a certain frequency vibration of the ether, and when that frequency is raised to that of light-vibrations the matter is changed in that moment from solid matter to light.
Even in the moment that the four ships vanished beneath our rays, though, I had glanced backward and had seen the last of the ships of our squadron behind vanishing in a wild chaos of whirling death-beam and crimson ray, since scores of other ships were leaping up to attack us from the mighty swarm far beneath. Toward us now, it seemed, ships were flashing from every direction, and I heard the hissing of the ray-tubes below as our crimson rays burned out to meet them, saw three more of them flare and vanish, glimpsed a dozen shafts of the death- beam graze past us as Korus Kan twisted our ship in an erratic, corkscrew course. Not for moments longer, though, I knew, could we keep up this wild and unequal battle, since the mass of ships behind that had annihilated our squadron were now leaping after us. Our only chance was in flight.
I shouted to Korus Kan, and then, as scores of the ghostly beams swept through the void toward us, I saw him swerve the control-levers in his hands sharply sidewise, so that our ship abruptly turned squarely to the right, away from the great swarm and the attacking ships about us. It was a maneuver that caught those ships off their guard, and traveling as we were at the terrific velocity of five hundred light-speeds, it put millions of miles of space between us and the great swarm before the attacking ships could realize what we had done. In a split-second they had vanished from sight about us and we were again rushing on through black and empty space, turning now, and again heading toward the galaxy's far-flung suns. But, as I gazed anxiously at the big space-chart, I saw that now the great swarm of black dots upon it had slanted from their former course and was heading straight after the single dot that was our ship. By means of their own space-charts, which I knew they must have, they had discovered our trick and were in pursuit.
'Let her out to full speed,' I cried to Korus Kan. 'They're after us and our only chance is to get to the galaxy ahead of them.'
Instantly Korus Kan opened wide the power-controls, and with a mounting humming roar our great ship went rapidly into its highest speed, its great generators flinging it on through the ether at a thousand times the velocity of light, propelling it headlong onward toward the galaxy that lay still far ahead, its mighty disk-like mass of shining suns stretched across the blackness of space before us. And behind us rushed the great swarm, too, racing on after us and toward the galaxy still. I knew that the speed of that mighty swarm of ships must be inconceivably greater than that of our own, since we ourselves had seen them on our charts racing in toward the galaxy from outer space with velocity unthinkable, a velocity which we had thought could only be due to some great ether-current, and which they had only slackened as they drew near the galaxy. There was a slender chance, though, that we might yet escape, and now as we rushed on toward the galaxy in headlong flight I turned quickly to the speech-projection instrument beside me, pressing a button in its base. A moment later there came from it a clear, twanging voice.
'General Patrol Headquarters at Canopus,' it announced, and swiftly I responded.
'Dur Nal, Captain of Patrol Squadron 598-77, speaking,' I said. 'I desire to report the discovery of a swarm of some five thousand strange space-ships which have appeared out of intergalactic space, heading toward the galaxy. These ships are apparently capable of immense speeds and are armed with a form of death-beam unfamiliar to us, but extremely deadly in operation. On discovering these ships we were attacked by them and all of my squadron except my own ship destroyed. Our own ship is now being chased inward toward the galaxy, heading in the general direction of the Cancer cluster, and though the swarm is gradually overhauling us we may be able to escape. From the size, number and deadly armament of these alien ships it is apparent that they contemplate a general attack upon our universe.'
There was a moment's pause when I had finished, and then from the speech-instrument there came the metallic voice again, as calm as though I had made only a routine report of position and progress.
'Order of Lacq Larus, Chief of the Interstellar Patrol, to Dur Nal. You will make every effort to elude the pursuing swarm, and if you can do so will endeavor to draw it into the Cancer cluster. All the cruisers of the Interstellar Patrol will be assembled inside the cluster as swiftly as possible, and if you are successful in drawing the pursuing swarm inside it will be possible for our fleet to fall upon it in an unexpected attack, and destroy these invaders, whatever their source or purpose, before they can obtain a foothold in the galaxy. You have the order?'
