| Year | 1949 |
| Date | 27-Jan |
| Volume | 100 |
| Issue | 2,488 |
| Page | 116 |
| Category | Locomotive |
| Part | |
| Title | "Maid," "Minx" and "Doris" |
| Author | LBSC |
| Notes | Snifting Valves. How to erect, types of valve required, how to make the Maunsell type, section, section of inverted valve, how to connect up, N.W.Burtt's "Petrolea" at Sharon, U.S.A. |