| Year | 1949 |
| Date | 01-Sep |
| Volume | 101 |
| Issue | 2,519 |
| Page | 296 |
| Category | Road Locomotive |
| Part | |
| Title | Traction Engines not so Well Known |
| Author | Ronald H.Clark |
| Notes | Edward Humphries general purpose traction engine), Lampit & Co., Mann & Charlesworth (5-ton light traction engine, Mann's single-cylider engine, tractor converted to a roller), Petters, see 103 2564 42 |