| CHAPTER | PAGE | | I | The House of Mystery | 1 | | II | William Parkins Arrives | 19 | | III | A Message from Winifred | 40 | | IV | A Sudden Departure | 49 | | V | The Hawk Seeks Its Prey | 61 | | VI | Secret Service | 77 | | VII | The New Winifred | 96 | | VIII | Henry Updyke Drops In | 115 | | IX | Forces Beyond the Skies | 133 | | X | The Nurse Takes a Chance | 144 | | XI | Mary Johnson | 166 | | XII | The Third Degree | 188 | | XIII | Winifred Meets Updyke | 216 | | XIV | George Carver's Bride | 242 | | XV | Parkins Runs Amuck | 259 | | XVI | The Hut Across the Bay | 279 | | XVII | The Wolf Hound | 288 | | XVIII | Flight of a Soul | 301 |
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