represents the exact location of the muzzle of the gun that ended Benson's career. You see the reasoning—eh, what? Having two points in the bullet's course—namely, the hole in the chair and the mark on the wainscot—, and also knowing the approximate vertical line of explosion, which was between five and six feet from the gentleman's skull, it was merely necess'ry to extend the straight line of the bullet's course to the vertical line of explosion in order to ascertain the exact point at which the shot was fired."
"Theoretically very pretty," commented Markham; "though why you should go to so much trouble to ascertain this point in space I can't imagine. . . . Not that it matters, for you have overlooked the possibility of the bullet's deflection."
"Forgive me for contradicting you," smiled Vance; "but yesterday morning I questioned Captain Hagedorn at some length, and learned that there had been no deflection of the bullet. Hagedorn had inspected the wound before we arrived; and he was really pos'tive on that point. In the first place, the bullet struck the frontal bone at such an angle as to make deflection practically impossible even had the pistol been of smaller calibre. And in the second place, the pistol with which Benson was shot was of so large a bore—a point-forty-five—and the muzzle velocity was so great, that the bullet would have taken a straight course even had it been held at a greater distance from the gentleman's brow."
"And how," asked Markham, "did Hagedorn know what the muzzle velocity was?"
"I was inquis'tive on that point myself," answered Vance; "and he explained that the size and character
