"But you, Marlin--Hunt--" Whitely continued. "You have learned how and why these Neptunians are sending forth the great ray that is turning the sun faster? We saw that ray and another great ray on opposite sides of Triton--Is it not possible that we alone might be able to halt that ray?" Marlin solemnly shook his head. "No chance, Whitely, for us," he said. "Perhaps no chance even for all the forces of Earth!" And quickly he told, while Whitely and Randall listened enthralled, of the captivity of us two in Triton's strange and swarming world; of the gigantic tale of Neptune's past and the purpose of its peoples, as it had been told us by the great globe of the Council of Thirty; of our desperate escape and flight across the dark side of Triton and our wild crashing upward through the roof and out from Triton. "We alone," Marlin concluded, "can never halt either of those great rays, for each has countless cylinders and Neptunians within to guard it, and each has twenty control-boxes of which one alone can keep it operating. No, our one chance is to get back to Earth, to gather there the great fleet of space-fliers which the World President and the World Congress planned to build in our absence, and to come out in that great fleet with the most powerful weapons available and endeavor to crush these strange Neptunians, to halt that great ray of doom that is turning the sun ever faster! For unless we can do that, unless we can bring Earth's fleet of space-fliers out here and halt the great sun-ray, that ray will in sixty days more have finished its work, will have split the sun and loosed doom upon all its planets except Neptune! And so it is back to Earth that we must race now at our utmost speed!" Marlin's solemn voice ceased, and there was silence for a moment in the space-flier, we four gazing toward each other without speaking. By then the flier, with the tremendous impetus of its flight still driving it forward, had swept on and out over great Neptune now, out of the giant world's cloudy atmosphere and into empty space beyond it. And, with Neptune's giant globe filling the firmament behind us, Randall snapped on again our rear force-ray, sent that ray radiating back toward the vast disk of Neptune itself. And then again we were forced deep in our chairs as the flier's tremendous speed accelerated once more, the flier hurtling with greater and greater velocity through the gulf of space toward the far little disk of fire that was the sun, far ahead. For it was toward it, toward our Earth, that we were going from Neptune, from the solar system's edge, to carry back word to Earth of the nature of the doom that hung above it and to gather Earth's forces to forestall that doom! CHAPTER XIII The Gathering of Earth's Forces