<h2>CHAPTER 15</h2>
<p>Crag sighted the Red Dog party immediately—three figures plodding in
single file toward Drone Baker. He saw with satisfaction that they had
discarded the rocket launcher. He took that as a sign they believed the
Aztec crew dead. He found a halfway comfortable sitting position, and
settled back to await developments.</p>
<p>The distant figures moved across the plain with maddening slowness. From
time to time he returned his eyes to the enemy rocket. It showed no
signs of life. Once he debated taking the gamble of trying to reach it,
but as quickly discarded the idea. Caught on the open plain and he'd be
a gone gosling.</p>
<p>He waited.</p>
<p>After what seemed a long while, the invaders reached a point overlooking
Drone Baker. One of the figures remained on a small rise overlooking the
drone while the other two separated and approached it from different
directions. The tactic disquieted him. It indicated that the newcomers
were not entirely convinced that they were alone in Crater Arzachel.</p>
<p>After another interminably long time, the two figures approaching the
rocket met at its base. They walked around the rocket several times,
then struck out, this time toward Drone Charlie. Their companion left
his lookout point and cut across the plain to join them.</p>
<p>Crag squirmed uncomfortably. He was tired and hungry; his muscles ached
from the constriction of the suit. His body was hot and clammy, and
perspiration from his brow stung his eyes. He sighed, wishing he had a
cigarette. Strange, he hadn't smoked in over a year but all at once the
need for tobacco seemed overwhelming. He pushed the thought aside.</p>
<p>The invaders were strung out in single file, moving in a direction which
brought them closer to his position. He shifted to a point below the
crest, moving slowly to avoid detection. Their path crossed his field of
vision at a distance of about half a mile. At the closest point he saw
they carried rifles in shoulder slings. He took this as another
indication they suspected the presence of survivors. The invaders
stopped and rested at a point almost opposite him. He fidgeted, trying
to get his body into a more comfortable position.</p>
<p>Finally they resumed their trek. Before they reached the drone they
halted. One man remained in the cover of a spur of rock while the other
two separated and advanced on the drone from different directions. Crag
cursed under his breath. They certainly weren't going to be sitting
ducks. Perhaps it was just a precaution. Simply good infantry tactics,
he told himself, but it still raised a complication.</p>
<p>He waited. The two invaders closed on the drone, meeting at its base.
They evidently decided it was abandoned, for they left within a few
minutes walking to join their waiting companion. After a short huddle
they struck out in the direction of Bandit. This was the move he had
waited for.</p>
<p>He withdrew to the lee side of the ridge and picked his way toward
Bandit as rapidly as possible, taking care not to brush against the
sharp slivers of rock. He drew near the rocket, thinking that the open
hatch would be a dead giveaway. Still, there was no alternative. A fort
without a gunport was no fort at all. He climbed to a spot close to the
crest of the ridge and peered back in the direction of the invaders,
startled to find they were nearer than he had supposed. He hastily
withdrew his head, deciding it was too late to warn the others to
abandon the rocket. If the invaders climbed straight up the opposite
side of the ridge, they conceivably could catch his crew on the open
plain. That made another complication.</p>
<p>He scanned the ridge. Off to his right a series of granite spurs jutted
from the base rock in finger formation. He picked his way toward them,
then descended until he found shelter between two rock outcroppings
which gave him a clear view of Bandit. He checked his automatic rifle,
moving the control lever to the semi-automatic position. The black
rectangle that marked Bandit's hatch seemed lifeless.</p>
<p>He waited.</p>
<p>Long minutes passed. He cursed the eternal silence of the moon which
robbed him of the use of his ears. A cannon could fire within an inch of
his back and he'd never know it, he thought. He moved his head slightly
forward from time to time in an effort to see the slope behind him.
Nothing happened. His body itched intolerably from perspiration. He
readjusted the suit temperature setting, gaining a slight respite from
the heat. All at once he caught movement out of the corner of his face
plate and involuntarily jerked his head back. He waited a moment, aware
that his heart was pounding heavily, then cautiously moved forward. One
of the invaders was picking his way down the slope in a path that would
take him within thirty yards of his position. The man moved slowly,
half-crouched, keeping his rifle cradled across his arm.</p>
<p>They know, he thought. The open hatch was the giveaway. He anxiously
searched Bandit. No sign of life was visible. He gave silent thanks that
the invaders had not lugged their rocket launcher with them. Prochaska,
he knew, would be watching, crouched in the shadow of the hatch opening
behind the heavy automatic rifle. He estimated the distance between the
base of the slope and the rocket at 400 yards—close enough for
Prochaska to pick off anyone who ventured onto the plain.</p>
<p>He waited while the invader passed abreast of him and descended to the
base of the plain, taking cover in the rocks. He halted there and looked
back. A few moments later Crag saw the second of the invaders moving
down the slope about a hundred yards beyond his companion. He, too,
stopped near the base of the rocks. Where was the third man? The same
technique they used before, Crag decided. He would be covering his
companions' advance from the ridge. That made it more difficult.</p>
<p>He studied the two men at the edge of the plain. It looked like a
stalemate. They either had to advance or retreat. Their time was
governed by oxygen. If they advanced, they'd be dead pigeons. Prochaska
couldn't miss if they chose to cross the clearing. As it was, neither
side could get a clear shot at the distance separating them, although
the invaders could pour a stream of shells into the open hatch. But
Prochaska would be aware of that danger and would have taken refuge to
one side of the opening, he decided. There was another complication.
