| Year | 1907 |
| Date | 21-Nov |
| Volume | 17 |
| Issue | 343 |
| Page | 510 |
| Category | Queries and Replies |
| Part | |
| Title | 17907. Midland Single Express Engines |
| Author | C.W.H. |
| Notes | Johnson's single wheel express locomotive (Midland Railway) "Princess of Wales" No. 2601 (Old Series) |