Now Saturn and its rings and moons was dwindling swiftly behind us as our great fleet shot forward again from it, out toward Neptune's steady, pale-green little light-spot, and after the hundreds of cylinders fleeing before us toward it. With an acceleration that never before had we dared to risk did we leap forward through the void now, and so awful was the pressure of that acceleration upon us that even with our shock-absorbing apparatus we were crushed almost into unconsciousness by it. Steadily, though, with the last of my consciousness and strength, I held the space-flier's speed and course onward, while close behind us there shot after us with the same terrific acceleration, the fliers of our own fleet. We knew, though, that the Neptunians were fleeing toward their great world at a speed and acceleration as great as ours, for we were not gaining upon them. Their massed hundreds of cylinders, indeed, were not visible to us in the great void ahead except by means of our telescope, but with it we could keep them in view and could check their progress and ours out through the great gulf toward the solar system's edge. Out--out--for hour upon hour we throbbed through the void after those fleeing Neptunian cylinders, out once again toward great Neptune and toward the last mighty battle that was to be ours there. For well we knew that the two thousand and more Neptunian cylinders that had waited for us there at Saturn, that had laid that great ambush in space for us there and then had battled us so fiercely over Saturn, were but a portion of the Neptunian main fleet of cylinders, sent out to delay, and if possible, to destroy us. That great main body of their cylinders, we knew, must number almost double as many craft as our own, and undoubtedly was aware of our coming and was waiting for us at Neptune or near it. And it was the great main body of the Neptunian cylinders that we must overcome, I knew, before ever we could hope to get to Triton and halt there the giant force-ray that was turning the sun on toward the doom of the solar system. And well we knew, too, that in the interval the Neptunians had had time to build many more cylinders, to make their great fleet even greater, and that whatever mighty weapons they had devised in that time we now must face.