Photograph by Schauble.

Builder photo of Construction Number 1349 showing right side of Smith Powers Logging Company 75 Ton Three Truck Heisler Geared Steam Locomotive Number 8 at Erie, Pennsylvania, October 1916. This locomotive was used for logging near Powers, Oregon. Photograph by Schauble.

Builder photo of Construction Number 1036 showing right front side of California 50 Ton Two Truck Heisler Geared Steam Locomotive Number 9 at Erie, Pennsylvania in December 1899. Some of the early models were built with a water tank over the boiler. Photograph by Schauble.

Builder photo of Construction Number 1036 showing right side of Sierra Railway Company of California 50 Ton Two Truck Heisler Geared Steam Locomotive Number 9 at Erie, Pennsylvania in December 1899. Some of the early models were built with a water tank over the boiler. Photograph by Schauble.

Photo from the side of outside frame truck for Heisler narrow gauge geared locomotive at Erie, Pennsylvania. Photograph by Schauble.

Photo from the side of outside frame truck for Heisler narrow gauge geared locomotive at Erie, Pennsylvania. Photograph by Schauble.

Left side view photo of a Heisler two truck locomotive with a "I" beam type frame with motor installed and waiting for the boiler at Erie, Pennsylvania. Photograph by Schauble.

Right side view photo of a Heisler two truck locomotive with a diamond type frame being assembled with motor installed and waiting for the boiler at Erie, Pennsylvania. Photograph by Schauble.

Right side view photo of a Heisler three truck locomotive with a diamond type frame with motor installed and waiting for the boiler at Erie, Pennsylvania. Photograph by Schauble.

Right side view photo from the rear of a Heisler three truck locomotive with a diamond type frame with motor installed and waiting for the boiler at Erie, Pennsylvania. Photograph by Schauble.

Right side view photo of a Heisler three truck locomotive with a diamond type frame with motor installed and waiting for the boiler at Erie, Pennsylvania. Photograph by Schauble.