| Year | 1993 |
| Date | 04-Jun |
| Volume | 170 |
| Issue | 3,946 |
| Page | 671 |
| Category | Countryman's Steam |
| Part | |
| Title | Historical Note. Queries |
| Author | John Haining |
| Notes | Single slide bars on portable or traction engines; Ruston & Hornsby near Nairobi with stayless round firebox |