Railroad Archives Online
- CollectionD0171 - John Lewis Collection
- Series009 - Logging Railroads
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3001 - Steam Locomotives
- 4 more...
- ItemJEL-HL-005 - Sierra Railway Company of California Heisler Locomotive Number 9 at Erie, Pennsylvania, 1899
- ItemJEL-HL-006 - Dahoga and Highland Railroad Heisler Locomotive Number 1 "C.H. Heim" at Erie, Pennsylvania, 1900
- ItemJEL-HL-007 - Amsler and Campbell Heisler Locomotive Number 2 at Erie, Pennsylvania, 1900
- ItemJEL-HL-008 - R.W. Potter Company Heisler Locomotive Number 2 at Erie, Pennsylvania, 1902
- ItemJEL-HL-009 - Frees Valley Railway Heisler Locomotive Number 4 at Erie, Pennsylvania, 1903
- ItemJEL-HL-010 - The Tyronza and Saint Francis River Railroad Heisler Locomotive Number 3 at Erie, Pennsylvania, 1906
- ItemJEL-HL-011 - Standard Railway and Timber Company Heisler Locomotive Number 1 at Erie, Pennsylvania, 1906
- ItemJEL-HL-012 - Stillwater Lumber Company Heisler Locomotive Number 101 at Erie, Pennsylvania, 1906
- ItemJEL-HL-013 - Dempsey Lumber Company Heisler Locomotive Number 1 at Erie, Pennsylvania, undated
- 493 more...