December 1864. As a cold winter wind scours the Worcestershire countryside, an excursion train comes through a tunnel in the Malvern Hills, only to be confronted by a blockage on the line ahead. The driver manages to slow the train down so that the impact is minimised, but the passengers are alarmed. The first person to alight is Cyril Hubbleday, the man in charge of the excursion. He walks to the front of the locomotive - and, as he is talking to...