"You cannot identify any of these with Miss Rider?" asked Tarling in a tone of disappointment.
The detective shook his head. Despite his apparent unsuccess, he had evidently made some discovery which pleased him, for there was nothing gloomy in his admission of failure.
"You have found out something, though?" suggested Tarling quickly, and Whiteside nodded.
"Yes," he said, "by the greatest of luck I've got hold of a very curious story. I was chatting with some of the ticket collectors and trying to discover a man who might have seen the girl—I have a photograph of her taken in a group of Stores employees, and this I have had enlarged, as it may be very useful."
Tarling nodded.
"Whilst I was talking with the man on the gate," Whiteside proceeded, "a travelling ticket inspector came up and he brought rather an extraordinary story from Ashford. On the night of the murder there was an accident to the Continental Express."
"I remember seeing something about it," said Tarling, "but my mind has been occupied by this other matter. What happened?"
"A luggage truck which was standing on the platform fell between two of the carriages and derailed one of them," explained Whiteside. "The only passenger who was hurt was a Miss Stevens. Apparently it was a case of simple concussion, and when the train was brought to a standstill she was removed to the Cottage Hospital, where she is to-day. Apparently the daughter of the travelling ticket inspector is a nurse at the hospital, and she told her father that this Miss Stevens, before she recovered consciousness, made several references to a 'Mr. Lyne' and a 'Mr. Milburgh'!"
Tarling was sitting erect now, watching the other through narrowed lids.
"Go on," he said quietly.