| Year | 1952 |
| Date | 14-Aug |
| Volume | 107 |
| Issue | 2,673 |
| Page | 227 |
| Category | Locomotive |
| Part | |
| Title | Twin Sisters. Two 5-in. gauge locomotives, exactly alike externally but very different internally |
| Author | J.I.Austen-Walton |
| Notes | Boiler parts for Bill Cooper's "Twin Cousin", cylinder drain cocks, small oil pipes, who mentioned plastics? Another omission |