| Year | 2013 |
| Date | 13-Dec |
| Volume | 211 |
| Issue | 4,471 |
| Page | 878 |
| Category | Locomotive |
| Part | 8 |
| Title | Building Locomotives from Kits |
| Author | Doug Hewson |
| Notes | Perfects the valve gear. A prototype Britannia (photo by Nigel Fraser-Ker), setting Walscheart's (Walschaert's?) valve gear, Mike Hewson |