When Mr. Barnes entered the coach, no one was in sight. If there were other passengers, they were abed. A few minutes later, he himself was patting two little bags of feathers, and placing one atop of the other in a vain attempt to make them serve as one pillow. He had told the porter that he was tired, and this was so true that he should have fallen asleep quickly. Instead, his brain seemed specially active, and sleep impossible. Mr. Barnes, Jack Barnes, as he called himself to the porter, was a detective, and counted one of the shrewdest in New York, where he controlled a private agency established by himself. He had just completed what he considered a most satisfactory piece of work. A large robbery had been committed in New York, and suspicion of the strongest nature had pointed in the direction of a young man who had immediately been arrested. For ten days the press of the country had been trying and convicting the suspect, during which time Mr. Barnes had quietly left the Metropolis. Twelve hours before we met him, those who read the papers over their toast had been amazed to learn that the suspect was innocent, and that the real criminal had been apprehended by the keen-witted Jack Barnes. What was better, he had recovered the lost funds, amounting to thirty thousand dollars. He had had a long chase after his man, whom he had shadowed from city to city and watched day and night, actuated to this course by a slight clue in which he had placed his faith. Now, his man fast in a Boston prison, he was on his way to New York for requisition papers. As he had said, he was tired, yet despite his need of complete rest his thoughts persisted in rehearsing all the intricate details of the reasoning which had at last led him to the solution of the mystery. As he lay in his upper berth awake these words reached his ears: "If I knew that man Barnes was after me, I should simply surrender." This promised to be the beginning of an entertaining conversation, and as he could not sleep, Mr. Barnes prepared to listen. Extensive experience as a detective had made him long ago forget the philosophic arguments for and against eavesdropping. The voice which had attracted him was low, but his ears were keen. He located it as coming from the section next ahead of his, number eight. A second voice replied: "I have no doubt that you would. But I wouldn't. You overestimate the ability of the modern detective. I should actually enjoy being hounded by one of them. It would be so much pleasure, and I think so easy, to elude him."