| Year | 1967 |
| Date | 19-May |
| Volume | 133 |
| Issue | 3,321 |
| Page | 488 |
| Category | Locomotive |
| Part | |
| Title | Shunting Engines |
| Author | K.N.Harris |
| Notes | Characteristics. 5"g. "Midge" Simpson-Gentry design, 5"g. 0-6-0 Austen-Walton's "Twin Sisters", model designs, 3 1/2"g "Rob Roy" Martin Evans, 1 1/2" scale U.S.A. "Switcher", starting characteristics, valve travel |