"And her brother Carlos," went on the voice, "see that he, too, is admitted. I wish, for certain reasons, that Charmion come unharmed through the direct attack I am about to make against your country. I confess that, save for this ability to speak to you, I am unable to work any damage to the Secret Room, which is therefore the safest place for Charmion Kane! Carlos Kane is being spared because he is her brother!" There was no mistaking the import of this sinister command from Moyen. He had singled out Charmion, the best beloved of Prester Kleig, for his attentions, and that he was sure of the success of his attack against the United Americas was proved by the calm assurance of his voice, and the fact that, concentrating on the attack as he must be, he still found time for a thought of Charmion Kane. * * * * * The hand of ice which had seldom been absent from the heart of Kleig since he had first seen and heard the voice of Moyen gripped him anew. Blood pounded maddeningly in his temples. Cold sweat bathed his body. But the rest of the Secret Agents, save to freeze into immobility when the hated voice spoke, gave no sign. They had worries of their own, for no instructions had been given that they bring their own loved ones into the sanctuary of the Secret Room. As though answering the thoughts of the others, the hated voice spoke again. "I regret that I cannot arrange for sanctuary for the loved ones of all of you, for you are gallant antagonists; why save the few, when the many must perish? For I know you will not surrender, however much I have proved to you that I am invincible. But Charmion Kane must be saved." "God!" whispered Kleig. "God!" Then spoke General Munson. "I think this ray which the Moyenites use is a variation of the principle used in the intricate machinery of Professor Maniel, though how they render it visible I do not know. But it doesn't matter, and may be only a blind! You'll note that when the black streak, or the golden ray, strikes anything that thing instantly disintegrates. A certain pitch of resonance will break a pane of glass. It's a matter of vibration, solely, wherein the molecules composing any object animate or inanimate, are hurled in all directions instantaneously. "Professor Maniel's apparatus, the Vibration-Retarder, is able to recapture the vibrations, speeding outward endlessly through space, and to reconstruct, and _draw back_ to visibility the objects destroyed by this visible vibratory ray, whatever it is. This problem, then, falls into the province of Professor Maniel!" * * * * * Through the heart and soul of Prester Kleig there suddenly flowed a great surge of hope. "General Munson, if you will operate the machinery of the Vibration-Retarder, I wish to talk with Professor Maniel!"