"Morey, pull down the wall over that door to block their passage," Arcot ordered. "I'll get the other wall."

Arcot pointed his pistol and triggered it. The outer wall flew outward in an explosion of flying masonry. He switched on his radio and called the Ancient Mariner.

"Wade! We were cut off because of the metal in the walls! We've been doublecrossed—they tried to jump us. Torlos warned us in time. We've torn out the wall; just hang outside with the airlock open and wait for us. Don't use the rays, because we'll be invisible, and you might hit us."

Suddenly the room rocked under an explosion, and the debris Morey's ray had torn down over the door was blasted away. A score of men leaped through the gap before the dust had settled. Morey beamed them down mercilessly before they could fire their weapons.

More of the courageous, but foolhardy Satorians leaped through the opening and stared in bewilderment as they saw no one moving. Arcot, Morey, and Torlos were hanging invisible in the air above them.

Just then, the shining bulk of the Ancient Mariner drifted into view. They drew back behind the wall and sought shelter. One of them began to fire his compressed air gun at it with absolutely no effect; the heavy lux walls might as well have been hit by a mosquito.

As the airlock swung open, Arcot and Morey headed out through the breach in the wall. A moment later, they were inside the ship. The heavy door hissed closed behind them as they settled to the floor.

"I'll take the controls," Arcot said. "Morey, head for the rear; you take the moleculars and take Torlos with you to handle the heat beam." He turned and ran toward the control room, where Wade and Fuller were waiting. "Wade, take the forward molecular beams; Fuller, you handle the heat projector."

Arcot strapped himself into the control chair.

Suddenly, there was a terrific explosion, and the titanic mass of the ship was rocked by the detonation of a bomb one of the men in the building had fired at the ship.

Torlos had evidently understood the operation of the heat beam projector quickly; the stabbing beam reached out, and the great tower, from floor to roof, suddenly leaned over and slumped as the entire side of the building was converted into a mass of glowing stone and molten steel. Then it crashed heavily to the ground a half mile below.

But already there were forty of the great battleships rising to meet them.

Arcot snapped the ship into invisibility and darted to one side. The enemy ships suddenly halted in their wild rush and looked around in amazement for their opponent.

Arcot was heading for the magnetic force field which surrounded the city when Torlos made a mistake. He turned the powerful heat beam downwards and picked off an enemy battleship. It fell, a blazing wreck, but the ray touched a building behind it, and the ionized air established a conducting path between the ship and the planet.

The apparatus was not designed to make a planet invisible, but it made a noble effort. As a result one of the tubes blew, and the Ancient Mariner was visible again. Arcot had no time to replace the tube; the Satorian fleet kept him too busy.

Arcot drove the ship, shooting, twisting upward; Wade and Morey kept firing the molecular beams with precision. The pale rays reached out to touch the battleship, and wherever they touched, the ships went down in wreckage, falling to the city below. In spite of the odds against it, the Ancient Mariner was giving a good account of itself.

And always, Arcot was working the ship toward the magnetic wall and the base of the city.

Suddenly, giant pneumatic guns from below joined in the battle, hurling huge explosive shells toward the Earth-ship. They managed to hit the Ancient Mariner twice, and each time the ship was staggered by the force of the blast, but the foot-thick armor of lux metal ignored the explosions.

The magnetic rays touched them a few times, and each time Torlos was thrown violently to the floor, but the ship was in the path of the beams for so short a time that he was not badly injured. He more than made up for his injuries with the ray he used, and Morey was no mean gunner, either, judging from the work he was doing.

Arcot finally managed to reach the magnetic wall.

"Wade!" he called. "Get that projector building!"

A molecular beam reached down, and the black metal dome sailed high into the sky, breaking the solidity of the magnetic wall. An instant later, the Ancient Mariner shot through the gap. In a few moments, they would be far away from the city.

Torlos seemed to realize this. Moving quickly, he pushed Morey away from the molecular beam projector, taking the controls away from him.

He did not realize the power of that ray; he did not know that these projectors could move whole suns out of their orbits. He only knew that they were destructive. They were several miles from the city when he turned the projector on it, after twisting the power control up.

To his amazement, he saw the entire city suddenly leap into the air and flash out into space, a howling meteor that vanished into the cloudbank overhead. Behind it was a deep hole in the planet's surface, a mighty chasm lined with dark granite.

Torlos stared at it in amazement and horror.

Arcot turned back slowly, and they sailed over the spot where the city had been. They saw a dozen or so battleships racing away from them to spread the news of the disaster; they were the few which had been fortunate enough to be outside the city when the beam struck.

Arcot maneuvered the ship directly over the mighty pit and sank slowly down, using the great searchlights to illuminate the dark chasm. Far, far down, he could see the solid rock of the bottom. The thing was miles deep.

Arcot signalled Morey, who had come into the control room, to take over the controls of the ship. "Head out into space, Morey. I want to find out why Torlos pulled that last stunt. Wade, will you put a new tube in the invisibility unit?"

"Sure," Wade replied. "By the way, what happened back there? We were surprised as the very devil to hear you yelling for help; everything seemed peaceful up to then."

Arcot flexed his bruised hands and grinned ruefully. "Plenty happened." He went on to explain to Wade and Fuller what had happened in their meeting with the Satorian Commander.

