Chapter I — A Man with a Message
Chapter II — A Strange Discovery
Chapter III — A Visitor Returns
Chapter IV — Mann Assembles Data
Chapter V — The Shadow Begins
Chapter VI — Two Men Plot
Chapter VII — The Shadow's Choice
Chapter VIII — Orlinov's Castle
Chapter IX–Cliff Sends a Message
Chapter X — The Shadow's Plan
Chapter XI — Orlinov Speaks Facts
Chapter XII — Tremont's Visitor
Chapter XIII — The Shadow's Flight
Chapter XIV — The Shadow's Fight
Chapter XV — After Midnight
Chapter XVI — A Perfect Scheme
Chapter XVII — The Plan Works
Chapter XVIII — Orlinov's Threat
Chapter XIX — The Man From Outside
Chapter XX — The Man From Inside
Chapter XXI–Cliff Finds a Chance
Chapter XXII — The Shadow Speaks
Chapter XXIII — The Attack
