‘Q’ class 0-4-4 tank-engine number 136 is about to leave Westerham pulling a ‘birdcage’ set of coaches. This peculiar term was used to describe coaches with the little top-light window that the guard would use with a periscope viewer to look at the state of signals ahead – not so easy for the engine crew ...
Reference: WH0131
The ‘tablet’ was part of an electrical blocking system used to ensure there was only one moving locomotive on the branch-line at any moment in time. The large loop handle of the tablet made catching easier if this had to happen while the train was moving.
Reference: WH0119