Contents
I. A Death in the Night
II. On the Trail
III. A Hot Scent
IV. Doubts
V. What Miss Philpot Thought
VI. Fresh Forces
VII. What the Photograph Told
VIII. Facts and Theories
IX. The Empty House
X. A Night of Terror
XI. Rescue
XII. Theory Number Four
XIII. Mr. Elthorne at Home
XIV. A Second Problem
XV. Mr. Elthorne at Work
XVI. Allingham Gets Busy
XVII. The Night Hunters
XVIII. Mr. Sparker's Adventure
XIX. Unraveling the Threads
XX. The Villain of the Piece
XXI. The Loose Ends
