The bullet grazed the upraised arm. The ax fell toward O'Hara from fingers lacking strength to retain it, and he grasped it by the handle in midair. The next moment the assassin collected his wits and sprang at him. Silently, the breath of both coming in gasps, the two men strove, each clawing desperately at the other's throat. The reporter fought with the knowledge that should he lose he would never again see the light of day, the other with the fear of the justice that would deal with him. The maniac hugged his arms tightly about Jimmie, pinioning him so tightly that the reporter could not use his gun. At length their convulsive movements brought the men close to the lantern, and the next instant the cellar was plunged in darkness. A second later the Professor tripped over some hidden obstruction and fell, dragging his opponent with him to the earthen floor. To Jimmie's surprise there was no further movement from the body beneath him. Could the old villain be playing possum? He cautiously shifted his hold and grasped the hidden throat. He pressed the Professor's windpipe for a moment, but there was no answering struggle. Slowly the truth dawned upon him. The heavy fall to the floor had rendered the older man insensible. He must work fast. Reaching into his pocket he brought out the ever handy electric torch and flashed it over the features of his prisoner. Kell was breathing heavily. With dexterous hands O'Hara swiftly went through the old man's pockets, removing all which might tend to make that worthy dangerous--an ugly looking pistol of large caliber, a blackjack similar to his own and a small bottle. The latter item Jimmie examined curiously, finally uncorking it and inhaling the contents. He inhaled, not wisely but too well. The fumes from the vial were nigh overpowering, and he reeled back nauseated. The cork he hastily replaced. Just what the nature of the powerful stuff was he never attempted to discover. One acquaintance was enough. * * * * * He staggered to his feet and got the lantern lighted, then sat, gun in hand, waiting for his prisoner's return to his senses. This was becoming increasingly imminent, judging by certain changes in the Professor's respiration. Finally there came a series of shuddering movements as the man attempted to raise his battered body.