INTRODUCTORY. CHAPTER I. A MURDER. CHAPTER II. MAT MORRIS. CHAPTER III. SHADOW—WHO WAS HE? CHAPTER IV. OUT OF THE LION'S JAWS. CHAPTER V. HELEN DILT. CHAPTER VI. THE REMEMBERED BILLS. CHAPTER VII. A HAPPY MOMENT. CHAPTER VIII. A NARROW ESCAPE. CHAPTER IX. IN THE BLACK HOLE. CHAPTER X. FAVORING FORTUNE. CHAPTER XI. IN THE MAD-HOUSE. CHAPTER XII. SHADOW. CHAPTER XIII. IN A BAD BOX. CHAPTER XIV. DICK STANTON. CHAPTER XV. A FIEND IN HUMAN SHAPE. CHAPTER XVI. DISAPPOINTED AGAIN. CHAPTER XVII. HELEN'S TORTURE. CHAPTER XVIII. PUZZLED. CHAPTER XIX. IN DEADLY PERIL. CHAPTER XX. STILL SEARCHING. CHAPTER XXI. FUN! CHAPTER XXII. OUT OF JEOPARDY. CHAPTER XXIII. WEAVING THE NET. CHAPTER XXIV. "HELP IS HERE!" CHAPTER XXV. MAN OR WOMAN? CHAPTER XXVI. CORNERED CRIMINALS. CHAPTER XXVII. THE MYSTERY EXPLAINED.