| Year | 1979 |
| Date | 06-Jul |
| Volume | 145 |
| Issue | 3,612 |
| Page | 770 |
| Category | Locomotive |
| Part | 9 |
| Title | 'Columbia'. A Baldwin U.S.A. based design for 3 1/2 in. gauge |
| Author | Martin Evans |
| Notes | Some valve gear components. General arrangement of valve gear, boiler by Bert Perryman, important (threads in cast iron pistons) |