But suddenly he shook his head, pointing ahead and upward, for now the cylinders were flashing upward as well as forward. "It's Triton they're heading toward!" he said. "Triton--Neptune's single moon!" "Triton!" I exclaimed, thunderstruck with amazement. "Then--then--it must be on Triton that the remaining Neptunians now are!" Triton! For it was up toward it, up toward the white, green-tinged moon of Neptune that shone dully in the black vault above and ahead of us, that the eleven cylinders, our own in the lead, were heading! And as they shot out of the last limits of the atmosphere of Neptune, as they flashed forward at swiftly mounting speed still toward the moon, I could but stare at it in amazement. Triton! It was from it, then, that there had come these strange disk-bodied Neptunians who had captured us, who had annihilated our space-flier and our friends. It was on Triton, then, that there must remain whatever Neptunians still were left of those who had built the vast compartment-city that covered all the surface of Neptune itself, who had shielded it with that gigantic floating roof that enclosed all the mighty planet. Yet why had they deserted their vast compartment-city, their great world of Neptune? Why had they left that world for the single moon of Neptune, so much smaller in size? And the giant force-ray that was shooting across space to the sun, turning it ever faster, was it from Neptune then or Triton that that colossal ray was radiating? It seemed to me that these questions were spinning in my head in a kaleidoscopic whirl of enigmas, as our throbbing cylinder and the ten behind it shot on and upward at a great slant toward the dull-gleaming sphere of Triton. Marlin, beside me, was staring ahead obviously as much mystified as I was, while the four Neptunians ranged on either side of us kept their ceaseless watch upon us. The other three sat still at the central control-standard, directing the cylinder on its rush out from Neptune toward its moon. And now, that moon grew larger ahead of us and above us, a strangely-gleaming sphere that seemed still very small, in comparison with the huge pale-green disk of mighty Neptune that loomed behind us.