_The other ray!_ The other giant force-ray that went from Triton's outward side, its dark side, into the gulf of interstellar space toward that far star in Sagittarius, the other mighty ray that braced Triton against the great sun-ray's pressure and that kept that sun-ray's pressure from hurling Triton out into the great interstellar void! The other ray--and if it were halted--then Triton--I felt my mind reeling as the stupendous meaning of Marlin's mad shout came home to it! The other ray--guarded by only a half-score of the giant moving domed forts, instead of the hundred beneath us--and then Marlin's voice was tearing across the throbbing, rushing din to my ears and instinctively I had obeyed his order, had shot our space-flier forward at immense speed even as there rushed forward beside us our five hundred and more remaining fliers! I whirled it away from the great pit of the giant sun-ray and over Triton's roof at lightning speed toward its dark side, toward the other giant ray that reached out into interstellar space from that dark side! And as we rushed thus away with reeling speed, we heard the mighty thundering cheers of the Neptunian millions beneath the great roof changing to wild cries of alarm, saw the hundred great domed forts around the sun-ray moving over Triton's roof after us with immense speed, themselves, gliding at utmost velocity on around that roof's smooth surface after us in sudden wild alarm! But, more slow by a little than our massed space-fliers that split the air above Triton they dropped behind us even as we shot forward, even as that colossal roar of rising alarm rolled across Triton's surface beneath the great roof! On--on--like rushing meteors massed close together our space-fliers flashed now, toward Triton's dark side around its surface, and then were whirling around that dark side, were whirling straight toward the colossal other beam, the giant other force-ray that stabbed out opposite from the sun-ray, that stabbed out toward Sagittarius' bright star and by its pressure towards that star kept Triton braced against the sun-ray's outward pressure! Marlin was shouting, screaming an order as we flashed downward, and we caught sight for a moment of the half-score domed forts, left as guards of this other ray's great pit and controls, and then like comets of metal our fliers were thundering down upon them!