| Year | 2007 |
| Date | 02-Feb |
| Volume | 198 |
| Issue | 4,292 |
| Page | 143 |
| Category | Steam |
| Part | |
| Title | Steam Operated Cylinder Drain Cocks and Relief Valves |
| Author | Ivan Law |
| Notes | Passes on details of a design, gives some insight into how he stores drawings. The backhead valve with dummy hand wheel, follow on, Big Emma (Lickey Banker), relief valves fitted to the author's locomotive, close up, design, details |