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 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 1535 showing right side of Mid-Continent Coal Corporation 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, September 1926. This locomotive was used for coal mining near West Clinton, Indiana. Photograph by Schauble.

Builder photo of Construction Number 1536 showing right side of Mid-Continent Coal Corporation 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, October 1926. This locomotive was used for coal mining near West Clinton, Indiana. Photograph by Schauble.

Builder photo of Construction Number 1536 showing right side of Mid-Continent Coal Corporation 42 Ton, Two Truck Heisler Geared Steam Locomotive Number 4 at Erie, Pennsylvania, January 1927. This locomotive was used for coal mining near West Clinton, Indiana. Photograph by Schauble.

Builder photo of Construction Number 1494 showing right side of 42 inch gauge Midland Saw Milling Company, Limited 24 Ton, Two Truck Heisler Geared Steam Locomotive, No Number, at Erie, Pennsylvania, January 1924. This locomotive was used for logging near Camerons, New Zealand. Photograph by Schauble.

Builder photo of Construction Number 1223 showing right side of Milwaukee Lumber Company 60 Ton Two Truck Heisler Geared Steam Locomotive Number 4 at Erie, Pennsylvania, April 1911. This locomotive was used for logging near St. Maries, Idaho. Photograph by Schauble.

Builder photo of Construction Number 1114 showing right side of Mining, Logging and Timber Company 52 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania in January 1907. This company never existed and was applied to this locomotive for dealer J.G. Smith at Seattle, Washington. It was later sold to the Pacific Logging and Timber Company at Dungeness, Washington. Photograph by Schauble.

Builder photo of Construction Number 1161 showing right side of Mississippi, Arkansas and Western Railway 23 Ton Two Truck Heisler Geared Steam Locomotive Number 11 at Erie, Pennsylvania in June 1909. This locomotive was controlled by the Bliss-Cook Oak Company and was used to haul logs near Blissville, Arkansas. Photograph by Schauble.

1.5 inch scale model of a Heisler geared locomotive built for display at the 1915 Panama-Pacific International Exposition at Erie, Pennsylvania. Photograph by Schauble.

1.5 inch scale model of a Heisler geared locomotive built for display at the 1915 Panama-Pacific International Exposition with Heisler General Manager George L. Swabb at Erie, Pennsylvania. Photograph by Schauble.

1.5 inch scale model of a Heisler geared locomotive built for display at the 1915 Panama-Pacific International Exposition with Heisler General Manager George L. Swabb to the right at Erie, Pennsylvania. Photograph by Schauble.

1.5 inch scale model of a Heisler geared locomotive truck posed next to an actual truck with Heisler General Manager George L. Swabb at Erie, Pennsylvania. Photograph by Schauble.

Builder photo of Construction Number 1251 showing right side of Moline Lumber Company 20 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, May 1912. This locomotive was used for logging near Malvern, Arkansas. Photograph by Schauble.

Builder photo of Construction Number 1511 showing right side of 36 inch gauge Morrison, Gross and Company 24 Ton, Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, October 1924. This locomotive was used for logging near Wallman, Maryland. Photograph by Schauble.

Builder photo of Construction Number 1190 showing right side of Mountain Timber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 103 at Erie, Pennsylvania in February 1910. This locomotive was used in logging near Kalama, Washington. Photograph by Schauble.

Builder photo of Construction Number 1209 showing right side of Mountain Timber Company 26 Ton Two Truck Heisler Geared Steam Locomotive Number 104 at Erie, Pennsylvania, October 1910. This locomotive was used in logging near Kalama, Washington. Photograph by Schauble.

Builder photo of Construction Number 1212 showing right side of Mountain Timber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 105 at Erie, Pennsylvania, May 1911. This locomotive was used in logging near Kalama, Washington. Photograph by Schauble.

Builder photo of Construction Number 1340 showing right side of 42 inch gauge Mowbray and Robinson Company 53 Ton Two Truck Heisler Geared Steam Locomotive Number 8 at Erie, Pennsylvania, June 1916. This locomotive was used for logging near Quicksand, Kentucky. Photograph by Schauble.

Builder photo of Construction Number 1456 showing right side of National Soapstone Company 22 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, February 1922. This locomotive was used for mining soapstone near West Jefferson, North Carolina. Photograph by Schauble.

Builder photo of Construction Number 1286 showing right side of Native Lumber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, September 1913. This locomotive was used for logging near Howison, Mississippi. Photograph by Schauble.

Builder photo of Construction Number 1152 showing rear of Nelson-Neal Lumber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 7 at Erie, Pennsylvania in January 1909. This was used for logging out of Bryant, Washington. Photograph by Schauble.

Builder photo of Construction Number 1152 showing front of Nelson-Neal Lumber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 7 at Erie, Pennsylvania in January 1909. This was used for logging out of Bryant, Washington. Photograph by Schauble.

Builder photo of Construction Number 1152 showing right side of Nelson-Neal Lumber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 7 at Erie, Pennsylvania in January 1909. This was used for logging out of Bryant, Washington. Photograph by Schauble.

Builder photo of Construction Number 1154 showing right side of New York and Pennsylvania Redwood Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania in February 1909. This was used for logging redwood out of Hardy, California. Photograph by Schauble.

Builder photo of Construction Number 1188 showing right side of Nibley Lumber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, September 1910. This locomotive was used in logging near Meacham, Oregon. Photograph by Schauble.

Builder photo of Construction Number 1423 showing right side of Nickey Brothers, Incorporated 22 Ton, Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, January 1920. This locomotive was used for logging near Link, Arkansas. Photograph by Schauble.

Builder photo of Construction Number 1285 showing right side of North Bend Lumber Company 62 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, September 1913. This locomotive was used for logging near North Bend, Oregon. Photograph by Schauble.

Builder photo of Construction Number 1181 showing right side of North Texas Lumber Company 26 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania in January 1910. This locomotive was used in logging near Kildare, Texas. Photograph by Schauble.

Builder photo of Construction Number 1249 showing right side of North Texas Lumber Company 36 Ton Two Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania, March 1912. This locomotive was used for logging near Kildare, Texas. Photograph by Schauble.