| Year | 2023 |
| Date | 14-Jul |
| Volume | 231 |
| Issue | 4,721 |
| Page | 145 |
| Category | Steam |
| Part | 4 |
| Title | Radial Valve Gears Again |
| Author | Duncan Webster |
| Notes | Stephenson's (3). Sheds light on what is often seen as a complex subject. Connecting rod angularity, finding the point of suspension, method 1, method 2, launch links, how I would do the design, which variety, note 1 |