other at that time. Eph went away an instant before Ravelli came." "Did you talk with Ravelli?" "Yes." "About what?" "Not about Eph at all." "About what, then?" Now the reply came reluctantly: "A personal matter—something that had occurred between us—an incident at the telegraph station." "The station where Eph had awakened the girl operator? Was it a quarrel about her?" "That is no concern of yours. You are impertinent." "Well, sir, the question is pertinent—as the lawyers say—and the answer concerns you, whether it does me or not. You and Ravelli quarreled about the girl?" "The young lady shall not be dragged into this. She wasn't responsible for what happened between Ravelli and me." "What did happen between you and Ravelli?" The two men stood close to and facing each other. The eyes of the detective glared gloatingly at an upward angle into the pale but still firm face of the taller Gerald, and then dropped slowly, until they became fixed on a red stain on the sleeve of the other's coat. Did he possess the animal scent of a bloodhound? "What is that?" he sharply asked. He seized the arm and smelled of the spotted fabric. "It is blood! Let me see your knife." Quite mechanically Gerald thrust one hand into his trousers pocket and brought out the knife which he had taken back from Ravelli, whose blood was on it yet. The storm was overhead. A first peal of thunder broke loudly. It came at the instant of the assemblage's tensest interest—at the instant when Gerald Heath was aghast with the revelation of his awful jeopardy—at the instant of his exposure as a murderer. It impressed them and him with a shock of something supernatural. The reverberation rumbled into silence, which was broken by O'Reagan: