<h2><SPAN name="XVII" id="XVII" />XVII</h2>
<p>"Morey, pull down the wall over that door to block their
passage," Arcot ordered. "I'll get the other wall."</p>
<p>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 <i>the Ancient Mariner</i>.</p>
<p>"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."</p>
<p>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.</p>
<p>"<SPAN name="Page_140" id="Page_140" />In the air, quick!" Arcot yelled. He turned on his power
suit and rose into the air, signalling Torlos to grab his ankles
as he had done before. Morey slammed another parting shot
toward the doorway as he lifted himself toward the ceiling.
Then both Earthmen snapped on their invisibility units.
Torlos, because of his direct contact with Arcot, also vanished
from sight.</p>
<p>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.</p>
<p>Just then, the shining bulk of the <i>Ancient Mariner</i> 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.</p>
<p>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.</p>
<p>"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."</p>
<p>Arcot strapped himself into the control chair.</p>
<p>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.</p>
<p>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.</p>
<p>But already there were forty of the great battleships rising
to meet them.</p>
<p>"<SPAN name="Page_141" id="Page_141" />I think we'd better get moving," Arcot said. "We can't
let a magnetic ray touch us now; it would kill Torlos. I'm
going to cut in the invisibility units, so don't use the heat
beams whatever you do!"</p>
<p>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.</p>
<p>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.</p>
<p>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 <i>Ancient Mariner</i> was visible again. Arcot had
no time to replace the tube; the Satorian fleet kept him too
busy.</p>
<p>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
<i>Ancient Mariner</i> was giving a good account of itself.</p>
<p>And always, Arcot was working the ship toward the magnetic
wall and the base of the city.</p>
<p>Suddenly, giant pneumatic guns from below joined in
the battle, hurling huge explosive shells toward the Earth-ship.
They managed to hit the <i>Ancient Mariner</i> 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.</p>
<p>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.</p>
<p>Three ships attempted to commit suicide in their efforts
<SPAN name="Page_142" id="Page_142" />to destroy the Earthmen. They were only semi-successful;
they managed to commit suicide. In trying to crash into the
ship, they were simply caught by Morey's or Wade's molecular
beam and thrown away. Morey actually developed a
use for them. He caught them in the beam and used them
as bullets to smash the other ships, throwing them about on
the molecular ray until they were too cold to move.</p>
<p>Arcot finally managed to reach the magnetic wall.</p>
<p>"Wade!" he called. "Get that projector building!"</p>
<p>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 <i>Ancient Mariner</i> shot
through the gap. In a few moments, they would be far away
from the city.</p>
<p>Torlos seemed to realize this. Moving quickly, he pushed
Morey away from the molecular beam projector, taking the
controls away from him.</p>
<p>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.</p>
<p>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.</p>
<p>Torlos stared at it in amazement and horror.</p>
<p>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.</p>
<p>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.</p>
<p>Then Arcot lifted the ship and headed up through the
<SPAN name="Page_143" id="Page_143" />cloud layer and into the bright light of the great yellow
sun, above the sea of gray misty clouds.</p>
<p>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?"</p>
<p>"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."</p>
<p>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.</p>
<p>"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?"</p>
<p>"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."</p>
<p>Arcot indicated to Torlos that he was to go with him.
Wade and Fuller followed.</p>
<p>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?"</p>
<p>"I am sorry, man of Earth," replied Torlos. "I can only
say that I did not fully understand the effect the rays would
have. I did not know how long we would remain invisible;
the thing has been accomplished in our laboratories, but
<SPAN name="Page_144" id="Page_144" />only for fractions of a second, and I feared we might become
visible soon. That was one of their latest battleships,
equipped with a new, secret, and very deadly weapon. I
do not know exactly what the weapon is, but I knew that
ship could be deadly against us, and I wanted to make sure
we were not attacked by it. That is why I used the beam
while your ship was invisible.</p>
<p>"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."</p>
<p>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!</p>
<p>"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.</p>
<p>"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.</p>
<p>"Torlos, respect the powers of this ship, and do not release
its energies unknowingly; they are too great."</p>
<p>Torlos looked around him in awe. He had seen the engines—small,
apparently futile things, compared with the
<SPAN name="Page_145" id="Page_145" />solid might of the giant engines in his ship—but he had
seen explosive charges that he knew would split any ship
open from end to end bounce harmlessly from the smooth
walls of this ship. He had seen it destroy the fleet of magnetic
ships that had formed a supposedly impregnable guard
around the mightiest city of Sator.</p>
<p>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.</p>
<p>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.</p>
<p>The <i>Ancient Mariner</i> 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.</p>
<p>"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."</p>
<p>"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!"</p>
<p>"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.</p>
<p>"And after the fight, he wasn't even breathing heavily!"</p>
<p>"No," agreed Morey. "But did you notice him <i>during</i>
the fight? He was breathing heavily, deeply, and swiftly—not
the shallow, panting breath of a runner, but deep and
<SPAN name="Page_146" id="Page_146" />full, yet faster than I can breathe. I could hear him breathing
in spite of all the noise of the battle."</p>
<p>"I noticed it," Arcot said. "He started breathing <i>before</i>
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.</p>
<p>"But not Torlos! No fatigue for him! Why? <i>Because he
doesn't use the oxygen of the air to do work, and therefore
his body is not a chemical engine!</i>"</p>
<p>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!"</p>
<p>"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."</p>
<p>"Oh, <i>brother</i>," 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."</p>
<p>As the two men found out later, Morey was wrong on
that last point. The men of Torlos' race had a small organ, a
mass of cells in the lower abdomen which could absorb food
from the bloodstream and oxidize it, yielding heat, whenever
the temperature of the blood dropped below a certain
point. Then they could live very comfortably in the Arctic
zones; they carried their own heaters. Their vast strength
<SPAN name="Page_147" id="Page_147" />was limited then, however, and they were forced to eat
more and were more subject to fatigue.</p>
<p>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'!"</p>
<p>"I'll be right down," Arcot told him, heading for the
library.</p>
<p>As he entered, Torlos smiled at him; Arcot picked up his
thought easily: "Your friends do not seem to understand
my thoughts."</p>
<p>"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."</p>
<p>He continued, explaining carefully to Torlos the differences
between their bodies and their methods of using energy.</p>
<p>"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!"</p>
<p>"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?"</p>
<p>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.</p>
<p>"Hundreds of years ago, on Nansal ..."</p>
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