Contents [Chapter I. The Shot] [Chapter II. Isidore Beautrelet, Sixth-form Schoolboy] [Chapter III. The Corpse] [Chapter IV. Face to Face] [Chapter V. On the Track] [Chapter VI. An Historic Secret] [Chapter VII. The Treatise of the Needle] [Chapter VIII. From Cæsar to Lupin] [Chapter IX. Open, Sesame!] [Chapter X. The Treasures of the Kings of France]