<h2>CHAPTER VI</h2>
<h3>Worm, Submarine, and Freedom</h3>
<p>Since both Costigan and Bradley had often watched their captors at work
during the long voyage from the Solar System to Nevia, they were quite
familiar with the machine tools of the amphibians. Their stolen
lifeboat, being an emergency craft, of course carried full repair
equipment; and to such good purpose did the two officers labor that even
before their air-tanks were fully charged, all the damage had been
repaired.</p>
<p>The lifeboat lay motionless upon the mirror-smooth surface of the
ocean. Captain Bradley had opened the upper port and the three stood in
the opening, gazing in silence toward the incredibly distant horizon,
while powerful pumps were forcing the last possible ounces of air into
the practically unbreakable storage cylinders. Mile upon strangely flat
mile stretched that waveless, unbroken expanse of water, merging finally
into the violent redness of the Nevian sky. The sun was setting; a vast
ball of purple flame dropping rapidly toward the horizon. Darkness came
suddenly as that seething ball disappeared, and the air became bitterly
cold, in sharp contrast to the pleasant warmth of a moment before. And
as suddenly clouds appeared in blackly banked masses and a cold, driving
rain began to beat down in torrents.</p>
<p>"Br-r-r, it's cold! Let's go in--Oh! <i>Shut the door!</i>" Clio
shrieked, and leaped wildly down into the compartment below, out of
Costigan's way, for he and Bradley also had seen slithering toward them
the frightful arm of the Thing.</p>
<p>Almost before the girl had spoken Costigan had leaped to the levers,
and not an instant too soon; for the tip of that horrible tentacle
flashed into the rapidly narrowing crack just before the door clanged
shut. As the powerful toggles forced the heavy screw threads into
engagement and drove the massive disk home into its bottle-tight,
insulated seat, that grisly tip fell severed to the floor of the
compartment and lay there, twitching and writhing with a loathsome and
unearthly vigor. Two feet long the piece was, and larger than a strong
man's leg. It was armed with spiked and jointed metallic scales, and
instead of sucking disks it was equipped with a series
of <i>mouths</i>--mouths filled with sharp metallic teeth which gnashed
and ground together furiously, even though sundered from the horrible
organism which they were designed to feed.</p>
<p>The little submarine shuddered in every plate and member as monstrous
coils encircled her and tightened inexorably in terrific, rippling
surges eloquent of mastodonic power; and a strident vibration smote
sickeningly upon Terrestrial eardrums as the metal spikes of the
monstrosity crunched and ground upon the outer plating of their small
vessel. Costigan stood unmoved at the plate, watching intently; hands
ready upon the controls. Due to the artificial gravity of the lifeboat
it seemed perfectly stationary to its occupants. Only the weird
gyrations of the pictures upon the lookout screens showed that the craft
was being shaken and thrown about like a rat in the jaws of a terrier;
only the gauges revealed that they were almost a mile below the surface
of the ocean already, and were still going downward at an appalling
rate. Finally Clio could stand no more.</p>
<p>"Aren't you going to do something, Conway?" she cried.</p>
<p>"Not unless I have to," he replied, composedly. "I don't believe that
he can really hurt us, and if I use a ray of any kind I'm afraid that it
will kick up enough disturbance to bring Nerado down on us like a hawk
after a chicken. However, if he takes us much deeper I'll have to go to
work on him. We're getting down pretty close to our limit, and the
bottom's a long way down yet."</p>
<p>Deeper and deeper the lifeboat was dragged by its dreadful opponent,
whose spiked teeth still tore savagely at the tough outer plating of the
craft until Costigan reluctantly threw in his power switches. Against
