Builder photo of Construction Number 1173 showing right side of 36 inch gauge Pardee and Curtin Lumber Company 36 Ton Two Truck Heisler Geared Steam Locomotive Number 8 at Erie, Pennsylvania, October 1909. This locomotive was used in logging in West Virginia. Photograph by Schauble.

Builder photo of Construction Number 1123 showing left side of Pacific National Lumber Company 28 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania in November 1907. This locomotive was used for logging at National, Washington. Also it should be noted this has been noted as a 28 ton locomotive as well as a 37 ton. Photograph by Schauble.

Builder photo of Construction Number 1172 showing right side of Pacific and Eastern Railway 42 Ton Two Truck Heisler Geared Steam Locomotive Number 101 at Erie, Pennsylvania in November 1909. This locomotive was used in logging near Raymond, Washington. Photograph by Schauble.

Overhead 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.

Builder photo of Construction Number 1368 showing right side of Oval Wood Dish Company 63 Ton, Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania, January 1918. This locomotive was used for logging near Kildare, New York. This company in May 1920 became the Oval Wood Dish Corporation. Photograph by Schauble.

Builder photo of Construction Number 1352 showing right side of Oval Wood Dish Company 63 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania, January 1917. This locomotive was used for logging near Kildare, New York. This company in May 1920 became the Oval Wood Dish Corporation. Photograph by Schauble.

Builder photo of Construction Number 1201 showing right side of Oregon-Washington Timber and Railway Company 60 Ton Two Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania in May 1910. This locomotive was used for logging near Cruzette, Washington. Photograph by Schauble.

Builder photo of Construction Number 1159 showing right side of Oregon-Washington Logging Company 60 Ton Two Truck Heisler Geared Steam Locomotive Number 2 at Erie, Pennsylvania in April 1909. This was used for logging near Cruzette, Washington. Photograph by Schauble.

Builder photo of Construction Number 1148 showing right side of Oregon-Washington Logging Company 39 Ton Two Truck Heisler Geared Steam Locomotive Number 1 at Erie, Pennsylvania in November 1908. This locomotive was used for logging at Glacier, Washington. Photograph by Schauble.

Builder photo of Construction Number 1153 showing left side of Oregon Timber and Lumber Company 42 Ton Two Truck Heisler Geared Steam Locomotive Number 3 at Erie, Pennsylvania in January 1909. This was used for logging out of Clifton, Oregon. Photograph by Schauble.