The detective could see his face. He saw the man’s brow wrinkle first when he perceived that somebody was standing alone by the rail. Then his lips were pressed hard together, and he nodded as if satisfied. Evidently he had recognized Snell. For a moment longer he stood there, hesitating, perhaps. Then he gave a side glance at Patsy, who sat so close that they almost touched each other. The detective seemed to be deeply engaged in reading a placard hung on the opposite wall. The man softly opened the door and went out. Patsy was on his feet instantly. Looking through the glass, he saw the stranger slink into the darkness by the side wall of the boat, there being a space thus shut in between the cabin door and the open deck where Snell stood looking at the water. “What a chance,” thought Patsy, “to sneak up and pitch his man overboard!” The stranger stood motionless a moment. Then he edged forward. At that Patsy quietly opened the door and stepped out. The man did not hear him. His attention was too much taken with what he was going to do. Snell was motionless. The boat was about in midstream. Patsy’s muscles quivered as the stranger glided swiftly up and placed his hand on Snell’s shoulder. Snell whirled around, with a gasp of surprise and alarm. He put up his hands to push the man away, and tried to back from the rail. The stranger kept his hand firmly on Snell’s shoulder. For a second or two the men jostled each other, but it could not be said that they were struggling. The stranger seemed merely trying to hold Snell still. Patsy heard him say: “Keep quiet! I am not going to hurt you!” Evidently Snell was somewhat relieved at this, but he was still frightened. “I’ve a good mind to have you arrested,” he said. The other laughed. “You’ll think better of that as soon as you see a policeman,” he retorted. “You’ve tried to kill me once to-night,” said Snell. “Well, let that pass. I didn’t succeed, and now that you’re starting West I shan’t try again.” “What do you want of me now?” “I want to talk with you.” “On the same subject?” “The same.” Snell gave a hasty glance at the river. “Think of jumping in?” sneered the stranger. “No,” replied Snell, with a shudder. Then he looked back toward the cabin, and saw Patsy. Seeing that he was perceived, the detective walked easily forward and stood looking at the lights of Jersey City. “This is no place,” said Snell, in a low tone. “Of course not. I’ll go on the train with you.” Snell started uncomfortably. “I presume,” the other went on, with a harsh chuckle, “that you engaged a stateroom on the sleeper, and thought that you would lock yourself in and so be safe for the night. Fortunately, there’s room for two in a stateroom.” At this, Snell said nothing, but went back to the cabin. The other followed, and both went inside. “Well!” thought Patsy, “this is a puzzler, and no mistake. Are they both crooks? and have they had a falling out?