It was in fact a game of spy on both sides during most of the journey, with little but mystifying results. The train reached Twin Lakes at about sundown, and even then the girls had discovered no positive evidence as to the “squint-eyed man’s” purpose in taking the trip they were taking. And Langford, as he left the train, could not confidently say to himself that he had detected any suggestion of interest on their part because of his presence on the train.