| Year | 1967 |
| Date | 06-Jan |
| Volume | 133 |
| Issue | 3,312 |
| Page | 8 |
| Category | Internal Combustion |
| Part | 5 |
| Title | Four-Stroke Petrol-Engines |
| Author | Edgar T.Westbury |
| Notes | A review of progress in pre- and post-war years. 30 c.c. flat twin engine, "1831" engine, 10 c.c. Seagull, low compression |