| Year | 1951 |
| Date | 27-Dec |
| Volume | 105 |
| Issue | 2,640 |
| Page | 853 |
| Category | Locomotive |
| Part | |
| Title | Twin Sisters. Two 5-in. gauge locomotives, exactly alike externally but very different internally |
| Author | J.I.Austen-Walton |
| Notes | Valve guide bracket, base and bearing block, nose, grindstone, an unfortunate setback |