Miles and Ward had learned to feel nothing but horror and detestation of the Heads, but now in the face of their tragic end, hearing the dying words of Zoro, awe and sympathy struggled with other emotions in their hearts. These mighty intellects had lived before the days of the flood; their eyes filming now in death had seen the ancient empires of Earth rise and fall.... Sumeria, Babylon.... Stupendous thought; and yet in the face of death a hundred thousand years of life was of no more importance than that of a day. Suddenly Ward sprang forward and shook the fainting Head. "Zoro! Zoro! what of us? We served you faithfully and would now return to Earth." * * * * * Visibly Zoro made a great effort to reply. "Go to the crystal tube in the laboratory beyond," he said at last. "It still works. I have told you how to run the car. Mend the tracks. The locks open automatically and let the car into the ocean when it strikes the switch. Your reward is in...." The words died away. Then, with a sudden influx of strength, the hairless head straightened, the strangely colored eyes cleared, and in a loud voice Zoro called out something in an unknown tongue and then collapsed. Out of that chamber of death the Americans fled, suddenly afraid of its weird occupants. In time the workers of Apex would break into that strange laboratory and find the vampires of the ages dead. And in a very short time Spiro himself would die--Spiro the avenger. At the crystal tube Miles paused. "Ah-eeda," he said softly, "we return to Earth, but I shall never forget you, never!" A moment he hesitated, and then bent and kissed her swiftly. Instantly she was in his arms, clinging to him passionately. "I too," she cried; "I too!" "She means," said Ward, "that she wants to go back with us. What do you say?" "God knows I am tempted to take her," said Miles; "but would it be right? What does she know of Earth?" "Nothing," said Ward; "but I believe she loves you. And have you thought that after helping us to escape she may not be safe among her own people?" Miles bowed his head. "Very well," he said; "so be it. I swear to make her happy." So there were three of them who entered the crystal tube. * * * * *