CONTENTS
| CHAP. | PAGE | |
| I. | The Mystery of the “Sybarite” | [1] |
| II. | The Secret Service | [15] |
| III. | The Cabaret Dancer | [31] |
| IV. | The Burglar’s Microphone | [44] |
| V. | The White Light Café | [55] |
| VI. | The Poison Gas | [69] |
| VII. | The Divorce Detective | [80] |
| VIII. | The Pulmotor | [97] |
| IX. | The Trailing of Paquita | [109] |
| X. | The Detectaphone Detector | [124] |
| XI. | The Frame-up | [135] |
| XII. | The Eavesdroppers | [149] |
| XIII. | The Serpent’s Tooth | [160] |
| XIV. | The Geophone | [171] |
| XV. | The Night of Terror | [183] |
| XVI. | The Invisible Ink | [196] |
| XVII. | The Cipher Letter | [211] |
| XVIII. | The Radio Detective | [226] |
| XIX. | The Wireless Wiretapper | [242] |
| XX. | The Speed Demon | [256] |
| XXI. | The Submarine Ear | [270] |
| XXII. | The Telautomaton | [285] |
| XXIII. | The Curb Market | [300] |
| XXIV. | The Phantom Circuit | [315] |
| XXV. | The Adventuress | [329] |
THE ADVENTURESS
THE ADVENTURESS