| Year | 1905 |
| Date | 13-Jul |
| Volume | 13 |
| Issue | 220 |
| Page | 34 |
| Category | Railway |
| Part | 3 |
| Title | Railway Signals and Signalling |
| Author | Chas. S.Lake |
| Notes | Signal Mechanism. Signal box interiors, locking frame at Liverpool Street Station, G.E.R., main signal cabin at Liverpool Street, Sykes' electric lock & block apparatus |