| Year | 1934 |
| Date | 12-Apr |
| Volume | 70 |
| Issue | 1,718 |
| Page | 343 |
| Category | Portable Engine |
| Part | |
| Title | Portable Engine Models |
| Author | Henry Greenly |
| Notes | A "Marshall" portable engine of late Victorian design, portable engine by Marshall's of Gainsboro with one piece throat-plate and large radius flanged backplate, portable engine with "Btritannia" type circular firebox, section and cross section |