The inspector’s strategy was indeed that of forlorn hope. Rack his brains as he would, interrogate as he might everyone who could possibly throw light upon the murder of Richard Pargent, he found himself up against a stone wall. Nobody could swear to having seen and recognized the victim from the time he entered the train at West Laverhurst until he had been seen to stagger and fall on the refuge in Praed Street. The ticket collector at Reading was almost positive about him, but, as he explained, he saw so many passengers in the course of his day’s work that he could not be sure of any particular one, unless there was something very remarkable about him or her. All he knew for sure was that if this was the gentleman, he was alone in the carriage when the train left Reading.