| Year | 1933 |
| Date | 07-Sep |
| Volume | 69 |
| Issue | 1,687 |
| Page | 226 |
| Category | Petrol Engine Topics |
| Part | |
| Title | Concerning Twin Two-strokes |
| Author | Edgar T.Westbury |
| Notes | Some practical examples, the Skingley Bros.' 25 c.c. engine as installed in the "Vixen", components, 67 c.c. twin engine, the Wall "Duplex Mariner" 30 c.c. engine, transfer port side of 67 c.c. engine, combined contact beaker and distributor |