- 1Book I | As Seen by Two Strangers
- 2II — “I Know the Man”
- 3III — The Man
- 4IV — Sweet Little Miss Clarke
- 5V — The Red Cloak
- 6VI — Integrity
- 7VII — The Letters
- 8VIII — Strange Doings for George
- 9IX — The Incident of the Partly Lifted Shade
- 10Book II | As Seen by Detective Sweetwater
- 11XI — Alike in Essentials
- 12XII — Mr. Gryce Finds an Antidote for Old Age
- 13XIII — Time, Circumstance, and a Villain’s Heart
- 14XIV — A Concession
- 15XV — That’s the Question
- 16XVI — Opposed
- 17XVII — In Which a Book Plays a Leading Part
- 18XVIII — What Am I to Do Now
- 19XIX — The Danger Moment
- 20XX — Confusion
- 21XXI — A Change
- 22XXII — O. B. Again
- 23Book III | The Heart of Man
- 24XXIV — Suspense
- 25XXV — The Oval Hut
- 26XXVI — Sweetwater Returns
- 27XXVII — The Image of Dread
- 28XXVIII — I Hope Never to See That Man
- 29XXIX — Do You Know My Brother
- 30XXX — Chaos
- 31XXXI — What Is He Making
- 32XXXII — Tell Me, Tell It All
- 33XXXIII — Alone
- 34XXXIV — The Hut Changes Its Name
- 35XXXV — Silence — And a Knock
- 36XXXVI — The Man Within and the Man Without
- 37XXXVII — His Great Hour
- 38XXXVIII — Night
- 39XXXIX — The Avenger
- 40XL — Desolate
- 41XLI — Five O’Clock in the Morning
- 42XLII — At Six
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