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.

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.

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.

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.

Mill Valley and Mount Tamalpais Scenic Railway 37 Ton Two Truck Heisler Geared Steam Locomotive Number 3 "S.B. Cushing" was built in July 1897 and is seen here at Mill Valley, California.

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.