- Collection2013.6 - David Davies Railway Collection
- Series2013.6.14 - Controlling Movement
- File2013.6.14.1 - Control systems, dispatching, schedules, and bulletins
- File2013.6.14.2 - Transmission of orders: Telegraph, telephone, radio, electronics, time
- File2013.6.14.3 - Train order stations: Hooping-up
- File2013.6.14.4 - Signals: Semaphore and searchlight
- File2013.6.14.5 - Lights, hands, whistles
- 3 more...