| Year | 1953 |
| Date | 16-Jul |
| Volume | 109 |
| Issue | 2,721 |
| Page | 66 |
| Category | More Utility Steam Engines |
| Part | |
| Title | The "Unicorn" mill engine |
| Author | Edgar T.Westbury |
| Notes | Cylinder, cutter for milling all three ports simultaneously, steam chest and cover, cutting cylinder ports, cylinder covers, glands |