Chapter 5

From a sufficient height and a sufficient distance, the rocket’s repeated attacks must have appeared like the strikings and twistings of a gigantic snake. It left behind it a writhing trail of fumes which was convincingly serpentine. It climbed and struck, and climbed and struck, like a monstrous python flinging itself furiously at some invisible prey. Six, seven, eight times it plunged frenziedly at the minute egg-shaped ship which scuttled for the heavens. Each time it missed and writhed about to dart again.

Then its fuel gave out and for all intents and purposes it ceased to exist. The thick, opaque trail it left behind began to dissipate. The path of vapor scattered. It spread to rags and tatters of unsubstantiality through which the rocket plummeted downward in the long fall which is a spent rocket’s ending.

Burke cautiously cut down the drive and awkwardly turned the ship on its side, heading it toward the north. The state of things inside the ship was one of intolerable tenseness.

“I’m a new driver,” said Burke, “and that was a tough bit of driving to do.” He glanced at the exterior-pressure meter. “There’s no air outside to register. We must be fifty or sixty miles high and maybe still rising. But we’re not leaking air.”

Actually the plastic ship was eighty miles up. The sunlit world beneath it showed white patches of cloud in patterns a meteorologist would have found interesting. Burke could see the valley of the St. Lawrence River between the white areas. But the Earth’s surface was curiously foreshortened. What was beneath seemed utterly flat, and at the edge of the world all appeared distorted and unreal.

Holmes, still pale, asked, “How’d we get away from that rocket?”

“We accelerated,” said Burke. “It was a defensive rocket. It was designed to knock down jet bomb carriers or ballistic missiles which travel at a constant speed. Target-seeking missiles can lock onto the radar echo from a coasting ship, or one going at its highest speed because their computers predict where their target, traveling at constant speed, can be intercepted. We were never there. We were accelerating. Missile-guidance systems can’t measure acceleration and allow for it. They shouldn’t have to.”

Four of the six television screens showed dark sky with twinkling lights in it. On one there was the dim outline of the sun, reversed to blackness because its light was too great to be registered in a normal fashion. The other screen showed Earth.

There was a buzzing, and Keller looked at Burke.

“Rocket?” asked Burke. Keller shook his head. “Radar?” Keller nodded.

“The DEW line, most likely,” said Burke in a worried tone. “I don’t know whether they’ve got rockets that can reach us. But I know fighter planes can’t get this high. Maybe they can throw a spread of air-to-air rockets, though ... I don’t know their range.”

Sandy said unsteadily, “They shouldn’t do this to us! We’re not criminals! At least they should ask us who we are and what we’re doing!”

“They probably did,” said Burke, “and we didn’t answer. See if you can pick up some voices, Keller.”

Keller twirled dials and set indicators. Voices burst into speech. “_Reporting UFO sighted extreme altitude coördinates--First rocket exhausted fuel in multiple attacks and fell, sir._” Another voice, very brisk, “_Thirty-second squadron, scramble! Keep top altitude and get under it. If it descends within range, blast it!_” Another voice said crisply, “Coördinates three-seven Jacob, one-nine Alfred... “

Keller turned the voices down to mutters because they were useless.

Burke said, “Hell! We ought to land somewhere and check over the ship. Keller, can you give me a microphone and a wavelength somebody will be likely to pick up?”

Keller shrugged and picked up masses of wire. He began to work on an as yet unfinished wiring job. Evidently, the ship was not near enough to completion to be capable of a call to ground. It had taken off with many things not finished. Burke, at the controls, found it possible to think of a number of items that should have been examined exhaustively before the ship left the mould in which it had been made. He worried.

Pam said in a strange voice, “I thought I might rate as a heroine for stowing away on this voyage, but I didn’t think we’d have to dodge rockets and fighter planes to get away!”

There was no comment.

“I’m a beginner at navigation,” said Burke a little later, more worried than before. “I know we have to go out over the north magnetic pole, but how the hell do I find that?”

Keller beamed. He dropped his wiring job and went to the imposing bank of electronic instruments. He set one, and then another, and then a third. The action, of course, was similar to that of an airline pilot when he tunes in broadcasting stations in different cities. From each, a directional reading can be taken. Where the lines of direction cross, there the transport plane must be. But Keller turned to shortwave transmitters whose transmissions could be picked up in space. Presently, eighty miles high, he wrote a latitude and longitude neatly on a slip of paper, wrote “North magnetic pole 93°W, 71°N, nearly,” and after that a course.

“Hm,” said Burke. “Thanks.”

