"Oh, yes. I've often explored this place," replied Mr. Dalton, readily. "It's a passage leading under the swamp to the mainland." "Show us the way, and we will follow it." "Come along, then, and in a few minutes we'll be out of here." They entered the tunnel, and Old King Brady said to the broker: "When I entered the Thirty-sixth street house the night you were abducted, I found a curious dagger lying on the floor, and blood-stains on the boards. These clews led me to suppose a murder had been committed there. Do you know anything about those things?" "Yes," replied the broker. "The dagger was one I had purchased as a curiosity that evening from a shop in Fourth avenue. When those two men attacked me, I drew it, and cut the negro before they got the best of me by knocking it from my hand. Sim bound up his wound, and then they knocked me down and drugged me." Old King Brady laughed. "Another mystery solved," he muttered. "You thought I was the victim, eh?" "I did. But I see my error now." "Daylight ahead," interposed Young King Brady just then. "That's the exit from this tunnel," explained Mr. Dalton. They left the passage among some rocks in the grounds above the house, and saw Lizzie Dalton near by. She sat on a log gazing away toward the big swamp with a sad expression upon her pretty face. Mr. Dalton became excited. "Lizzie!" he shouted hoarsely. She sprang to her feet as if electrified, glanced around at him with a joyful look beaming all over her face, and cried emotionally: "Oh, papa!" The next moment they rushed into each other's arms, and kissed and wept over each other, their hearts too full for utterance. The Bradys turned away from the affecting scene. "Guess everything's all right, Harry," muttered the old detective. "Looks that way," replied the boy. "We've got very little more to do now." "Only to get the nippers on Mason and his black pal." "Where in thunder could they have gone?" "Let's notify the authorities along the line of the railroad in both directions to keep a lookout for the pair." Acting upon this suggestion, they quietly stole away, leaving the reunited and happy father and daughter talking over past events. Proceeding to Swamp Angel, and learning that neither of the villains had yet put in an appearance there, they got the telegraph instrument operating, and flashed a warning message all along the line. News reached them that neither Mason nor Johnson had made any attempt to get away on the cars yet. In discussing this on their way back to Dalton's the old detective came to a wise conclusion, when he said: "After all, they ain't apt to show themselves for a while yet, Harry. Both know the game is up, and that we'll be on the lookout for them to escape. They'll expect us to make a bee line for the railroad depots the first thing. Therefore, they'll shun the stations." "You think they'll remain concealed around the swamp a while?"