| Year | 1973 |
| Date | 01-Jun |
| Volume | 139 |
| Issue | 3,466 |
| Page | 539 |
| Category | Talking About Steam |
| Part | |
| Title | Canada revisited |
| Author | W.J.Hughes |
| Notes | Jack Kerr's "Northern Pacific" 4-8-4, Geoff Symon's Case traction engine and dividing head, Westbury "Theseus" engine |