Then there was a relative silence inside the ship. Only a faint mutter of voices came from assorted speakers that Keller had first turned on and then turned down, and a small humming sound from a gyro. When they listened, they could also hear a high sweet musical tone. Burke shifted this control here, and that control there, and lifted his hands. The ship moved on steadily. He checked this and that and the other thing. He was pleased. But there were innumerable things to be checked. Holmes went down the ladder to the other compartment below. There were details to be looked into there, too.

One of the screens portrayed Earth from a height of seventy miles instead of eighty, now. Others pictured the heavens, with very many stars shining unwinkingly out of blackness. Keller got at his wires again and resumed the work of installing a ship-to-ground transmitter and its connection to an exterior-reflecting antenna.

Sandy watched Burke as he moved about, testing one thing after another. From time to time he glanced at the screens which had to serve in the place of windows. Once he went back to the control-board and changed an adjustment.

“We dropped down ten miles,” he explained to Sandy. “And I suspect we’re being trailed by jets down below.”

Holmes meticulously inspected all storage places. He’d packed them when the ship lay on her side.

Burke read an instrument and said with satisfaction, “We’re running on sunshine!”

He meant that in empty space certain aluminum plates on the outside of the hull were picking up heat from the naked sun. The use of the drive-shaft lowered its temperature. Metallic connection with the outside plates conducted heat inward from those plates. The drive-shaft was cold to the touch, but it could drop four hundred degrees Fahrenheit before it ceased to operate as a drive. It was gratifying that it had cooled so little up to this moment.

Later Keller tapped Burke on the shoulder and jerked his thumb upward.

“We go up now?” asked Burke.

Keller nodded. Burke carefully swung the ship to aim vertically. The views of solid Earth slid from previous screens to new ones. The stars and the dark object which was the sun also moved across their screens to vanish and reappear on others. Then Burke touched the drive-control. Once more they had the sensation of being in a rising elevator. And at just that moment spots appeared on the barren, icy, totally flattened terrain below.

They were rocket-trails from target-seeking missiles which had reached the area of the north magnetic pole by herculean effort and were aimed at the radar-detected little ship by the heavy planes that carried them.

From the surface of the Earth, it would have seemed that monstrous columns of foaming white appeared and rose with incredible swiftness toward the heavens. They reached on, up and up and up, seeming to draw closer together as they became smaller in the distance, until all eight of them seemed to merge into a single point of infinite whiteness in the sunshine above the world’s blanket of air.

But nothing happened. Nothing. The ship did not accelerate as fast as the rockets, but it had started first and it kept up longer. It went scuttling away to emptiness and the bottoms of the towers of rocket-smoke drifted away and away over the barren landscape all covered with ice and snow.

When Earth looked like a huge round ball that did not even seem very near, with a night side that was like a curious black chasm among the stars, the atmosphere of tension inside the ship diminished. Keller completed his wiring of a ship-to-ground transmitter. He stood up, brushed off his hands and beamed.

The little ship continued on. Its temperature remained constant. The air in it smelled of growing green stuff. It was moist. It was warm. Keller turned a knob and a tiny, beeping noise could be heard. Dials pointed, precisely.

“We couldn’t go on our true course earlier,” Burke told Sandy, “because we had to get out beyond the Van Allen bands of cosmic particles in orbit around the world. Pretty deadly stuff, that radiation! In theory, though, all we have to do now is swing onto our proper course and follow those beepings home. We ought to be in harmless emptiness here. Do you want to call Washington?”

She stared.

“We need help to navigate--or astrogate,” said Burke. “Call them, Sandy. I’ll get on the wire when a general answers.”

Sandy went jerkily to the transmitter just connected. She began to speak steadily, “Calling Earth! Calling Earth! The spaceship you just shot all those rockets at is calling! Calling Earth!”

It grew monotonous, but eventually a suspicious voice demanded further identification.

It was a peculiar conversation. The five in the small spaceship were considered traitors on Earth because they had exercised the traditional right of American citizens to go about their own business unhindered. It happened that their private purposes ran counter to the emotional state of the public. Hence voices berated Sandy and furiously demanded that the ship return immediately. Sandy insisted on higher authority and presently an official voice identified itself as general so-and-so and sternly commanded that the ship acknowledge and obey orders to return to Earth. Burke took the transmitter.

“My name’s Burke,” he said mildly. “If you can arrange some sort of code, I’ll tell you how to find the plans, and I’ll give you the instructions you’ll need to build more ships like this. They can follow us out. I think they should. I believe that this is more important than anything else you can think of at the moment.”

Silence. Then more sternness. But ultimately the official voice said, “I’ll get a code expert on this.”

Burke handed the microphone to Sandy.

“Take over. We’ve got to arrange a cipher so nobody who listens in can learn about official business. We may use a social security number for a key, or the name of your maiden aunt’s first sweetheart, or something we know and Washington can find out but that nobody else can. Hm. Your last year’s car-license number might be a starter. They can seal up the records on that!”

