| Year | 1941 |
| Date | 27-Feb |
| Volume | 84 |
| Issue | 2,077 |
| Page | 171 |
| Category | Railway |
| Part | 12 |
| Title | Railway Signals. Standard Semaphore Types used in Pre-grouping Days |
| Author | O.S.Nock |
| Notes | Great Northern Railway (Part 2). A typical signal gantry using wooden dolls and 5 ft. arms, constructional details |