the full propellant thrust the monster could draw them no lower, but
neither could the lifeboat make any headway toward the surface. The
Terrestrial then turned on his rays, but found that they were
ineffective. So closely was the creature wrapped around the submarine
that his weapons could not be brought to bear upon it without melting
the vessel's own outer skin.</p>
<p>"What can it possibly be, anyway, and what can we do about it?" Clio
asked.</p>
<p>"I thought at first it was something like a devilfish, or possibly an
overgrown starfish, but it's too flat, and has no body that I can see,"
Costigan made answer. "It must be a kind of flat worm. That doesn't
sound reasonable--the thing must be all of a hundred meters long--but
there it is. The only thing left to do now, as I see it, is to try to
boil him alive."</p>
<p>He closed other circuits, diffusing a terrific beam of pure heat, and
the water all about them burst into furious clouds of steam. The boat
leaped upward as the metallic fins of the gigantic worm fanned vapor
instead of water, but the creature neither released its hold nor ceased
its relentlessly grinding attack. Minute after minute went by, but
finally the worm dropped limply away--cooked through and through;
vanquished only by death.</p>
<p>"Now we've put our foot in it, clear to the knee!" Costigan
exclaimed, as he shot the lifeboat upward at its maximum power. "Look at
that! I knew that Nerado could trace us, but I didn't have any idea
that <i>they</i> could. It's a good thing these ultra-vision plates
don't need light to see by or we'd be <i>'spurlos versenkt'</i> in a
hurry!"</p>
<p>Staring with Costigan into the plate, Bradley and the girl saw, not
the Nevian sky-rover they had expected, but a fast submarine cruiser,
manned by the frightful fishes of the greater deeps. It was coming
directly toward the lifeboat, and even as Costigan hurled the little
vessel off at an angle and then upward into the air one of the deadly
offensive rods, tipped with its glowing ball of pure destruction,
flashed through the spot where they would have been had they held their
former course.</p>
<p>But powerful as were the propellant forces and fiercely though
Costigan applied them, the denizens of the deep clamped a tractor ray
upon the flying vessel before it had gained a mile of altitude. Costigan
aligned his every driving projector as his vessel came to an abrupt halt
in the invisible grip of the beam, then experimented with various
dials.</p>
<p>"There ought to be some way of cutting that beam," he pondered
audibly, "but I don't know enough about their system to do it, and I'm
afraid to monkey around with things too much, because I might
accidentally release the screens we've already got out, and they're
stopping altogether too much stuff for us to do without them right
now."</p>
<p>He frowned as he studied the flaring defensive screens, now radiating
an incandescent violet under the concentration of the forces being
hurled against them by the warlike fishes, then stiffened suddenly.</p>
<p>"I thought so--they <i>can</i> shoot 'em!" he exclaimed, throwing the
lifeboat into a furious corkscrew turn, and the very air blazed into
flaming splendor as a dazzlingly scintillating ball of energy sped past
them and high into the air beyond.</p>
<p>Then for minutes a spectacular battle raged. The twisting, turning,
leaping airship, small as she was agile, kept on eluding the explosive
projectiles of the fishes, and her screens neutralized and re-radiated
the full power of the attacking beams. More--since Costigan did not need
to think of sparing his iron, the ocean around the great submarine began
furiously to boil under the full-driven offensive beams of the tiny
Nevian ship. But escape Costigan could not. He could not cut that
tractor beam and the utmost power of his drivers could not wrest the
lifeboat from its tenacious clutch. And slowly but inexorably the ship
of space was being drawn downward toward the ship of ocean's depths.
