Some time before this the man who had ridden on the free pass, and given the detectives so much trouble, had been accidentally found by Jack Mullins, a brakeman on conductor Danforth's train. He proved to be an advertising solicitor, employed by no other than Mr. Melville E. Stone, who would have given a thousand dollars to know what his agent knew; for the advertising man had seen the conductor bring out the valise containing the all-important fragment of the draft. But he had not realized the value of the news in his possession, and Mr. Pinkerton took good care to keep him from that knowledge. One hint of the truth to the "Daily News" people, and the whole story would have been blazoned forth in its columns, and the murderer would have taken warning. Not until he had seen the man safely on a train out from Chicago did Mr. Pinkerton breathe easily; and it was not until months later that Mr. Stone learned how near he came to getting a splendid "scoop" on the whole city and country. The identification of the pass-holder removed the last possibility that the valise had been taken into the train by any of conductor Danforth's passengers. And yet the valise was there! How came it there? In the course of their examination two of the passengers had testified to having seen Schwartz enter the toilet-room during the run. Brakeman Jack Mullins stated that he had been in the same room twice that night, that the second time he had noticed the valise, but that it was not there when he went in first. Other witnesses in the car were positive that the person who entered the room last before the time when Mullins saw the valise was Schwartz. Thus the chain of proof was tightening, and Mr. Pinkerton sent for Schwartz. After talking with the brakeman in a semi-confidential way for some time, the detective began to question him about Watt, his fellow-trainman. Schwartz said he was a good fellow, and, in general, spoke highly of him. Mr. Pinkerton seemed to hesitate a little, and then said: "Can I trust you, Schwartz?" "Yes, sir." "Well, the fact is, I am a little suspicious of Watt. You see, his story about that hand overhead does not exactly hang together. I don't want to do him any wrong, but he must be looked after. Now, my idea is to have you go about with him as much as you can, see if he meets any strangers or spends much money, and let me know whatever happens. Will you do it?"