Builders photo showing right side of 36 inch gauge Boone Fork Manufacturing Company Two Truck Heisler Geared Steam Locomotive Number 7 at Erie, Pennsylvania, undated. This locomotive was to be used for logging near Shull's Mills, North Carolina but was returned to Heisler. The trucks were used on Biles-Coleman Lumber Company Number 102, Construction Number 1516. Photograph by Schauble.

Builder photo of Construction Number 1327 showing left side of Booth Kelly Lumber Company 63 Ton Two Truck Heisler Geared Steam Locomotive Number 4 at Erie, Pennsylvania, March 1916. This locomotive was used for logging near Wendling, Oregon. Photograph by Schauble. Photograph by Schauble.

Builder photo of Construction Number 1327 showing right side of Booth Kelly Lumber Company 63 Ton Two Truck Heisler Geared Steam Locomotive Number 4 at Erie, Pennsylvania, March 1916. This locomotive was used for logging near Wendling, Oregon. Photograph by Schauble.

Builder photo of Construction Number 1206 showing right side of 36 inch gauge Brownlee Lumber Company 18 Ton Two Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania, August 1910. This locomotive was used on the Shubuta and Southwestern Railroad for logging near Shubuta, Mississippi. Photograph by Schauble.

Builder photo of Construction Number 1308 showing right side of 36 inch gauge Bruce and Findlay 23 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, March 1915. It is not known where or for what this locomotive was used for. Photograph by Schauble.

Builder photo of Construction Number 1455 showing right side of Brunner Mond, Canada, Limited 36 Ton, Two Truck Heisler Geared Steam Locomotive Number 4 at Erie, Pennsylvania, January 1922. This locomotive was used for mining limestone to make soda ash near Amherstburg, Ontario. Photograph by Schauble.

Builder photo of Construction Number 1462 showing right side of Buffelen Lumber and Manufacturing Company 63 Ton, Two Truck Heisler Geared Steam Locomotive Number 5 at Erie, Pennsylvania, October 1922. This locomotive was used for logging near Eagle Gorge, Washington. Photograph by Schauble.

Builder photo of Construction Number 1109 showing right side of Bunker-Culler Lumber Company 52 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania in January 1907. This locomotive was used for logging at Bunker, Missouri. Photograph by Schauble.

Builder photo of Construction Number 1296 showing right side of Cairo, Truman and Southern Railroad 42 Ton Two Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania, March 1914. This locomotive was used for logging near Truman, Arkansas. Photograph by Schauble.

Builder photo of Construction Number 1326 showing right side of Cairo, Truman and Southern Railroad 24 Ton Two Truck Heisler Geared Steam Locomotive Number 4 at Erie, Pennsylvania, March 1916. This locomotive was used for logging near Truman, Arkansas. Photograph by Schauble.