| Year | 2023 |
| Date | 22-Sep |
| Volume | 231 |
| Issue | 4,726 |
| Page | 429 |
| Category | Steam |
| Part | 9 |
| Title | Radial Valve Gears Again |
| Author | Duncan Webster |
| Notes | Sisson's Valve Gear. Sheds light on what is often seen as a complex subject. Design methodology, geometry, worked example, results, modification, references |