| Year | 1939 |
| Date | 18-May |
| Volume | 80 |
| Issue | 1,984 |
| Page | 573 |
| Category | Locomotive |
| Part | |
| Title | The Wheels and the Track |
| Author | Henry Greenly |
| Notes | Pony Truck Design. Illustrating Baldry's rule, the Webb radial axlebox as used on L.N.W.R. locomotive, the Greenly-Krauss truck, in action, the simple modified type |