| Year | 1953 |
| Date | 09-Apr |
| Volume | 108 |
| Issue | 2,707 |
| Page | 450 |
| Category | Locomotive |
| Part | |
| Title | Twin Sisters |
| Author | J.I.Austen-Walton |
| Notes | Throat plate, firebox tube plate, firebox door plate, dome cap ring, firehole door ring, steam pipe dome manifold, superheaters, "dreams of the future", a simple version of the triple valve, drawings |