"Nice bunch of people to deal with," Wade said caustically. "They tried to get everything and lost it all. We would have given them plenty if they'd been decent about it. But what sort of war is this that the people of these two planets are carrying on, anyway?"

"That's the question I intend to settle," replied Arcot. "We haven't had an opportunity to talk to Torlos yet. He had just admitted to me that he was a spy for Nansal when the fun began, and we've been too busy to ask questions ever since. Come on, let's go into the library."

Arcot indicated to Torlos that he was to go with him. Wade and Fuller followed.

When they had all seated themselves, Arcot began the telepathic questioning. "Torlos, why did you force Morey to leave the ray and then destroy the city? You certainly had no reason to kill all the non-combatant women and children in that city, did you? And why, after I told you absolutely not to use the heat beam while we were invisible, did you use the rays on that battleship? You made our invisibility break down and destroyed a tube. Why did you do this?"

"And I did not intend to destroy the city. I was only trying to tear up the factory that builds these battleships; I only wanted to destroy their machines. I had no conception of the power of that ray. I was as horrified to see the city disappear as you were; I only wanted to protect my people." Torlos smiled bitterly. "I have lived among these treacherous people for many years, and I cannot say that I had no provocation to destroy their city and everyone in it. But I had no intention of doing it, Earthman."

Arcot knew he was sincere. There could be no deception when communicating telepathically. He wished he had used it when communicating with the Commanding One of Sator; the trouble would have been stopped quickly!

"You still do not have any conception of the magnitude of the power of that beam, Torlos," Arcot told him. "With the rays of this ship, we tore a sun from its orbit and threw it into another. What you did to that city, we could do to the whole planet. Do not tamper with forces you do not understand, Torlos.

"There are forces on this ship that would make the energies of your greatest battleship seem weak and futile. We can race through space a billion times faster than the speed of light; we can tear apart and destroy the atoms of matter; we can rip apart the greatest of planets; we can turn the hurtling stars and send them where we want them; we can curve space as we please; we can put out the fires of a sun, if we wish.

"Torlos, respect the powers of this ship, and do not release its energies unknowingly; they are too great."

Then he himself had touched a button, and the giant city had shot off into space, leaving behind it only a screaming tornado and a vast chasm in the crust of the blasted planet.

He could not appreciate the full significance of the velocities Arcot had told him about—he only knew that he had made a bad mistake in underrating the powers of this ship! "I will not touch these things again without your permission, Earthman," Torlos promised earnestly.

The Ancient Mariner drove on through space, rapidly eating up the millions of miles that separated Nansal from Sator. Arcot sat in the control room with Morey discussing their passenger.

"You know," Arcot mused, "I've been thinking about that man's strength; an iron skeleton doesn't explain it all. He has to have muscles to move that skeleton around."

"He's got muscles, all right," Morey grinned. "But I see what you mean; muscles that big should tire easily, and his don't seem to. He seems tireless; I watched him throw those men one after another like bullets from a machine gun. He threw the last one as violently as the first—and those men weighed over three hundred pounds! Apparently his muscles felt no fatigue!"

"There's another thing," pointed out Arcot. "The way he was breathing and the way he seemed to keep so cool. When I got through there, I was dripping with sweat; that hot, moist air was almost too much for me. Our friend? Cool as ever, if not more so.

"And after the fight, he wasn't even breathing heavily!"

"I noticed it," Arcot said. "He started breathing before the fight started. A human being can fight very swiftly, and with tremendous vigor, for ten seconds, putting forth his best effort, and only breathe once or twice. For another two minutes, he breathes more heavily than usual. But after that, he can't just slow down back to normal. He has used up the surplus oxygen in his system, and that has to be replaced; he has run into 'oxygen debt'. He has to keep on breathing hard to get back the oxygen surplus his body requires.

"But not Torlos! No fatigue for him! Why? Because he doesn't use the oxygen of the air to do work, and therefore his body is not a chemical engine!"

Morey nodded slowly. "I see what you're driving at. His body uses the heat energy of the air! His muscles turn heat energy into motion the same way our molecular beams do!"

"Exactly—he lives on heat!" Arcot said. "I've noticed that he seems almost cold-blooded; his body is at the temperature of the room at all times. In a sense, he is reptilian, but he's vastly more efficient and greatly different than any reptile Earth ever knew. He eats food, all right, but he only needs it to replace his body cells and to fuel his brain."

"Oh, brother," said Morey softly. "No wonder he can do the things he did! Why, he could have kept up that fight for hours without getting tired! Fatigue is as unknown to him as cold weather. He'd only need sleep to replace worn parts. His world is warm and upright on its axis, so there are no seasons. He couldn't survive in the Arctic, but he's obviously the ideal form of life for the tropics."

Wade and Fuller had been trying to speak with Torlos telepathically, and had evidently run into difficulty, for Fuller called into the control room: "Hey, Arcot, come here a minute! I thought telepathy was a universal language, but this guy doesn't get our ideas at all! And we can't make out some of his. Just now, he seemed to be thinking of 'nourishment' or 'food', and I found out he was thinking of 'heat'!"

"I'll be right down," Arcot told him, heading for the library.

As he entered, Torlos smiled at him; Arcot picked up his thought easily: "Your friends do not seem to understand my thoughts."

