Up to this time Glen had no idea of what had happened, nor of the cause of the shooting that had resulted so disastrously. Now, though he did not turn his head, he learned, from the conversation between the conductor and his fireman, whom the former called "General," that an attempt had been made to rob the train of a large sum of money that the latter had placed in a safe in the express-car. He had received secret information that such an attempt would probably be made, and had engaged two detectives in St. Louis to guard his treasure. When the train was stopped in the woods by a danger signal waved across the track, the engine-driver had been ordered by the would-be robbers, who had cut the express-car loose from those behind it, to go ahead. His refusal to obey them had cost him his life, and the fireman an ugly wound.