Postmark
Ganymede
by Robert Silverberg
"I'm washed up," Preston
growled bitterly. "They made a postman out of me. Me – a
postman!"
He crumpled the assignment memo into
a small, hard ball and hurled it at the bristly image of himself in
the bar mirror. He hadn't shaved in three days – which was how long
it had been since he had been notified of his removal from Space
Patrol Service and his transfer to Postal Delivery.
Suddenly, Preston felt a hand on his
shoulder. He looked up and saw a man in the trim gray of a
Patrolman's uniform.
"What do you want, Dawes?"
"Chief's been looking for you,
Preston. It's time for you to get going on your run."
Preston scowled. "Time to go
deliver the mail, eh?" He spat. "Don't they have anything
better to do with good spacemen than make letter carriers out of
them?"
The other man shook his head. "You
won't get anywhere grousing about it, Preston. Your papers don't
specify which branch you're assigned to, and if they want to make you
carry the mail – that's it." His voice became suddenly gentle.
"Come on, Pres. One last drink, and then let's go. You don't
want to spoil a good record, do you?"
"No," Preston said
reflectively. He gulped his drink and stood up. "Okay. I'm
ready. Neither snow nor rain shall stay me from my appointed rounds,
or however the damned thing goes."
"That's a smart attitude,
Preston. Come on – I'll walk you over to Administration."
Savagely, Preston ripped away the
hand that the other had put around his shoulders. "I can get
there myself. At least give me credit for that!"
"Okay," Dawes said,
shrugging. "Well – good luck, Preston."
"Yeah. Thanks. Thanks real
lots."
He pushed his way past the man in
Space Grays and shouldered past a couple of barflies as he left. He
pushed open the door of the bar and stood outside for a moment.
It was near midnight, and the sky
over Nome Spaceport was bright with stars. Preston's trained eye
picked out Mars, Jupiter, Uranus. There they were – waiting. But he
would spend the rest of his days ferrying letters on the Ganymede
run.
He sucked in the cold night air of
summertime Alaska and squared his shoulders.
* * * * *
Two hours later, Preston sat at the
controls of a one-man patrol ship just as he had in the old days.
Only the control panel was bare where the firing studs for the heavy
guns was found in regular patrol ships. And in the cargo hold instead
of crates of spare ammo there were three bulging sacks of mail
destined for the colony on Ganymede.
Slight difference,
Preston thought, as he set up his blasting pattern.
"Okay, Preston," came the
voice from the tower. "You've got clearance."
"Cheers," Preston said, and
yanked the blast-lever. The ship jolted upward, and for a second he
felt a little of the old thrill – until he remembered.
He took the ship out in space, saw
the blackness in the viewplate. The radio crackled.
"Come in, Postal Ship. Come in,
Postal Ship."
"I'm in. What do you want?"
"We're your convoy," a hard
voice said. "Patrol Ship 08756, Lieutenant Mellors, above you.
Down at three o'clock, Patrol Ship 10732, Lieutenant Gunderson. We'll
take you through the Pirate Belt."
Preston felt his face go hot with
shame. Mellors! Gunderson! They would stick two of his old sidekicks
on the job of guarding him.
"Please acknowledge,"
Mellors said.
Preston paused. Then: "Postal
Ship 1872, Lieutenant Preston aboard. I acknowledge message."
There was a stunned silence.
"Preston?
Hal Preston?"
"The one and only," Preston
said.
"What are you doing on a Postal
ship?" Mellors asked.
"Why don't you ask the Chief
that? He's the one who yanked me out of the Patrol and put me here."
"Can you beat that?"
Gunderson asked incredulously. "Hal Preston, on a Postal ship."
"Yeah. Incredible, isn't it?"
Preston asked bitterly. "You can't believe your ears. Well, you
better believe it, because here I am."
"Must be some clerical error,"
Gunderson said.
"Let's change the subject,"
Preston snapped.
They were silent for a few moments,
as the three ships – two armed, one loaded with mail for Ganymede –
streaked outward away from Earth. Manipulating his controls with the
ease of long experience, Preston guided the ship smoothly toward the
gleaming bulk of far-off Jupiter. Even at this distance, he could see
five or six bright pips surrounding the huge planet. There was
Callisto, and – ah
– there was Ganymede.
He made computations, checked his
controls, figured orbits. Anything to keep from having to talk to his
two ex-Patrolmates or from having to think about the humiliating job
he was on. Anything to –
"Pirates!
Moving up at two o'clock!"
Preston came awake. He picked off the
location of the pirate
ships – there were two of them,
coming up out of the asteroid belt. Small, deadly, compact, they
orbited toward him.
He pounded the instrument panel in
impotent rage, looking for the guns that weren't there.
"Don't worry, Pres," came
Mellors' voice. "We'll take care of them for you."
"Thanks," Preston said
bitterly. He watched as the pirate ships approached, longing to trade
places with the men in the Patrol ships above and below him.
