probably“I do, Monsieur Fourbert.” “Nevertheless you, with your trained instincts, and your intimate knowledge of the ways of human beasts of prey, have failed to detect a single sign?” “Again I repeat with sorrow, monsieur, that is quite correct.” “Then it seems highly probable the murderer will go unpunished since you have failed to track him down?” you“I am afraid that will be the case,” answered Roget, with a sigh. “So be it. It is regrettable, but one cannot do that which is impossible. You may go.” Roget bowed and retired. The instant the door had closed Monsieur Fourbert struck his bell. An attendant entered. “Just call Roget back; I have forgotten something.” In another minute the Bull-dog stood in the chief’s presence again. “By the way, I have forgotten to say, Roget, tha

