| Year | 1951 |
| Date | 25-Oct |
| Volume | 105 |
| Issue | 2,631 |
| Page | 554 |
| Category | Locomotive |
| Part | |
| Title | Twin Sisters. Two 5-in. gauge locomotives, exactly alike externally but very different internally |
| Author | J.I.Austen-Walton |
| Notes | Enter "caution", steam and exhaust bends, smokebox disease, union nuts, re-enter the pipes, simple pipe bending jig |