| I. | Mystery at Luce Manor |
| II. | A Sinister Suggestion |
| III. | Hoaxed? |
| IV. | Inspector Tanner Grows Suspicious |
| V. | Inspector Tanner Becomes Convinced |
| VI. | What Cosgrove Had to Tell |
| VII. | Cosgrove’s Trip North |
| VIII. | Tanner Finds Himself Duped |
| IX. | Lois Drew Takes a Hand |
| X. | A Woman’s Wit |
| XI. | A Fresh Start |
| XII. | A Stern Chase |
| XIII. | Blackmail? |
| XIV. | A Dramatic Discovery |
| XV. | In the Luce Manor Boathouse |
| XVI. | Conclusion |