"We are not made as you are," Arcot explained, "and our thought forms are different. To you, 'heat' and 'food' are practically the same thing, but we do not think of them as such."

He continued, explaining carefully to Torlos the differences between their bodies and their methods of using energy.

"Stone bones!" Torlos thought in amazement. "And chemical engines for muscles! No wonder you seem so weak. And yet, with your brains, I would hate to have to fight a war with your people!"

"Which brings me to another point," Arcot continued. "We would like to know how the war between the people of Sator and the people of Nansal began. Has it been going on very long?"

Torlos nodded. "I will tell you the story. It is a history that began many centuries ago; a history of persecution and rebellion. And yet, for all that, I think it an interesting history.

"Hundreds of years ago, on Nansal ..."

Hundreds of years ago, on Nansal, there had lived a wise and brilliant teacher named Norus. He had developed an ideal, a philosophy of life, a code of ethics. He had taught the principles of nobility without arrogance, pride without stubbornness, and humility without servility.

About him had gathered a group of men who began to develop and spread his ideals. As the new philosophy spread across the planet, more and more Nansalians adopted it and began to raise their children according to its tenets.

But no philosophy, however workable, however noble, can hope to convert everyone. There always remains a hard core of men who feel that "the old way is the best way". In this case, it was the men whose lives had been based on cunning, deceit, and treachery.

One of these men, a brilliant, but warped genius, named Sator, had built the first spaceship, and he and his men had fled Nansal to set up their own government and free themselves from the persecution they believed they suffered at the hands of the believers of Norus.

They fled to the second planet, where the ship crashed and the builder, Sator, was killed. For hundreds of years, nothing was heard of the emigrants, and the people of Nansal believed them dead. Nansal was at peace.

In time, the Satorians rediscovered the space drive, but by this time, living on the new planet had changed them physically. They were somewhat smaller than the Nansalians, and lighter in color, for their world was always sunless. The warm rays of the sun had tanned the skins of the Nansalians to a darker color.

When the Satorians first came to Nansal, it was presumably in peace. After so many hundreds of years without war, the Nansalians accepted them, and trade treaties were signed. For years, the Satorians traded peacefully.

In the meantime, Satorian spies were working to find the strengths and weaknesses of Nansal, searching to discover their secret weapons and processes, if any. And they rigorously guarded their own secrets. They refused to disclose the secrets of the magnetic beam and the magnetic space drive.

Finally, there were a few of the more suspicious Nansalians who realized the danger in such a situation. There were three men, students in one of the great scientific schools of Nansal, who realized that the situation should be studied. There was no law prohibiting the men of Nansal from going to Sator, but it seemed that Nature had raised a more impenetrable barrier.

All Nansalians who went to Sator died of a mysterious disease. A method was found whereby a man's body could be sterilized, bacteriologically speaking, so he could not spread the disease, and this was used on all Satorians entering Nansal. But you can't sterilize a whole planet. Nansalians could not go to Sator.

They had bleached their faces, and surgeons, working from photographs, changed their features so that the three Nansalians were exact doubles of the three astrogators. Then they acted. On three trips, one of the men that went back as navigator was a Nansalian.

It was six years before they returned to Nansal, but when they finally did, they had learned two things.

In the first place, the 'disease' which had killed Nansalians who had come in contact with Satorians on Nansal was nothing but a poison which acted on contact with the skin. The Nansalians who had gone to Sator had simply been murdered. There was no disease; it had simply been a Satorian plot to keep Nansalians from going to Sator.

The second thing they had learned was the secret of the Satorian magnetic space drive.

It was common knowledge on Sator that their commander would soon lead them across space to conquer Nansal and settle on a world of clear air and cloudless skies, where they could see the stars of space at night. They were waiting only until they could build up a larger fleet and learned all they could from the Nansalians.

They attacked three years after the three Nansalian spies returned with their information.

During those three years, Nansal had secretly succeeded in building up a fleet of the magnetic ships, but it went down quickly before the vastly greater fleet of the Satorians. Their magnetic rays were deadly, killing everyone they struck. They could lift the iron-boned Nansalians high into the air, then drop them hundreds of feet to their death.

The buildings, with their steel and iron frames, went down, crushing hundreds of others. They practically depopulated the whole planet.

Enough men reached the caverns before the disaster struck to carry on. They had been chosen from the strongest, healthiest, and most intelligent that Nansal had. They lived there for over a century, while the planet was overrun by the conquerors and the cities were rebuilt by the Satorians.

During this century, the magnetic ray shield was developed by the hidden Nansalians. Daring at last to face their conquerors, they built a city on the surface and protected it with the magnetic force screen.

By the time the Satorians found the city, it was too late. A battle fleet was mobilized and rushed to the spot, but the city was impregnable. The great domed power stations were already in operation, and they were made of nonmagnetic materials, so they could not be pulled from the ground. The magnetic beams were neutralized by the shield, and no ship could pass through it without killing every man aboard.

That first city was a giant munitions plant. The Nansalians built factories there and laughed while the armies of Sator raged impotently at the magnetic barrier. They tried sending missiles through, but the induction heating in every metal part of the bombs either caused them to explode instantly or to drop harmlessly and burn.

