| Year | 2023 |
| Date | 01-Dec |
| Volume | 231 |
| Issue | 4,731 |
| Page | 746 |
| Category | Steam |
| Part | 14 |
| Title | Radial Valve Gears Again |
| Author | Duncan Webster |
| Notes | Twining Valve Gear. Sheds light on what is often seen as a complex subject. Wroxham Broad (photo courtesy of Bure Valley Railway), Kirklees Light Railway, Bure Valley Railway, references |