Mystery by the American author. Contents: The Owner of New York; The Shadow of Mystery; The Moving Finger Writes; Darkness and Panic; A Scientist in Pink Silk; The Wrath to Come; A World of Ghosts; Percy Darrow's Theory; The Great Silence; The Lifting of the Spell; Thirty Seconds More; The Unknown; Darrow's Challenge; The Fear of Danger; The Master Speaks Again; The Professor's Experiment; Drawing the Net; Confusion Worse Confounded; Percy Keeps Vigil; The Plague of Cold; In the Face of Eternity; The Man Next Door; How It All Was; and What Happened Afterward.