'I have the order,' I replied, as calmly as possible, and with a word of acknowledgment the twanging voice ceased.
I wheeled around to Korus Kan and Jhul Din, a flame of excitement leaping within me. 'It's a chance to destroy them all.' I exclaimed. 'If we can hold out until we reach the galaxy-can lead them into that cluster-'
Their own eyes were afire now as they saw the chance, and now Korus Kan tightened his grasp on the controls, gazing grimly ahead with power open to the last notch, while Jhul Din strode swiftly out of the pilot room and down to the ship's hull beneath, where, in a moment more, I heard his deep voice booming out orders to the crew as they labored to wring from our throbbing generators the last ounce of speed. Yet now, too, looking up at the big space-chart, I saw that the gap on it between our single little ship-dot and the great swarm of dots behind was terrifyingly small, a gap of less than a half-inch which represented no more than a few billion miles of space. And slowly, steadily, that gap was closing, as the great swarm slowly overhauled us. With their immense potential speed they could have flashed past us in a moment, had they so desired, yet I knew too that they dared not use such terrific speed so near the galaxy, and that even did they use it we would be able to turn and double before they could slow down enough to catch us. Their plan, it was obvious, was simply to overhaul us slowly until they had just reached us, and then sweep down on us with the death-beams while we strove in vain to escape them.
So at our utmost speed we flashed on through the void toward the galaxy, a mighty belt of burning suns across the blackness before us, and toward the close-massed cluster of suns at its edge that shone among the scattered stars around it like a solid ball of light, while there rushed after us through space at the same mighty speed the great swarm of strange craft which we were attempting to lead into that cluster.
Surely in all time was never so strange a flight, a pursuit, as this one-a flight inward through the void with unimaginable beings from the mysteries of infinite outer space as our pursuers, flashing on in thousands on our track, toward us and toward the galaxy they meant to attack.
Far ahead in that galaxy, too, I knew, its forces would be preparing to meet that attack, and from the central sun of Canopus the alarm would be flashing out across our universe from star to star, from world to whirling world, flashing in warning from end to end of the galaxy, to all the stars and worlds and races of the Federated Suns. And even while that warning flashed, the great star-cruisers of the Interstellar Patrol would be gathering in answer, would be rushing headlong between the suns across the galaxy from every quarter of it to mass in force inside the Cancer cluster. Could we escape the pursuing swarm and lead it into that cluster it would still be hours, I knew, before we reached it, even at our tremendous speed, and in those hours all the fighting-ships of the galaxy would be racing toward the rendezvous there and massing to meet this mighty invading fleet.
Could we escape? The thought beat monotonously through my brain as I stood there with Korus Kan, silent as the Antarian as we watched the great swarm of dots creep closer and closer to us on the space-chart. On and on our ship was racing, the throbbing generators now making the whole ship vibrate with their vast power, and visibly the galaxy's shining suns were largening ahead as we flashed on toward them; yet as the minutes passed, forming into an hour, and then another, the great swarm behind crept ever remorselessly closer. Rocking and swaying as we plunged through great ether-currents, we held still straight toward the Cancer cluster, at the galaxy's edge ahead; yet still we had covered no more than two-thirds of the distance that had separated us from it, and now the great swarm was no more than a few million miles behind, a mere fraction of an inch on the space- chart.
It was as though our pursuers were but playing with us, so calmly and steadily did they overtake us, and in despair I turned from the galaxy's mighty rampart of stars, ahead, to the rear distance-windows. A moment more, I knew, and the thousands of ships behind would be drawing into sight in those windows, would be speeding down upon us even as we sought to flee and would annihilate us with an attack which we could not hope to escape a second time. Hopelessly I gazed back into the blackness of space behind, but then wheeled back suddenly as there came a sudden exclamation from Korus Kan. He had swerved our flying ship's course a little and was pointing up toward the space-chart now, his strange eyes agleam with excitement.
'If we can make it, it's a chance to throw them off our track,' he exclaimed, and as I gazed up toward the