Sandy took over the job. What was transmitted to Earth, of course, could be picked up anywhere over an entire hemisphere. Somebody would assuredly pass on what they overheard to, say, nations the United States would rather have behind it than ahead of it in space-travel equipment. Burke’s suggestion of a cipher and instructions changed his entire status with authority. They’d rather have had him come back, but this was second best, and they took it.

From Burke’s standpoint it was the only thing to do. He had no official standing to lend weight to his claim that lunatic magnet-cores with insanely complicated windings would amount to space-drive units. If he returned, in the nature of things there would be a long delay before mere facts could overcome theoreticians’ convictions. But now he was forty-five thousand miles out from Earth.

He had changed course to home on the beeping signals from M-387, was accelerating at one full gravity and had been doing so for forty-five minutes. And the small ship already had a velocity of twenty miles per second and was still going up. All the rockets that men had made, plus the Russian manned-probe drifting outward now, had become as much outdated for space travel as flint arrowheads are for war.

Burke returned to the microphone when Sandy left it to get a pencil and paper.

“By the way,” he said briskly. “We can keep on accelerating indefinitely at one gravity. We’ve got radars. We got them from--” He named the supplier. “Now we want advice on how fast we can risk traveling before we’ll be going too fast to dodge meteors or whatnot that the radar may detect. Get that figured out for us, will you?”

He gave back the instrument to Sandy and returned to his inspection of every item of functioning equipment in the ship. He found one or two trivial things to be bettered. The small craft went on in a singularly matter-of-fact fashion. If it had been a bomb shelter buried in the pit beside the mould in which it was built, there would have been very little difference in the feel of things. The constant acceleration substituted perfectly for gravity. The six television screens, to be sure, pictured incredible things outside, but television screens often picture incredible things. The wall-gardens looked green and flourishing. The pumps were noiseless. There were no moving parts in the drive. The gyro held everything steady. There was no vibration.

Nobody could remain upset in such an unexciting environment. Presently Pam explored the living quarters below. Holmes took his place in the control-chair, but found no need to touch anything.

Some time later Sandy reported, “Joe, they say we must be lying, but if we can keep on accelerating, we’d better not hit over four hundred miles a second. They say we can then swing end for end and decelerate down to two hundred, and then swing once more and build up to four again. But they insist that we ought to return to Earth.”

“They don’t mention shooting rockets at us, do they?” asked Burke. “I thought they wouldn’t. Just say thanks and go on working out a code.”

Sandy set to work with pencil and paper. Federal agents would be moving, now, to impound all official records that were in any way connected with any of the five on the ship. The key to the code would be contained in such records. It would be an agglomeration of such items as Burke’s grandmother’s maiden name, Holmes’ social-security number, the name of a street Burke had lived on some years before, the exact amount of his federal income taxes the previous year, the title of a book third from the end on the second shelf of a bookcase in Keller’s apartment, and such unconsidered items as most people can remember with a little effort, but which can only be found out by people who know where to look. These people would keep anybody else from looking in the same places. Such a code would be clumsy to work with, but it would be unbreakable.

It took hours to establish it without the mention of a single word included in the lengthy key. The ship reached four hundred miles a second, turned about, and began to cut down its speed again.

Pam spoke from beside an electric stove, “Dinner’s ready! Come and get it!”

They dined; Sandy weary, Burke absorbed and inevitably worried, Holmes placid and amiable, and Keller beaming and interested in all that went on, which was practically nothing.

They did not see the stars direct, because television cameras were preferable to portholes. Earth had become very small, and as it swung ever more nearly into a direct line between the ship and the sun, night filled more of its disk until only a hairline of sunshine showed at one edge. The microwave receivers ceased to mutter. The working astronomers on Earth who’d sent a message to M-387 were suddenly relieved of their disgrace and set to work again to equip the West Virginia radar telescope for continuous communication with Burke’s ship. Other technicians began to prepare multiple receptors to pick up the ship’s signals from hitherto unprecedented distances for human two-way communication.

And on Earth an official statement went out from high authority. It announced that a hurriedly completed American ship was on the way to M-387 to investigate the signals from space. It announced that measures long in preparation were now in use, and that an invincible fleet of spacecraft would be completed in months, whereas they had not been hoped for for another generation. An unexpected breakthrough had made it possible to advance the science of space travel by many decades, and a fleet to explore all the planets as well as M-387 was already under construction. It was almost true that they were. The blueprints of Burke’s ship had been flown to Washington from the plant, and an enormous number of replicas of the egg-shaped vessel were ordered to be begun immediately, even before the theory of the drive was understood.