| Year | 2005 |
| Date | 18-Mar |
| Volume | 194 |
| Issue | 4,243 |
| Page | 329 |
| Category | General |
| Part | 74 |
| Title | Letters to a Grandson |
| Author | M.J.H. Ellis |
| Notes | Imparts some wisdom through humour followed by a review of the Atkinson Differential engine. Atkinson's Patent Differential Compression Gas engine |