| Year | 2024 |
| Date | 16-Dec |
| Volume | 232 |
| Issue | 4,732 |
| Page | 22 |
| Category | Steam |
| Part | 15 |
| Title | Radial Valve Gears Again |
| Author | Duncan Webster |
| Notes | Ouest Valve Gear. Sheds light on what is often seen as a complex subject. Inside and outside admission, valve gear performance, locomotive with Hawthorne Kitson valve gear, references |