In the meantime, the men of Nansal were building their fleet. The Satorians stepped up production, too, but the Nansalians had developed a method of projecting the magnetic screen. Any approaching Satorian ship had its magnetic support cut from under it, and it crashed to the ground.

It took nearly thirty years of hard work and harder fighting for the Nansalians to convince the people of Sator that Nansal and the philosophy of Norus had not only not been wiped out, but was capable of wiping out the Satorians.

There were only three enemy cities left on Nansal when, somehow, they managed to learn the secret of the magnetic screen.

By this time, the forces of Nansal had increased tremendously, and they developed the next surprise for the Satorians. One after another, the three remaining cities were destroyed by a barrage of poison gas.

The fleet of Sator tried to retaliate, but the Nansalians were prepared for them. Every building had been sealed and filters had been built into the air conditioning systems.

Shortly, the men of Nansal were again in control of their planet, and the fleet stood guard over the planet.

The Satorians, beaten technologically, were still not ready to give up. Falling back on their peculiar philosophy of life, they pulled a trick the Nansalians would never have thought of. They sued for peace.

The government of Nansal was willing; they had had enough of bloodshed. They permitted a delegation to arrive. The ship was escorted into the city and the parleying began.

The Satorian delegation asked for absolutely unreasonable terms. They demanded fleet bases on Nansal; they demanded an unreasonable rate of exchange between the two powers, one which would be highly favorable to Sator; they wanted to impose fantastic restrictions on Nansalian travel and none whatsoever on their own.

Month followed month and months became years as the diplomats of Nansal tried, patiently and logically, to show the Satorians how unreasonable their demands were.

Not once did they suspect that the Satorians had no intention of trying to get the conditions they asked for. Their sole purpose was to drag the parleying on and on, bickering, quarreling, demanding, and conceding just enough to give the Nansalians hope that a treaty might eventually be consummated.

When they were ready to attack, the Satorian delegation told Nansal frankly that they would not treaty with them. The day the delegation left, the Satorian fleet swept down upon Nansal!

The Nansalians were again beaten back into their cities, safe behind their magnetic screens, but unable to attack. But the forces of Sator had not won easily—they had, in fact, not won at all. Their supply line was too long and their fleet had suffered greatly at the hands of the defenders of Nansal.

For a long while, the balance of power was so nearly equal that neither side dared attack.

Then the balance again swung toward Nansal. A Nansalian scientist discovered a compact method of storing power. Oddly enough, it was similar to the method Dr. Richard Arcot had discovered a hundred thousand light centuries away! It did not store nearly the power, and was inefficient, but it was a great improvement over their older method of generating energy in the ship itself.

The Nansalian ships could be made smaller, and lighter, and more maneuverable, and at the same time could be equipped with heavier, more powerful magnetic beam generators.

Very shortly, the Satorians were again at the mercy of Nansal. They could not fight the faster, more powerful ships of the Nansalians, and again they went down in defeat.

And again they sued for peace.

This time, Nansal knew better; they went right on developing their fleet while the diplomats of Sator argued.

But the Satorians weren't fools; they didn't expect Nansal to swallow the same bait a second time. Sator had another ace up her sleeve.

Ten days after they arrived, every diplomat and courier of the Satorian delegation committed suicide!

Two days later, Nansal realized it had been tricked again. A horrible disease broke out and spread like wildfire. The incubation period was twelve days; during that time it gave no sign. Then the flesh began to rot away, and the victim died within hours. No wonder the ambassadors had committed suicide!

Millions died, including Torlos' own father, during the raging epidemic that followed. But, purely by lucky accident, the Nansalian medical research teams came up with a cure and a preventive inoculation before the disease had spread over the whole planet.

Sator's delegation had inoculated themselves with the disease and, at the sacrifice of their own lives, had spread it on Nansal. Although the Satorians had developed the horribly virulent strain of virus, they had not found a cure; the diplomats knew they were going to die.

Having managed to stop the disease before it swept the planet, the Nansalians decided to pull a trick of their own. Radio communication with Sator was cut off in such a way as to lead the Satorian government to believe that Nansal was dying of the disease.

The scientists of Sator knew that the virus was virulent; in fact, too virulent for its own good. It killed the host every time, and the virus could not live outside a living cell. They knew that shortly after every Nansalian died, the virus, too, would be dead.

Their fleet started for Nansal six months after radio contact had broken off. Expecting to find Nansal a dead planet, they were totally unprepared to find them alive and ready for the attack. The Satorian fleet, vastly surprised to find a living, vigorous enemy, was totally wiped out.

Stalemate.

Torlos spread his hands eloquently. "That is the history of our war. Can you wonder that my people were suspicious when your ship appeared? Can you wonder that they drove you away? They were afraid of the men of Sator; when they saw your weapons, they were afraid for their civilization.

"On the other hand, why should the men of Sator fear? They knew that our code of honor would not permit us to make a treacherous attack.

"I regret that my people drove you away, but can you blame them?"

Arcot had to admit that he could not. He turned to Morey. "They were certainly reasonable in driving us from their cities; experience has taught them that it's the safest way. A good offense is always the best defense.

"But experience has taught me that, unlike Torlos, I have to eat. I wonder if it might not be a good idea to get a little rest too—I'm bushed."

"Good idea," agreed Morey. "I'll ask Wade to stand guard while we sleep. If Torlos wants company, he can talk to Wade as well as anyone. I'm due for some sleep myself."