Downward, in spite of the utmost possible effort of every projector and
penetrator, and the two Terrestrial spectators, sick at heart, looked
once at each other. Then they looked at Costigan, who, jaw hard set and
eyes unflinchingly upon his plate, was concentrating his attack upon one
turret of the green monster as they settled lower and lower.</p>
<p>"If this is ... if our number is going up, Conway," Clio began,
unsteadily.</p>
<p>"Not yet, it isn't!" he snapped. "Keep a stiff upper lip, girl. We're
still breathing air, and the battle's not over yet!"</p>
<p>Nor was it; but it was not Costigan's efforts, mighty though they
were, that ended the attack of the fishes of the greater deeps. The
tractor beam snapped without warning, and so prodigious were the forces
being exerted by the lifeboat that, as it hurled itself away, the three
passengers were thrown violently to the floor, in spite of the powerful
gravity controls. Scrambling up on hands and knees, bracing himself as
best he could against the terrific forces, Costigan managed finally to
force a hand up to his panel. He was barely in time; for even as he cut
the driving power to its normal value the outer shell of the lifeboat
was blazing at white heat from the friction of the atmosphere through
which it had been tearing with such an insane acceleration!</p>
<p>"Oh, I see--Nerado to the rescue," Costigan commented, after a glance
into the plate. "I hope that those fish blow him clear out of the
Galaxy!"</p>
<p>"Why?" demanded Clio. "I should think that you'd...."</p>
<p>"Think again," he advised her. "The worse Nerado gets licked the
better for us. I don't really expect that, but if they can keep him busy
long enough, we can get far enough away so that he won't bother about us
any more."</p>
<p>As the lifeboat tore upward through the air at the highest
permissible atmospheric velocity Bradley and Clio peered over Costigan's
shoulders into the plate, watching in absorbed interest the scene which
was being kept in focus upon it. The Nevian ship of space was plunging
downward in a long, slanting dive, her terrific beams of force screaming
out ahead of her. The rays of the little lifeboat had boiled the waters
of the ocean; those of the parent craft seemed literally to blast them
out of existence. All about the green submarine there had been volumes
of furiously-boiling water and dense clouds of vapor; now water and fog
alike disappeared, converted into transparent superheated steam by the
blasts of Nevian energy. Through that tenuous gas the enormous mass of
the submarine fell like a plummet, her defensive screens flaming an
almost invisible violet, her every offensive weapon vomiting forth solid
and vibratory destruction toward the Nevian cruiser so high in the
angry, scarlet heavens.</p>
<p>For miles the submarine dropped, until the frightful pressure of the
depth drove water into Nerado's beam faster than his forces could
volatilize it. Then in that seething funnel there was waged desperate
conflict. At that funnel's wildly turbulent bottom lay the submarine,
now apparently trying to escape, but held fast by the tractor rays of
the space-ship; at its top, smothered almost to the point of
invisibility by billowing masses of steam, hung poised the Nevian
cruiser.</p>
<p>As the atmosphere had grown thinner and thinner with increasing
altitude Costigan had regulated his velocity accordingly, keeping the
outer shell of the vessel at the highest temperature consistent with
safety. Now beyond measurable atmospheric pressure, the shell cooled
rapidly and he applied full touring acceleration. At an appalling and
constantly increasing speed the miniature space-ship shot away from the
strange, red planet; and smaller and smaller upon the plate became its
picture. Long since the great vessel of the void had plunged beneath the
surface of the sea, more closely to come to grips with the vessel of the
fishes; for a long time nothing of the battle had been visible save
immense clouds of steam, blanketing hundreds of square miles of the
ocean's surface. But just before the picture became too small to reveal
details a few tiny dark spots appeared above the banks of cloud, now
brilliantly illuminated by the rays of the rising sun--dots which might
have been fragments of either vessel, blown bodily from the depths of
the ocean and, riven asunder, hurled high into the air by the incredible
forces at the command of the other.</p>
<p>Nevia a tiny moon and the fierce blue sun rapidly growing smaller in
the distance, Costigan swung his visiray beam into the line of travel
and turned to his companions.</p>
<p>"Well, we're off," he said, scowling. "I hope it was Nerado that got
blown up back there, but I'm afraid it wasn't. He whipped two of those
submarines that we know of, and probably half their fleet besides.
There's no particular reason why that one should be able to take him, so
it's my idea that we should get ready for great gobs of trouble.</p>
<p>"They'll chase us, of course; and I'm afraid that with their immense
power, they'll catch us."</p>
<p>"But what can we do, Conway?" asked Clio.</p>
<p>"Several things," he grinned. "I managed to get quite a lot of dope
on that paralyzing ray and some of their other stuff, and we can install
the necessary equipment in our suits easily enough."</p>
<p>They removed their armor, and Costigan explained in detail the
changes which must be made in the Triplanetary field generators. All
three set vigorously to work--the two officers deftly and surely; Clio
uncertainly and with many questions, but with undaunted spirit. Finally,
having done all they could do to strengthen their position, they settled
down to the watchful routine of the flight, with every possible
instrument set to detect any sign of the pursuit they so feared.</p>
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