| Year | 1931 |
| Date | 22-Oct |
| Volume | 65 |
| Issue | 1,589 |
| Page | 409 |
| Category | Practical Letters from Our Readers |
| Part | |
| Title | Old Plough Engine at Bedford |
| Author | C.E.Shackle |
| Notes | Howard's "Farmers' Engine" and steam ploughing windlass combined with portable engine, Boydell's engine about 1865, detail of Boydell's wheel |