| Year | 1949 |
| Date | 07-Jul |
| Volume | 101 |
| Issue | 2,511 |
| Page | 21 |
| Category | Road Locomotive |
| Part | |
| Title | Traction Engines not so Well Known |
| Author | Ronald H.Clark |
| Notes | Tandem compound and chain engine by John M.Collings Bacton Norfolk, Cooper Steam Digger Co., the early type of Cooper digger, single-cylinder four-shaft engine by Davey, Paxman & Co |