Bull raised a hand and his eyes to the ceiling. Before his visitor had entered the room, Quick believed that Monte Murphy had not seen any one but Blair before dying. Well it was for the latter that he told of the old “fence” being found alive by the detective. When Bull was announced, Mike thought that if he put his victim out of the way it would never be known who killed Murphy. He had about made up his mind to kill Blair. Now he could gain nothing by doing so, as he quite readily recognized. “Bull,” said Quick, “I am going to leave the city. Suppose you come with me.” “Where do you intend to go?” “I have not figured on any place in particular.” “How is Boston?” “No good; Chicago is better.” “Have you any money?” “A few thousand.” “I’m your man. When will you start?” asked Bull. “I’ll meet you at the Pennsylvania Depot, in Jersey City, at eight to-night.” “It is a bargain. Now I will be going.” After the departure of his visitor, Quick paced the room nervously. His conscience did not trouble him. His mind was perturbed simply because his crime had been discovered. And what had he gained by killing the old “fence”? Nothing. The man who had just left gained that of which Quick had gone in search. Could Mike have known that Blair had the green diamond, he would not have allowed him to depart so readily. Bull had not the remotest idea of keeping his appointment with the dive-keeper. But he did intend to leave New York on his own hook. Blair believed that, to save himself, Tony Riley would tell the police all he knew about the robbery. Bull made up his mind not to visit any of his usual haunts. Quick was startled by hearing what seemed to be a row down-stairs. “Jimmy don’t seem to be able to keep them roosters from fighting,” he remarked. “It would be different if I was behind the bar.” Suddenly everything became quiet and Mike dropped into an armchair. At that very moment the door of the room was thrown open. Burt Cromwell stood upon the threshold. CHAPTER XXIX. PIERRE JACQUET’S REVENGE. At sight of the detective Quick sprang to his feet. Not until then did he see that Burt Cromwell had a cocked revolver in his hand. “Sit down!” Mike obeyed mechanically. When Enoch Cook told the detective he had located Bull Blair at the dive, Frank Hare wanted to go there. Burt Cromwell insisted upon taking the matter in his own hands. Of course he prevailed. Burt Cromwell had not expected to find Quick at the dive. The row heard by the latter occurred between Elford and the detective. Burt Cromwell had left the fellow insensible on the barroom floor. Then he locked up the place, before beginning a search of the premises for Bull Blair. “I did not expect to find you here, my man,” said Burt Cromwell, after a pause. Quick looked vacantly at the detective for a full minute. Then he spoke. “By what right do you force your way into my apartments?” he said. “You know why I am here!”