| Year | 1993 |
| Date | 02-Jul |
| Volume | 171 |
| Issue | 3,948 |
| Page | 32 |
| Category | Countryman's Steam |
| Part | |
| Title | Historical Note. Marshall expansion gear |
| Author | John Haining |
| Notes | Portable engine by Marshall 1872, double cylinder expansion portable by Ransomes Sims & Head, patent automatic expansion governor by Ransomes Sims & Head |