Arcot, Morey, and Fuller went to their rooms for some rest. Arcot and Morey were tired, but after an hour, Fuller rose and went down to the control room where Wade was communicating telepathically with Torlos.

"I tried to, but I couldn't get in tune. What have you been doing?"

"I've been talking with Torlos—and with fair success. I'm getting the trick of thought communication," Wade said enthusiastically. "I asked Torlos if he wanted to sleep, and it seems that they do it regularly, one day in ten. And when they sleep, they sleep soundly. It's more of a coma, something like the hibernation of a bear or a possum.

"If you want to do business with Mr. John Doe, and he happens to be asleep, your business will have to wait. It takes something really drastic to wake these people up.

"I remember a remark one of my classmates made while I was going to college. He was totally unconscious of the humor in the thing. He said: 'I've got to go to more lectures. I've been losing a lot of sleep.'

"He intended them to be totally disconnected thoughts, but the rest of us knew his habits, and we almost knocked ourselves out laughing.

"I was just wondering what would happen if a Nansalian were to drop off in class. They'd probably have to call an ambulance or something to carry him home!"

Fuller looked at the giant. "I doubt it. One of his classmates would just tuck him under his arm and take him on home—or to the next lecture. Remember, they only weigh about four hundred pounds on Nansal, which is no more to them than fifty pounds is to us."

"True enough," Wade agreed. "But you know, I'd hate to have him wrap those arms of his about me. He might get excited, or sneeze or something, and—squish!"

"You and your morbid imagination." Fuller sat down in one of the seats. "Let's see if we can't get a three-way conversation going; this guy is interesting."

Arcot and Morey awoke nearly three hours later, and the Earthmen ate their breakfast, much to Torlos' surprise.

"So that's why they don't have any farms!" Fuller said.

"Our food is grown out on the plains outside the cities, where there is room," Arcot explained. "It's difficult, but we have machines to help us. We could never have developed the cone type of city you have, however, for we need huge huge quantities of food. If we were to seal ourselves inside our cities as your people have to protect themselves from enemies, we would starve to death very quickly."

"You know," Morey said, "I'll have to admit that Torlos' people are a higher type of creation than we are. Man, and all other animals on Earth, are parasites of the plant world. We're absolutely incapable of producing our own foods. We can't gather energy for ourselves. We're utterly dependent on plants.

"But these men aren't—at least not so much so. They at least generate their own muscular energy by extracting heat from the air they breathe. They combine all the best features of plants, reptiles, and mammals. I don't know where they'd be classified biologically!"

After the meal, they went to the control room and strapped themselves into the control seats. Arcot checked the fuel gauge.

"We have plenty of lead left," he said to Morey, "and Torlos has assured me that we will be able to get more on Nansal. I suggest we show him how the space control works, so that he can tell the Nansalian scientists about it from personal experience.

"In this sun's gravitational field, we'll lose a lot of power, but as long as it can be replaced, we're all right."

Turning to the Nansalian, Arcot pointed out towards the little spark of light that was Torlos' home planet. "Keep your eyes on that, Torlos. Watch it grow when we use our space control drive."

Arcot pushed the little red switch to the first notch. The air around them pulsed with power for an instant, then space had readjusted itself.

There was a sudden splintering crash, and Arcot jerked open the circuit in alarm. They were almost motionless again as the stars reeled about them.

Torlos had been nervous. Like any man so effected, he had unconsciously tightened his muscles. His fingers had sunk into the hard plastic of the arm rest on his chair, and crushed it as though it had been put between the jaws of a hydraulic press!

"I'm glad we weren't holding hands," said Wade, eyeing the broken plastic.

"I am very sorry," Torlos thought humbly. "I did not intend to do that. I forgot myself when I saw that planet rushing at me so fast." His chagrin was apparent on his face.

Arcot laughed. "It is nothing, Torlos. We are merely astonished at the terrific strength of your hand. Wade wasn't worried; he was joking!"

Torlos looked relieved, but he looked at the splintered arm rest and then at his hand. "It is best that I keep my too-strong hands away from your instruments."

The ship was falling toward Nansal at a relatively slow rate, less than four miles a second. Arcot accelerated toward the planet for two hours, then began to decelerate. Five hundred miles above the planet's surface, their velocity cut the ship into a descending spiral orbit to allow the atmosphere to check their speed.

The outer lux hull began to heat up, and he closed the relux screens to cut down the radiation from it. When he opened them again, the ship was speeding over the broad plains of the planet.

Torlos, his eyes shining, directed the Earthmen to his home city, the capital of the world-nation.

"Is there no traffic between the cities here, Torlos?" Morey asked. "We haven't seen any ships."

"There's continuous traffic," Torlos replied, "but you have come in far to the north, well away from the regularly scheduled routes. The commerce must be densely populated with warships as well, and both warships and commercial craft are made to look as much alike as possible so that the enemy can not know when ships of war are present and when they are not, and their attacks are more easily beaten off. They are forced to live off our commerce while they are here. Before we invented the magnetic storage device, they were forced to get fuel from our ships in order to make the return journey; they could not carry enough for the round trip."

Suddenly his smile broadened, and he pointed out the forward window. "Our city is behind that next range of mountains!"