Suddenly a bright spear of flame
lashed out across space and the hull of Gunderson's ship glowed
cherry red. "I'm okay," Gunderson reported immediately.
"Screens took the charge."
Preston gripped his controls and
threw the ship into a plunging dive that dropped it back behind the
protection of both Patrol ships. He saw Gunderson and Mellors
converge on one of the pirates. Two blue beams licked out, and the
pirate ship exploded.
But then the second pirate swooped
down in an unexpected dive. "Look out!" Preston yelled
helplessly – but it was too late. Beams ripped into the hull of
Mellors' ship, and a dark fissure line opened down the side of the
ship. Preston smashed his hand against the control panel. Better to
die in an honest dogfight than to live this way!
It was one against one, now –
Gunderson against the pirate. Preston dropped back again to take
advantage of the Patrol ship's protection.
"I'm going to try a diversionary
tactic," Gunderson said on untappable tight-beam. "Get
ready to cut under and streak for Ganymede with all you got."
"Check."
Preston watched as the tactic got
under way. Gunderson's ship traveled in a long, looping spiral that
drew the pirate into the upper quadrant of space. His path free,
Preston guided his ship under the other two and toward unobstructed
freedom. As he looked back, he saw Gunderson steaming for the pirate
on a sure collision orbit.
He turned away. The score was two
Patrolmen dead, two ships wrecked – but the mails would get
through.
Shaking his head, Preston leaned
forward over his control board and headed on toward Ganymede.
* * * * *
The blue-white, frozen moon hung
beneath him. Preston snapped on the radio.
"Ganymede Colony? Come in,
please. This is your Postal Ship." The words tasted sour in his
mouth.
There was silence for a second. "Come
in, Ganymede," Preston repeated impatiently – and then the
sound of a distress signal cut across his audio pickup.
It was coming on wide beam from the
satellite below – and they had cut out all receiving facilities in
an attempt to step up their transmitter. Preston reached for the
wide-beam stud, pressed it.
"Okay, I pick up your signal,
Ganymede. Come in, now!"
"This is Ganymede," a tense
voice said. "We've got trouble down here. Who are you?"
"Mail ship," Preston said.
"From Earth. What's going on?"
There was the sound of voices
whispering somewhere near the microphone. Finally: "Hello, Mail
Ship?"
"Yeah?"
"You're going to have to turn
back to Earth, fellow. You can't land here. It's rough on us, missing
a mail trip, but –"
Preston said impatiently, "Why
can't I land? What the devil's going on down there?"
"We've been invaded," the
tired voice said. "The colony's been
completely surrounded by iceworms."
"Iceworms?"
"The local native life,"
the colonist explained. "They're about thirty feet long, a foot
wide, and mostly mouth. There's a ring of them about a hundred yards
wide surrounding the Dome. They can't get in and we can't get out –
and we can't figure out any possible approach for you."
"Pretty," Preston said.
"But why didn't the things bother you while you were building
your Dome?"
"Apparently they have a very
long hibernation-cycle. We've only been here two years, you know. The
iceworms must all have been asleep when we came. But they came
swarming out of the ice by the hundreds last month."
"How come Earth doesn't know?"
"The antenna for our long-range
transmitter was outside the Dome. One of the worms came by and chewed
the antenna right off. All we've got left is this short-range thing
we're using and it's no good more than ten thousand miles from here.
You're the first one who's been this close since it happened."
"I get it." Preston closed
his eyes for a second, trying to think things out.
The Colony was under blockade by
hostile alien life, thereby making it impossible for him to deliver
the mail. Okay. If he'd been a regular member of the Postal Service,
he'd have given it up as a bad job and gone back to Earth to report
the difficulty.
But I'm not going back. I'll be
the best damned mailman they've got.
"Give me a landing orbit anyway,
Ganymede."
"But you can't come down! How
will you leave your ship?"
"Don't worry about that,"
Preston said calmly.
"We have to worry! We don't dare
open the Dome, with those creatures outside. You can't
come down, Postal Ship."
"You want your mail or don't
you?"
The colonist paused. "Well –"
"Okay, then," Preston said.
"Shut up and give me landing coordinates!"
There was a pause, and then the
figures started coming over. Preston jotted them down on a
scratch-pad.
"Okay, I've got them. Now sit
tight and wait." He glanced contemptuously at the three
mail-pouches behind him, grinned, and started setting up the orbit.
Mailman, am I? I'll show them!
He brought the Postal Ship down with
all the skill of his years in the Patrol, spiralling in around the
big satellite of Jupiter as cautiously and as precisely as if he were
zeroing in on a pirate lair in the asteroid belt. In its own way,
this was as dangerous, perhaps even more so.
Preston guided the ship into an
ever-narrowing orbit, which he stabilized about a hundred miles over
the surface of Ganymede. As his ship swung around the moon's poles in
its tight orbit, he began to figure some fuel computations.
