CHAPTER I. THE SPRUCE STREET MURDER. CHAPTER II. OLD SPICER VISITS THE SCENE OF THE MURDER. CHAPTER III. OLD SPICER BEGINS AN INVESTIGATION. CHAPTER IV. OLD SPICER CONTINUES HIS INVESTIGATIONS.—THE SECRET VAULT. CHAPTER V. SETH STRICKET MAKES HIS REPORT. CHAPTER VI. HORRIFIED WATCHERS—IN THE TUNNELS AND VAULT. CHAPTER VII. TWO IMPORTANT AND INTERESTING CHARACTERS. CHAPTER VIII. BARNEY HAWKS REVEALS A TERRIBLE SECRET—TRAPPED. CHAPTER IX. THE SITUATION CHANGED—OLD SPICER STARTS FOR NEW YORK. CHAPTER X. ON THE EVE OF A TERRIBLE CRIME. CHAPTER XI. A DOUBLE MURDER—AN UNCEREMONIOUS VISIT. CHAPTER XII. BARNEY AND JAKE START FOR NEW YORK. CHAPTER XIII. OLD SPICER AND KILLETT IN TAYLOR'S SALOON. CHAPTER XIV. JIM TAYLOR MAKES HIS APPEARANCE. CHAPTER XV. THE TRUE STORY OF THE MURDER. CHAPTER XVI. OLD SPICER INTERVIEWS CORA BELL. CHAPTER XVII. JIM TAYLOR IS ARRESTED. CHAPTER XVIII. OLD SPICER'S SPEAKING-TUBE. CHAPTER XIX. DETECTIVES IN A TIGHT SPOT. CHAPTER XX. JAKE KLINKHAMMER'S POCKETBOOK—OLD SPICER SURPRISED. CHAPTER XXI. CHAMBERLAIN'S MYSTERIOUS FRIEND—A STRANGE DISAPPEARANCE. CHAPTER XXII. CHAMBERLAIN'S CAPTURE. CHAPTER XXIII. ON BOARD THE BOUNCING BETSEY. CHAPTER XXIV. IN NO MAN'S BAY—MAG'S HOVEL. CHAPTER XXV. A SURPRISE PARTY. CHAPTER XXVI. CONCLUSION.