| Year | 1932 |
| Date | 24-Nov |
| Volume | 67 |
| Issue | 1,646 |
| Page | 488 |
| Category | Road Locomotive |
| Part | |
| Title | Modelling Traction Engines. With Notes on the Development of the Prototype |
| Author | Henry Greenly |
| Notes | Thompson's three-wheeled used by Harrogate Gas Co. in 1871, Smith's tilting boiler road loco in 1858, D.K.Clark's 1862 design built by Bray, Hornsby's undertype with trunk piston rods, later Clark built on rail locomotive principle |