I. The Girl Across the Hall
II. The Tragedy
III. Janet Pembroke
IV. Doctor Post's Discovery
V. Several Clues
VI. The Inquest Begins
VII. I Give Evidence
VIII. An Awful Implication
IX. George Lawrence
X. Person or Persons Unknown
XI. The Chained Door
XII. Janet Is Our Guest
XIII. Janet Is Mysterious
XIV. Mrs. Altonstall
XV. Who Is J. & S.?
XVI. Leroy Arrives on the Scene
XVII. Can Leroy Be Guilty?
XVIII. The Rooms in Washington Square
XIX. A Talk With Janet
XX. The Initialed Handkerchief
XXI. Fleming Stone
XXII. A Call on Miss Waring
XXIII. Lawrence's Statement
XXIV. The Chain of Evidence