They were flying at a height of twenty miles, and the range Torlos indicated was far off in the blue distance, almost below the horizon. As they approached them, the mountains seemed to change slowly as their perspective shifted. They seemed to crawl about on one another like living things, growing larger and changing from blue to blue-green, and then to a rich, verdant emerald.

Soon the ship was rocketing smoothly over them. Ahead and below, in the rocky gorge of the mountains, lay a great cone city, the largest the Earthmen had yet seen. As they approached, they could see another cone behind it—the city was a double cone! They resembled the circus tents of two centuries earlier, connected by a ridge.

"But we won't have to build more fortifications," Torlos continued, "if you will give us the secret of the rays you use!

"But, Arcot, you must hide in the hills now; drop down and deposit me in the hills. I will walk to the city on foot.

"I will be able to identify myself, and I will soon be inside the city, telling the Supreme Three that I have salvation and peace for them!"

"I have a better idea," Arcot told him. "It will save you a long walk. We'll make the ship invisible, and take you close to the city. You can drop, say ten feet from the ship to the ground, and continue from there. Will that be all right?"

Torlos agreed that it would.

Invisible, the Ancient Mariner dove down toward the city, stopping only a few hundred feet from the base of the magnetic wall, near one of the gigantic beam stations.

"I will come out in a one-man flier, slowly, and at low altitude, toward that mountain there," Torlos told Arcot, pointing. "Then you may become visible and follow me into the city.

"You need fear no treachery from my people," he assured them. Then, smiling: "As if you need fear treachery from the hands of any people! You have certainly proven your ability to defend yourselves!

Torlos paused a moment, then asked: "Is there any message you wish me to give the Supreme Council of Three?"

"Yes," replied Arcot. "Repeat to them the offer we so foolishly made to the Commanding One of Sator. We will give them the molecular ray which tore the city out of the ground, and, as your people have seen, also tore a mountain down. We will give them our heat beam, which will melt anything except the material of which this ship is made. And we will give them the knowledge to make this material, too.

"Best of all, we will give them the secret of the most terrific energy source known to mankind; the energy of matter itself. With these in your hands, Sator will soon be peaceful.

"In return, we ask only two things. They will cost you almost nothing, but they are invaluable to us. We have lost our way. In the vastness of space, we can no longer locate our own galaxy. But our own Island Universe has features which could be distinguished on an astronomical plate, and we have taken photographs of it which your astronomers can compare with their own to help us find our way back.

"In addition, we need more fuel—lead wire. Our space control drive does not use up energy except in the presence of a strong gravitational field; most of it is drained back into our storage coils, with very little loss. But we have used it several times near a large sun, and the power drainage goes up exponentially. We would not have enough to get back home if we happened to run into any more trouble on the way."

Arcot paused a moment, considering. "Those two things are all we really need, but we would like to take back more, if your Council is willing. We would like samples of your books and photographs and other artifacts of your civilization to take back home to our own people.

"That, and peace, are all we ask."

"Very well, then. We will wait for you. Good luck!"

Torlos turned and jumped out of the airlock. The ship rose high above him as he suddenly became visible on the plain below. He was running toward the city in great leaps of twenty feet—graceful, easy leaps that showed his tremendous power.

Suddenly, a ship was darting down from the city toward him. As it curved down, Torlos stopped and made certain signals with his arms, then he stood quietly with his hands in the air.

The ship hovered above him, and two men dropped thirty feet to the ground and questioned him for several minutes.

Finally, they motioned to the ship, which dropped to ten feet, and the three men leaped lightly to its door and entered. The door snapped shut, and the ship shot toward the city. The magnetic wall opened for a moment, and the ship shot through. Within seconds, if was out of sight, lost in the busy air traffic above the city.

"Well," said Arcot, "now we go back to the hills and wait."

For two days, the Ancient Mariner lay hidden in the hills. It was visible all that time, but at least two of the men were watching the sky every hour of the day. Torlos himself was, they knew, perfectly trustworthy, but they did not know whether his people were as honorable as he claimed them to be.

Suddenly, Wade saw a slowly moving speck in the sky.

"Look, Arcot! There's Torlos!"

They waited, ready for any hostile action as the tiny ship approached rapidly, circling slowly downward as it came nearer. It landed a few hundred feet away, and Torlos emerged, running rapidly toward the Earth ship. Arcot let him in through the airlock.

Torlos smiled broadly. "I had difficulty in convincing the Council that my story was true. When I told them that you could go faster than light, they strongly objected. But they had to admit that you had certainly been able to tear down the mountain very effectively, and they had received reports of the destruction of the Satorian capitol.

"It seems you first visited the city of Thanso when you came here. The people were nearly panic-stricken when they saw you rip that mountain down and uproot the magnetic ray station. No one ship had ever done that before!

"But the fact that several guards had seen me materialize out of thin air, plus the fact that they knew you could make yourselves invisible, convinced them that my story was true.

"They want to talk to you, and they say that they will gladly grant your requests. But you must promise them one thing—you must stay away from any of our people, for they are afraid of disease. Bacteria that do not bother you very much might be deadly to us. The Supreme Council of Three is willing to take the risk, but they will not allow anyone else to be exposed."

