| CHAPTER | PAGE |
| I | The Epidemic of Mystery | [9] |
| II | Husband, Wife—and Another | [17] |
| III | The Hidden Scandal | [30] |
| IV | The Bronze Face | [41] |
| V | Behind the Door | [52] |
| VI | Cora Hartsilver’s Confession | [61] |
| VII | Concerns “Dear Jessica” | [72] |
| VIII | In Which a Discovery is Made | [81] |
| IX | Befriending a Reporter | [91] |
| X | A Paragraph for the Papers | [104] |
| XI | Hush Money | [112] |
| XII | Yootha’s Presentiment | [122] |
| XIII | Box Number Thirteen | [133] |
| XIV | Concerns a Necklace | [142] |
| XV | Some Crooked Questions | [153] |
| XVI | Gathering Clouds | [163] |
| XVII | “Nobody Must Know” | [173] |
| XVIII | What Dr. Johnson Knew | [182] |
| XIX | Without a Stain | [194] |
| XX | Concerns a Rumor | [205] |
| XXI | The Little Horses | [215] |
| XXII | Another Mystery Man | [226] |
| XXIII | A Friend Indeed | [236] |
| XXIV | The Tightening Grip | [247] |
| XXV | The City of Smiles | [257] |
| XXVI | Sunset Love | [266] |
| XXVII | Against the Wind | [276] |
| XXVIII | Number Fifteen | [286] |
| XXIX | A Message from Yootha | [291] |
| XXX | Blenkiron’s Narrative | [301] |
| XXXI | Conclusion | [307] |