On-on-moment after moment, hour after dragging hour, our ship hummed through the awful void, flashing with each moment through countless millions of miles of the infinity of blackness and emptiness that lay about us, with the half-thousand ships of the serpent-creatures coming grimly on behind. The far-flung, dim-glowing dying universe behind us glowed even dimmer, diminishing in extent, too, as we shot onward, while before us the shining disk-mass of the Andromeda universe shone ever more brightly; yet it was with a terrifying slowness that that disk largened as we flashed toward it. Tensely I stood with Korus Kan in the pilot room, gazing toward it, and even then could not but reflect upon what a strange spectacle it would all have presented to any observer who could have seen it: a spectacle of one mighty ship pursued by a half-thousand, as it raced through the void from one universe to another, manned by a score of dissimilar beings drawn from the stars of still a third universe, and carrying with them its fate.
But it was with dark enough thoughts, as our ship flashed on for hour upon hour, that I myself contemplated the three universes that lay before and behind and beside us. Before us the Andromeda universe was shining in ever-increasing size and brilliance with each hour that we raced toward it; but what, I wondered, would we find in that universe even were we able to escape the swift and terrible pursuit behind? Was there any chance of finding in it, in the race that held sway over its suns and worlds, the help that could save our galaxy? Was it not possible that even were we able to reach it we would be treated by that race as merely other strangers and invaders from an alien universe?
My eyes swung, too, toward the far little glow of light in the blackness to our left, a patch of misty light that seemed very tiny in the stupendous blackness and emptiness of space that lay about it. Yet my mind's eye, leaping out across the terrific abysses that separated us from it, could see that little light-patch as it was, could make out the throngs of blazing stars that formed it-our galaxy, the giant suns and smaller stars and thronging, far-swinging worlds through which we had roamed with the ships of the Interstellar Patrol. And I could see it as it would be now, convulsed with panic fear, as from their great base of the Cancer cluster the vanguard of the serpent-invaders spread terror and destruction out over the neighboring suns, preparing the way for the mighty host of invaders that was to follow.
But it was when I turned, glancing back to where the dying universe of the serpent-people glowed dim and ominous behind us, decreasing steadily in size as we flashed from it, that my mood was darkest. In that mighty mass of dead and dying suns, I knew, there on the giant world that turned between that central triplet of great, dying suns, the serpent-races were completing their plans, were preparing to launch themselves across the void toward my own universe. Already their vast fleet of tens of thousands of ships was all but complete, and soon would be completed, too, that gigantic death-beam projector whose awful power no force could ever withstand. Our only chance of preventing the descent of that vast horde and their terrible weapon upon our galaxy was to reach the Andromeda universe and procure there, somehow, the aid with which we might return and crush the serpent-people in their own dying universe. And had we a chance even to reach the Andromeda universe, with the half-thousand craft of our serpent-pursuers driving relentlessly on our track?
In the hours that followed, it was as though all else had ceased to exist, so centered were our minds upon that remorseless pursuit. On and on we flashed, our throbbing, beating generators flinging us through the void with their utmost power, but behind came the serpent-ships at their topmost speed, too, and though for forty-eight hours we had raced through space we had covered hardly a third of the distance to the Andromeda universe. As I raised my eyes to the space-chart then, toward our single ship-dot and the swarm of dots behind it, a sharp, cold thrill ran through me. For now I saw that the gap of a few inches that separated us from them on the chart had lessened a little, the swarm drawing noticeably closer toward our single ship-dot. A moment I stared up at the chart in stunned silence; then, with realization, a cry broke from me.
"The serpent-ships!" I cried. "They're overtaking us!"
My cry brought Jhul Din back up into the pilot room, and standing together with eyes riveted upon the space-chart we saw clearly that with every moment, slowly but steadily, the serpent-ships behind were drawing nearer, though we were moving at our utmost speed. Our ship, battered and worn by its tremendous flight through the void from universe to universe, and by the space-fights it had come through, was a fraction slower than the new ships of our pursuers, and that fraction of difference in speed, we saw, was bringing them closer upon us with each passing minute. Yet there was a chance still, we knew, to gain the Andromeda universe before they overtook us; so still at utmost velocity we flashed on, toward the shining universe ahead.
On-on-the hours that followed, while we drove through the awful void with the serpent-ships behind closing slowly and inexorably in upon us, live in my memory only as a strange period of ceaseless, rushing flight, with our eyes always upon the space-chart and upon the brilliant disk-mass of light ahead. Twice we flashed through the outskirts of great heat-regions glowing there in the void, and once past the edge of one of the deadly areas of radio-active vibrations, but ever after passing them our ship swung back toward the universe ahead. That universe, as we hummed on hour upon hour, was changing from a glowing disk of light into a great mass of individual points of light, into a gigantic mass of stars that loomed in greater radiant splendor before us with each passing hour. Green and red and yellow and blue suns we could glimpse among its thronging thousands, and others still white-hot with youth, shining with ever greater brilliance as we drove through the void toward them.
Before us the great universe lay in all its true gigantic glory, when we had covered two-thirds of the distance to it, but by that time our eyes were not upon it at all, but upon the space-chart and the black void behind us; since in the intervening hours the serpent-ships had crept ever closer toward us, their swarm on the space-chart less than an inch behind our racing ship-dot. Even that little gap, in the hours that followed, was lessening, closing, while we three in the pilot room watched it in tense silence. At last, with the blazing mass of suns of the Andromeda universe stretched across the heavens but a dozen hours ahead, we saw that the serpent-swarm on the chart was all but touching our single ship-dot, saw that the end at last was at hand.
"They'll overhaul us in less than an hour." exclaimed Jhul Din. "We'll never even reach the Andromeda universe."
To his outburst we made no answer, gazing in silence up at the big space-chart, watching doom creep upon us. The serpent-swarm had crept still farther upon us until its foremost dots seemed touching our own ship-dot, its foremost racing craft in reach of our own. Then, gazing through the rear distance-windows that projected from the pilot room's sides, the big Spican uttered a low exclamation, pointing mutely backward as we turned toward him. And as we gazed we saw, far behind us there in the lightless void, a swarm of close-massed light-points that steadily was largening, was drawing nearer toward us, toward our doom. For it was the end, I knew. We had escaped death in a hundred forms in the last days, but this we could not escape, for with the Andromeda universe still hours away our chance of escape was gone. Dodge and turn as we might, they would corner us, would hem us in; and though we might destroy one or two of their half-thousand ships, by no miracle could we hope to escape the rest. For a moment a deathly silence held us as we stared back toward those nearing light-points, and then I whirled around to the order-tube.