* * * * * Slavatsky looked at Dr. Bird's long mobile fingers and an evil leer came over his countenance. "So, Dr. Bird," he said slowly, "you thought to match wits with Ivan Slavatsky, the greatest mind of all the ages. For a time you fooled me when your double was operated on here, but not for long. I presume you thought that we had no way of detecting the substitution? You have discovered differently. Where is your friend, Mr. Carnes?" "Didn't your men leave him in the cabin when you kidnapped me?" Slavatsky looked at Frink inquiringly. "He stayed in the cabin if he was in it when we got there," the leader of the kidnapping gang replied. "He got a full shot of lethane and he's due to be asleep yet. I don't know how this man recovered. I left him there myself." "Fool!" shrieked Slavatsky. "You brought me a double, a dummy whom I wasted my time in operating on. Was the other a dummy, too?" "I didn't enter the cabin." Slavatsky shrugged his shoulders. "If that is all the good the menthium I have injected has done you, I might as well have saved it. It doesn't matter, however: we have the one we wanted. Dr. Bird, it was very thoughtful of you to come here and offer your marvelous brain to strengthen mine. I have no doubt that you will yield even more menthium than Professor Williams did this evening especially as I will extract your entire supply and reduce you to permanent idiocy. I will have no mercy on you as I have on the others I have operated on." Dr. Bird blanched in spite of himself at the ominous words. "You have the whip-hand for the moment, Slavatsky, but my time may come--and if it does, I will remember your kindness. I saw your operation on Professor Williams this evening and know your power. I also know that you stole the idea and the method from Sweigert of Vienna. I saw you inject the fluid you drew into Willis' brain. Shall I tell what else I saw?" It was the dwarf's turn to blanch, but he recovered himself quickly. "Into the chair with him!" he roared. * * * * * Three of the men grasped the doctor and forced him into the chair and Slavatsky started the generator. The violet light bathed Dr. Bird's head and he felt a stiffness and contraction of his neck muscles, and as he tried to shout out his knowledge of Slavatsky's treachery, he found that his vocal chords were paralyzed. Through a gathering haze he could see Carson approaching with an anesthesia cone and the sweet smell of lethane assailed his nostrils. He fought with all his force, but strong hands held him, and he felt himself slipping--slipping--slipping--and then falling into an immense void. His head slumped forward on his chest and Slavatsky shut off the generator. "On the table," he said briefly.