The shells were heavy enough to perforate the rocket. Well, he'd worry
about that later. He moved his head for a better view of the invaders.</p>
<p>The man nearest him had gotten into a prone position and was doing
something with the end of his rifle. Crag watched, puzzled. Suddenly the
man brought the rifle to his shoulder, and he saw that the end of the
muzzle was bulged. Rifle grenade! Damn, they'd brought a regular
arsenal. If he managed to place one in the open hatch, the Bandit crew
was doomed. Heedless of the other two Red Dog crewmen, he stepped out
between the shoulders of rock to gain freedom of movement and snapped
his own weapon to his shoulder. He had trouble fitting his finger into
the trigger guard. The enemy was spraddled on his stomach, legs apart,
adjusting his body to steady his weapon.</p>
<p>Crag moved his weapon up, bringing the prone man squarely into his
sights. He squeezed the trigger, feeling the weapon jump against his
padded shoulder, and leaped back into the protective cover of rock.
Something struck his face plate. Splinter of rock, he thought. The
watcher on the ridge hadn't been asleep. He dropped to his knees and
crawled between the rock spurs to gain a new position. The sharp needle
fragments under his hands and knees troubled him. One small rip and he'd
be the late Adam Crag. He finally reached a place where he could see the
lower end of the ridge.</p>
<p>The man he'd shot was a motionless blob on the rocky floor, his arms and
legs pulled up in a grotesque fetal position. The vulnerability of human
life on the moon struck Crag forcibly. A bullet hole anywhere meant
sudden violent death. A hit on the finger was as fatal as a shot through
the heart. Once air pressure in a suit was lost a man was dead—horribly
dying within seconds. A pinhole in the suit was enough to do it. His
eyes searched for the dead man's companions. The ridge and plain seemed
utterly lifeless. Bandit was a black canted monolith rising above the
plain, seeming to symbolize the utter desolation and silence of Crater
Arzachel. For a moment he was fascinated. The very scene portended
death. It was an eery feeling. He shook it off and waited. He was
finally rewarded by movement. A portion of rock near the edge of the
plain seemed to rise—took shape. The dead man's companion had risen to
a kneeling position, holding his rifle to his shoulder.</p>
<p>Crag raised his gun, wondering if he could hold the man in his sights. A
hundred and fifty yards to a rifleman clothed in a cumbersome space suit
seemed a long way. Before he could pull the trigger, the man flung his
arms outward, clawing at his throat for an instant before slumping to
the rocks. It took Crag a second to comprehend what had happened.
Prochaska had been ready.</p>
<p>A figure suddenly filled the dark rectangle of Bandit, pointing toward
the ridge behind Crag. He apparently was trying to tell him something.
Crag scanned the ridge. It seemed deserted. He turned toward Bandit and
motioned toward his faceplate. The other understood. His interphones
crackled to life. Prochaska's voice was welcome.</p>
<p>"I see him," he broke in. "He's moving up the slope to your right,
trying to reach the top of the ridge. Too far for a shot," he added.</p>
<p>Crag scrambled into a clearing and scanned the ridge, just in time to
see a figure disappear over the skyline. He started up the slope in a
beeline for the crest. If he could reach it in time, he might prevent
the sniper from crossing the open plain which lay between the ridge and
Red Dog. Cops and robbers, he thought. Another childhood game had
suddenly been recreated, this time on the bleak plain of an airless
alien crater 240,000 miles from the sunny Southern California lands of
his youth.</p>
<p>Crag reached the ridge. The plain on the other side seemed devoid of
life. In the distance the squat needle that was Red Dog jutted above
the ashy plain, an incongruous human artifact lost on the wastelands of
the moon. Only its symmetry distinguished it from the jagged monolithic
structures that dotted this end of the crater floor. He searched the
slope. Movement far down the knoll to his right caught his eye. The
fugitive was trying to reach a point beyond range of Crag's weapon
before cutting across the plain. He studied the terrain. Far ahead and
to the left of the invader the crater floor became broken by bizarre
rock formations of Backbone Ridge—a great half-circle which arced back
toward Red Dog. He guessed that the fantastic land ahead was the
fugitive's goal.</p>
<p>He cut recklessly down the opposite slope and gained the floor of the
crater before turning in the direction he had last seen the invader. He
cursed himself for having lost sight of him. Momentarily, he slowed his
pace, thinking he was ripe for a bushwhacking job. His eyes roved the
terrain. No movement, no sign of his quarry. He moved quickly, but
warily, attempting to search every inch of the twisted rock formations
covering the slope ahead. His eye detected movement off to one side. At
the same instant a warning sounded in his brain and he flung himself
downward and to the side, hitting the rough ground with a sickening
thud. He sensed that the action had saved his life. He crawled between
some rock outcroppings, hugging the ground until he reached a vantage
point overlooking the area ahead. He waited, trying to search the slope
without exposing his position. Minutes passed.</p>
<p>He tossed his head restlessly. His eyes roved the plain, searching,
attempting to discern movement. No movement—only a world of still
life-forms. The plain—its rocks and rills—stretched before him, barren
and endless. Strange, he thought, there should be vultures in the sky.
