I. Mr. Morgan Meets Tragedy
II. Inspector French Gets Busy
III. Experimental Detection
IV. A Change of Venue
V. Messrs. Berlyn and Pyke
VI. The Despatch Of The Crate
VII. Dartmoor
VIII. A Fresh Start
IX. A Step Forward
X. London’s Further Contribution
XI. John Gurney, Night Watchman
XII. The Duplicator
XIII. The Accomplice?
XIV. French Turns Fisherman
XV. Blackmail
XVI. Certainty At Last
XVII. “Danger!”
XVIII. On Hampstead Heath
XIX. The Bitterness of Death
XX. Conclusion