| Year | 1953 |
| Date | 30-Apr |
| Volume | 108 |
| Issue | 2,710 |
| Page | 542 |
| Category | Locomotive |
| Part | |
| Title | Twin Sisters |
| Author | J.I.Austen-Walton |
| Notes | Pads for backhead fittings, a further step, superheater, more boiler parts, hollow stays, the ashpan, how it works, the grate, firehole door, the swinging type |