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 1320 showing right side of Bond-Foley Lumber Company 52 Ton Two Truck Heisler Geared Steam Locomotive Number 4 "Sam" at Erie, Pennsylvania, January 1916. This locomotive was used on the Rockcastle River Railroad for use in logging near Bond, Kentucky. Photograph by Schauble.

Builder photo of Construction Number 1341 showing right side of Blytheville, Burdette and Mississippi River Railway 40 Ton Two Truck Heisler Geared Steam Locomotive Number 7 at Erie, Pennsylvania in June 1916. This company was controlled by the Three States Lumber Company and the locomotive was used for logging at Blytheville, Arkansas. This is one of the locomotives that had a water tank over the boiler. Photograph by Schauble.

Builder photo of Construction Number 1149 showing right side of Blytheville, Burdette and Mississippi River Railway 22 Ton Two Truck Heisler Geared Steam Locomotive Number 6 at Erie, Pennsylvania in February 1909. This company was controlled by the Three States Lumber Company and the locomotive was used for logging at Blytheville, Arkansas. This is one of the early locomotives that had a water tank over the boiler. The weight of the locomotive has been listed as 22 ton and 23 ton. Photograph by Schauble.

Builder photo of Construction Number 1351 showing right side of Bluestone Mining and Smelting Company47 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, January 1917. This locomotive was used for mining near Mason, Nevada. Photograph by Schauble.

Builder photo of Construction Number 1507 showing right side of Bissell Lumber Company 28 Ton, Two Truck Heisler Geared Steam Locomotive Number 6 at Erie, Pennsylvania, September 1924. This locomotive was used for logging near Marshfield, Wisconsin. Photograph by Schauble.

Builder photo of Construction Number 1516 showing right side of 36 inch gauge Biles-Coleman Lumber Company 36 Ton, Two Truck Heisler Geared Steam Locomotive Number 102 at Erie, Pennsylvania, February 1925. This locomotive was used for logging near Omak, Washington. Note the outside frame trucks. Photograph by Schauble.

Builder photo of Construction Number 1157 showing right side of B.H. Hardaway, Contractor 42 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania in July 1909. This was used for construction work at Fox, Alabama. This is one of the early locomotives with a water tank over the boiler. Photograph by Schauble.

Builder photo of Construction Number 1157 showing left side of B.H. Hardaway, Contractor 42 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania in July 1909. This was used for construction work at Fox, Alabama. This is one of the early locomotives with a water tank over the boiler. Photograph by Schauble.

Builder photo of Construction Number 1331 showing right side of 38 inch gauge Bessemer Limestone Company 26 Ton Two Truck Heisler Geared Steam Locomotive Number 22 at Erie, Pennsylvania, February 1916. This locomotive was used for mining limestone near Youngstown, Ohio. Photograph by Schauble.