"We will keep apart from your people if the Council wishes," Arcot agreed, "but there is no real danger. We are so vastly different from you that it will be impossible for you to get our diseases, or for us to contract yours. However, if the Council wants it, we will do as they ask."

Arcot followed in the Ancient Mariner, keeping about three hundred feet to the rear.

When they reached the magnetic screen of the city, one of the beam stations cut its power for a few moments, leaving a gap for the two ships to glide smoothly through.

On the roofs of the buildings, men and women were collected, watching the shining, polished hull of the strange ship as it moved silently above them.

Torlos led them to the great central building and dropped to the huge landing field beside it. All around them, in regular rows, the great hulls of the Nansal battleships were arranged. Arcot landed the Ancient Mariner and shut off the power.

"I think Wade is the man to go with me this time," Arcot said. "He has learned to communicate with Torlos quite well. We will each carry both pistols and wear our power suits. And we'll be in radio communication with you at all times.

"I don't think they'll start anything we don't like this time, but I'm not as confident as I was, and I'm not going to take any useless chances. This time I'm going to make arrangements. If I die here, there's going to be a very costly funeral, and these men are going to pay the costs!

"I'll call you every three minutes, Morey. If I don't, check up on me. If you still don't get an answer, take this place apart because you won't be able to hurt us then.

"I'm going to tell Torlos about our precautions. If the building shields the radio, I'll be listening for you and I'll retrace my steps until I can contact you again. Right? Then come on, Wade!" Arcot, fully equipped, strode down the corridor to the airlock.

Torlos was waiting for them with another man, whom Torlos explained was a high-ranking officer of the fleet. Torlos, it seemed, was without official rank. He was a secret service agent without official status, and therefore an officer had been assigned to accompany the Earthmen.

Arcot explained to him the precautions they had taken against trouble here, and Torlos smiled. "You have certainly learned greater caution. I can't blame you. We certainly seem little different from the men of Sator; we can only stand on trial. But I know you will be safe."

They walked across the great court, which was covered with a soft, springy turf of green. The hot sun shining down on them, the brilliant colors of the buildings, the towering walls of the magnificent edifice they were approaching, and, behind them, the shining hull of the Ancient Mariner set among the dark, needle-shaped Nansalian ships, all combined to make a picture that would remain in their minds for a long time.

Here, there were no guards watching them as they were conducted to the meeting of the Supreme Council of Three.

They went into the main entrance of the towering government building and stepped into the great hall on the ground floor. It was like the interior of an ancient Gothic cathedral, beautiful and dignified. Great pillars of green stone rose in graceful, fluted columns, smoothly curving out like the branches of some stylized tree to meet in arches that rose high in pleasing curves to a point midway between four pillars. The walls were made of a dark green stone as a background; on them had been traced designs in colored tile.

The whole hall was a thing of colored beauty; the color gave it life, as the yellow sunlight gave life to the trees of the mountains.

Torlos turned to Arcot. "I wonder if it would not be wise to shut off your radio as we enter the elevator. Might not the magnetic force affect it?"

"Probably," Arcot agreed. He contacted Morey and told him that the radio would be cut off for a short while. "But it won't be more than three minutes," Arcot finished. "If it is—you know what to do."

As they entered the elevator, Torlos smiled at the two Earthmen. "We will ascend more gradually this time, so that the acceleration won't be so tiring to you." He moved the controls carefully, and by gentle steps they rose to the sixty-third floor of the giant building.

As they stepped out of the elevator, Torlos pointed toward an open window that stretched widely across one wall. Below them, they could see the Ancient Mariner.

"Your radio contact should be good," Torlos commented.

Wade put in a call to Morey, and to his relief, he made contact immediately.

The officer was leading them down a green stone corridor toward a simple door. He opened it, and they entered the room beyond.

In the center of the room was a large triangular table. At a place at the center of each side sat one man on a slightly raised chair, while on each side of him sat a number of other men.

Torlos stopped at the door and saluted. Then he spoke in rapid, liquid syllables to the men sitting at the table, halting once or twice and showing evident embarrassment as he did so.

He paused, and one of the three men in command replied rapidly in a pleasant voice that had none of the harsh command that Arcot had noticed in the voice of the Satorian Commanding One. Arcot liked the voice and the man.

Wade was talking rapidly into the radio, describing the scene before them to Morey. He described the great table of dark wood, and the men about it, some in the blue uniform of the military, and some in the loose, soft garments of the civilian. Their colored fabrics, individually in good taste and harmony, were frequently badly out of harmony with the costume of a neighbor, a difficulty accompanying this brightly tinted clothing.

Torlos turned to Arcot. "The Supreme council asks that you be seated at the table, in the places left for you." He paused, then quickly added: "I have told them of your precautions, and they have said: 'A wise man, having been received treacherously once, will not again be trapped.' They approve of your policy of caution.

"The men who sit at the raised portions of the table are the Supreme Three; the others are their advisors who know the details of Science, Business, and War. No one man can know all the branches of human endeavor, and this is but a meeting place of those who know best the individual lines. The Supreme Three are elected from the advisors in case of the death of one of the Three, and they act as co-ordinators for the rest.

"The man of Science is to your left; directly before you is the man of Business, and to your right is the Commander of the Military.

"To whom do you wish to speak first?"

