"And when all was ready, we transferred by space-cars and by atomic individuation all our necessities from Kygpton to the artificial world Xlarbti. And when everything was prepared, we destroyed the dead-field by duplicate control from Xlarbti, turned our repulsion-power on full against the now useless and dying giant world Kygpton, and swung upon our path. "But our whole universe is incredibly old. It was mature before ever your young suns flamed out of the gaseous nebulae, it was decaying when your molten planets were flung from the central sun, it was dying before the boiling seas had given birth to land upon your sphere. And while we had enough of our own particular electrical food to last us for a million of your years, and enough power to guide Xlarbti to other universes, we had exhausted all the remaining energy of our entire universe. And when we finally left it to dwindle behind us in the black abysses of space, we left it, a dead cinder, devoid of life, vitiated of activity, and utterly lacking in cosmic forces, a universe finally run down. "The universes, as you may know, are set off from each other by totally black and empty abysms, expanses so vast that light-rays have not yet crossed many of them. How did we accomplish the feat of traversing such a gulf? By the simplest of means: acceleration. Why? Because to remain in our universe meant inevitable death. We gambled on the greatest adventure in all the cosmos. * * * * * "To begin with, we circled our universe to the remotest point opposite where we wanted to leave it. We then turned our attraction powers on part way so that the millions of stars before us drew us ahead, then we gradually stepped up the power to its full strength, thus ever increasing our speed. At the same time, as stars passed to our rear in our flight, we turned our repulsion-rays against them, stepping that power up also. "Our initial speed was twenty-four miles per second. Midway in our universe we had reached the speed of your light--186,000 miles per second. By the time we left our universe, we were hurtling at a speed which we estimated to be 1,600,000,000 miles per second. Yet even at that tremendous speed, it took us years to cross from our universe to yours. If we had encountered even a planetoid at that enormous rate, we would probably have been annihilated in white-hot death. But we had planned well, and there are no superiors to our stellar mechanics, our astronomers, our scientists.