His scratch-pad began to fill with
notations.
Fuel storage –
Escape velocity –
Margin of error –
Safety factor –
Finally he looked up. He had computed
exactly how much spare fuel he had, how much he could afford to
waste. It was a small figure – too small, perhaps.
He turned to the radio. "Ganymede?"
"Where are you, Postal Ship?"
"I'm in a tight orbit about a
hundred miles up," Preston said. "Give me the figures on
the circumference of your Dome, Ganymede?"
"Seven miles," the colonist
said. "What are you planning to do?"
Preston didn't answer. He broke
contact and scribbled some more figures. Seven miles of iceworms, eh?
That was too much to handle. He had planned on dropping flaming fuel
on them and burning them out, but he couldn't do it that way.
He'd have to try a different tactic.
Down below, he could see the
blue-white ammonia ice that was the frozen atmosphere of Ganymede.
Shimmering gently amid the whiteness was the transparent yellow of
the Dome beneath whose curved walls lived the Ganymede Colony. Even
forewarned, Preston shuddered. Surrounding the Dome was a living,
writhing belt of giant worms.
"Lovely," he said. "Just
lovely."
Getting up, he clambered over the
mail sacks and headed toward the rear of the ship, hunting for the
auxiliary fuel-tanks.
Working rapidly, he lugged one out
and strapped it into an empty gun turret, making sure he could get it
loose again when he'd need it.
He wiped away sweat and checked the
angle at which the fuel-tank would face the ground when he came down
for a landing. Satisfied, he knocked a hole in the side of the
fuel-tank.
"Okay, Ganymede," he
radioed. "I'm coming down."
He blasted loose from the tight orbit
and rocked the ship down on manual. The forbidding surface of
Ganymede grew closer and closer. Now he could see the iceworms
plainly.
Hideous, thick creatures, lying
coiled in masses around the Dome. Preston checked his spacesuit,
making sure it was sealed. The instruments told him he was a bare ten
miles above Ganymede now. One more swing around the poles would do
it.
He peered out as the Dome came below
and once again snapped on the radio.
"I'm going to come down and burn
a path through those worms of yours. Watch me carefully, and jump to
it when you see me land. I want that airlock open, or else."
"But –"
"No buts!"
He was right overhead now. Just one
ordinary-type gun would solve the whole problem, he thought. But
Postal Ships didn't get guns. They weren't supposed to need them.
He centered the ship as well as he
could on the Dome below and threw it into automatic pilot. Jumping
from the control panel, he ran back toward the gun turret and slammed
shut the plexilite screen. Its outer wall opened and the fuel-tank
went tumbling outward and down. He returned to his control-panel seat
and looked at the viewscreen. He smiled.
The fuel-tank was lying near the Dome
– right in the middle of the nest of iceworms. The fuel was leaking
from the puncture.
The iceworms writhed in from all
sides.
"Now!" Preston said grimly.
The ship roared down, jets blasting.
The fire licked out, heated the ground, melted snow – ignited the
fuel-tank! A gigantic flame blazed up, reflected harshly off the
snows of Ganymede.
And the mindless iceworms came,
marching toward the fire, being consumed, as still others devoured
the bodies of the dead and dying.
Preston looked away and concentrated
on the business of finding a place to land the ship.
* * * * *
The holocaust still raged as he
leaped down from the catwalk of the ship, clutching one of the heavy
mail sacks, and struggled through the melting snows to the airlock.
He grinned. The airlock was open.
Arms grabbed him, pulled him through.
Someone opened his helmet.
"Great job, Postman!"
"There are two more mail sacks,"
Preston said. "Get men out after them."
The man in charge gestured to two
young colonists, who donned spacesuits and dashed through the
airlock. Preston watched as they raced to the ship, climbed in, and
returned a few moments later with the mail sacks.
"You've got it all,"
Preston said. "I'm checking out. I'll get word to the Patrol to
get here and clean up that mess for you."
"How can we thank you?" the
official-looking man asked.
"No need to," Preston said
casually. "I had to get that mail down here some way, didn't I?"
He turned away, smiling to himself.
Maybe the Chief had
known what he was doing when he took an experienced Patrol man and
dumped him into Postal. Delivering the mail to Ganymede had been more
hazardous than fighting off half a dozen space pirates. I
guess I was wrong, Preston
thought. This is no snap
job for old men.
Preoccupied, he started out through
the airlock. The man in charge caught his arm. "Say, we don't
even know your name! Here you are a hero, and –"
"Hero?" Preston shrugged.
"All I did was deliver the mail. It's all in a day's work, you
know. The mail's got to get through!"
Robert Silverberg is one of
the masters of sci-fi. If you are unfamiliar with his work, check out
the amazon page here and his Wikipedia page here.
For an interview with Rober Silverberg click here
This story is taken from Project Gutenberg.
The etext was produced from Amazing Stories September 1957. For legal
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