Arcot considered for a moment, then: "I must first tell the Scientist what it is I have, then tell the Commander how he can use it, and finally I will tell the Businessman what will be needed."

Arcot projected his thoughts at Torlos. "We have come a vast distance across space, from another galaxy. Let your astronomer tell them what distance that represents."

Arcot paused while Torlos put the thoughts into the words of the Nansalian language. A moment later, one of the scientists, a tall, powerfully built man, even for these men of giant strength, rose and spoke to the others. When he was seated, a second rose and spoke also, with an expression of puzzled wonder.

"He says," Torlos translated, "that his science has taught him that a speed such as you say you have made is impossible, but the fact that you are here proves his science wrong.

"He reasoned that since your kind live on no planet of this system, you must come from another star. Since his science says that this is just as impossible as coming from another galaxy, he is convinced of the fallacy in the theories."

Arcot smiled. The sound reasoning was creditable; the man did not label as "impossible" something which was proven by the presence of the two Earthmen.

Arcot tried to explain the physical concepts behind his space-strain drive, but communication broke down rapidly; Torlos, a warrior, not a scientist, could not comprehend the ideas, and was completely unable to translate them into his own language.

"The Chief Physicist suggests that you think directly at him," Torlos finally told Arcot. "He suggests that the thoughts might be more familiar to him than to me." He grinned. "And they certainly aren't clear to me!"

Arcot projected his thoughts directly toward the physicist; to his surprise, the man was a perfect receiver. He had a natural gift for it. Quickly, Arcot outlined the system that had made his intergalactic voyage possible.

The physicist smiled when Arcot was finished, and tried to reply, but he was not a good transmitter. Torlos aided him.

Arcot drew the molecular pistol, and holding it up for all to see, projected the general theory of its operation toward the physicist.

To the Chief Physicist of Nansal, the idea of molecular energy was an old one; he had been making use of it all his life, and it was well known that the muscles used the heat of air to do their work. He understood well how it worked, but not until Arcot projected into his mind the mental impression of how the Earthmen had thrown one sun into another did he realize the vast power of the ray.

Awed, the man translated the idea to his fellows.

Then Arcot drew the heat pistol and explained how the annihilation of matter within it was converted into pure heat by the relux lens.

"I will show you how they work," Arcot continued. "Could we have a lump of metal of some kind?"

The Scientist spoke into an intercom microphone, and within a few minutes, a large lump of iron—a broken casting—was brought in. Arcot suspended it on the molecular beam while Wade melted it with the heat beam. It melted and collapsed into a ball that glowed brilliantly and flamed as its surface burned in the oxygen of the air. Wade cut off his heat ray, and the ball quickly cooled under the influence of the molecular beam until Arcot lowered it to the floor, a perfect sphere crusted with ice and frost.

Arcot continued for the better part of an hour to explain to the Council exactly what he had, how they could be used, and what materials and processes were needed to make them.

"First, we need lead to fuel our ship." Arcot gave them the exact specifications for the lead wire they needed.

He received his answer from the man of Business and Manufacturing. "We can give you that easily, for lead is cheap. Indeed, it seems hardly enough to repay you."

"The second thing we need," Arcot continued, "is information. We became lost in space and are unable to find our way home. I would like to explain the case to the Astronomer."

The Astronomer proved to be a man of powerful intelligence as well as powerful physique, and was a better transmitter than receiver. It took every bit of Arcot's powerful mind to project his thoughts to the man.

He explained the dilemma that he and his friends were in, and told him how he could recognize the Galaxy on his plates. The Astronomer said he thought he knew of such a nebula, but he would like to compare his own photographs with Arcot's to make sure.

"In return," Arcot told him, "we will give you another weapon—a weapon, this time, to defeat the astronomer's greatest enemy, distance. It is an electrical telescope which will permit you to see life on every planet of this system. With it, you can see a man at a distance ten times as great as the distance from Nansal to your sun!"

Eagerly, the Astronomer questioned Arcot concerning the telectroscope, but others were clamoring for Arcot's attention.

The Biologist was foremost among the contenders; he seemed worried about the possibility of the alien Earthmen carrying pathogenic bacteria.

"Torlos has told us that you have an entirely different internal organization. What is it that is different? I can't believe that he has correctly understood you."

Arcot had brought along a collection of medical books as a possible aid in case of accident. He offered to give these to Nansal in exchange for a collection of Nansalian medical texts. The English would have to be worked out with the aid of a dictionary and a primary working aid which Arcot would supply. Arcot also asked for a skeleton to take with him, and the Biologist readily agreed.

"We'd like to give you one in return," Arcot grinned, "But we only brought four along, and, unfortunately, we are using them at the moment."

The Biologist smiled back and assured him that they would not think of taking a piece of apparatus so vitally necessary to the Earthmen.

The Military Leader was the man who demanded attention next. Arcot had a long conference with him, and they decided that the best way for the Military Leader to learn the war potential of the Ancient Mariner was to personally see a demonstration of its powers.

The Council decided that the Three would go on the trip. The Military Commander picked two of his aides to go, and the Scientist picked the Astronomer and the Physicist. The head of Business and Manufacturing declined to bring any of his advisors.

"We would learn nothing," he told Arcot, "and would only be in the way. I, myself, am going only because I am one of the Three."

"Very well," said Arcot. "Let's get started."