- 1Dedication — Chapter I — The Secret Signal
- 2Chapter II — The Voice From the Void
- 3Chapter III — The Calico Glove
- 4Chapter IV — The Devil’s Oven
- 5Chapter V — The Mystery Widow
- 6Chapter VI — The Cloven Hoof
- 7Chapter VII — The Poison Factory
- 8Chapter VIII — The Great Intrigue
- 9Chapter IX — The Three Bad Men
- 10Chapter X — The Mystery of Berenice
- 11Chapter XI — The Marked Man
- 12Chapter XII — The Crow’s Cliff
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