And on the plain creosote bushes, purple sage, cactus ... coyotes and
rattlesnakes.</p>
<p>But ... no! This was an other-world desert, one spawned in the fires of
hell—a never-never land of scalding heat and unbelievable cold. He
thought it was like a painting by some mad artist. First he had sketched
in the plain with infinite care—a white-black, monotonous, unbroken
expanse. Afterward he had splashed in the rocks, painting with wild
abandon, heedless of design, form or structure, until the plain was a
hodgepodge of bizarre formations. They towered, squatted, pierced the
sky, crawled along the plain like giant serpents—an orgy in rock
without rhyme or reason. Somewhere in the lithic jungle his quarry
waited. He would flush him out.</p>
<p>He thought that the sniper must be getting low on oxygen. He couldn't
afford to waste time. He had to reach Red Dog soon—if he were to live.
Crag checked his oxygen meter and began moving forward, conscious that
the chase would be governed by his oxygen supply. He'd have to remember
that.</p>
<p>He reached a clearing on the slope just as the sniper disappeared into
the rock shadows on the opposite side. He hesitated. Would the pursued
man be waiting ... covering the trail behind him? He decided not to
chance crossing it and began skirting around its edge, fretting at the
minutes wasted. His earphones crackled and Prochaska's voice came, a
warning through the vacuum:</p>
<p>"Nagel says your oxygen must be low."</p>
<p>He glanced at the indicator on his cylinder. Still safe. He studied the
rocks ahead and told Prochaska:</p>
<p>"I've got to keep this baby from reaching Red Dog."</p>
<p>"Watch yourself. Don't go beyond the point of no return." Prochaska's
voice held concern.</p>
<p>"Stop worrying."</p>
<p>Crag pushed around the edge of the clearing with reckless haste. It was
hard going and he was panting heavily long before he reached the spot
where he had last seen the sniper. He paused to catch his breath. The
slope fell away beneath him, a miniature kingdom of jagged needle-sharp
rock. There was no sign of the fugitive. The plain, too, was devoid of
life. He descended to the edge of the clearing and picked his way
through the debris of some eon-old geologic catastrophe. Ahead and to
the left of the ridge, the plain was broken by shallow rills and weird
rock outcroppings. Farther out Backbone Ridge began as low mounds of
stone, becoming twisted black stalagmites hunched incongruously against
the floor of the crater, ending as jagged sharp needles of rock curving
over the plain in a huge arc.</p>
<p>A moment later he caught sight of his quarry. The invader had cut down
to the edge of the plain, abandoning the protection of the ridge, making
a beeline for the nearest rock extrusion on the floor of the crater. Too
far away for a shot. Crag cursed and made a quick judgment, deciding to
risk the open terrain in hopes of gaining shelter before the sniper was
aware of his strategy.</p>
<p>He abandoned the protection of the slope and struck out in a straight
line toward the distant mounds on the floor of the crater, keeping his
eyes on the fugitive. They raced across the clearing in parallel paths,
several hundred yards apart. The sniper had almost reached the first
rocks when he glanced back. He saw Crag and put on an extra burst of
speed, reaching the first rocks while Crag was still a hundred yards
from the nearest mound. Crag dropped to the ground, thankful that it was
slightly uneven. At best he'd make a poor target. He crawled, keeping
his body low, tossing his head in an effort to shake the perspiration
from his eyes.</p>
<p>"How you doing, skipper?" It was Prochaska. Lousy, Crag thought. He
briefed him without slowing his pace.</p>
<p>The ashy plain just in front of him spurted in little fountains of white
dust. He dropped flat on his belly with a gasp.</p>
<p>"You all right?"</p>
<p>"Okay," Crag gritted. "This boy's just using me for target practice."
Prochaska's voice became alarmed. He urged him to retreat.</p>
<p>"We can get them some other way," he said.</p>
<p>"Not if they once get that launcher in operation. I'm moving on." There
was a moment of silence.</p>
<p>"Okay, skipper, but watch yourself." His voice was reluctant. "And watch
your oxygen."</p>
<p>"Roger." He checked his gauge and hurriedly switched to the second
cylinder. Now he was on the last one. The trick would be to stretch his
oxygen out until the chase was ended—until the man ahead was a corpse.</p>
<p>He clung to the floor of the crater, searching for shelter. The ground
rose slightly to his right. He crawled toward the rise, noting that the
terrain crested high enough to cut his view of the base of the rocks.
Satisfied that he was no longer visible, he began inching his way toward
the nearest mounds.</p>
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