| Year | 1987 |
| Date | 18-Dec |
| Volume | 159 |
| Issue | 3,815 |
| Page | 772 |
| Category | Rally |
| Part | |
| Title | Discoveries at Knowl Hill |
| Author | Ted Jolliffe |
| Notes | 1910 Heinrici hot air engine owned by M.R.Baker, freelance horizontal steam engine by A.A.Price, E.F.Bolton's 1905 Rider-Ericsson hot air engine, A.M.Miller-Mead's V8 oscillating engine, 1925 De Witte dragsaw owned by M. & G.Lowe, Robinson hot air engine owned by Edgar Bolton, 15cc gas engine patterns by Norman Phelps, 1905 Heinrici engine |