Robert Heinlein - Expanded Universe

Sam shook his arm. "It's not time to pray; it's time to get busy."

"Okay." Bruce started to straighten up.

"That's not what I meant."

"Huh?"

"There's no point in digging. Once was worth trying; twice is wasting oxygen."

"Well, what do you want me to do?"

"You didn't try all the ways out, did you?"

"No." Bruce thought about it. "I'll try again, Sam. But there isn't air enough to try them all."

"You can search longer than you can shovel. But don't search haphazardly; search back toward the hills. Anywhere else will be just another morning glory; we need to come out at the hills; away from the sand.

"Uh... look, Sam, where are the hills? Down here you can't tell north from next week."

"Over that way," Sam pointed.

"Huh? How do you know?"

"You showed me. When you broke through I could tell where the Sun was from the angle of the light."

"But the Sun is overhead."

"Was when we started. Now it's fifteen, twenty degrees to the west. Now listen: these caves must have been big blow holes once, gas pockets. You search off in that direction and find us a blow hole that's not choked with sand."

"I'll do my darndest!"

"How far away were the hills when we got caught?"

Bruce tried to remember. "Half a mile, maybe."

"Check. You won't find what we want tied to me with five or six hundred feet of line. Take that pad of paper in my pouch. Blaze your way - and be darn sure you blaze enough!"

''I will!''

"Attaboy! Good luck."

Bruce stood up.

It was the same tedious, depressing business as before. Bruce stretched the line, then set out at the end of it, dropping bits of paper and counting his steps. Several times he was sure that he was under the hills, only to come to an impasse. Twice he skirted the heaps that marked other morning glorys. Each time he retraced his steps he gathered up his blazes, both to save paper and to keep from confusing himself.

Once, he saw a glimmer of light and his heart pounded - but it filtered down from a hole too difficult even for himself and utterly impossible for Sam.

His air got low; he paid no attention, other than to adjust his mix to keep it barely in the white. He went on searching.

A passage led to the left, then down; he began to doubt the wisdom of going further and stopped to check the darkness. At first his eyes saw nothing, then it seemed as if there might be a suggestion of light ahead. Eye fatigue? Possibly. He went another hundred feet and tried again. It was light!

Minutes later he shoved his shoulders up through a twisted hole and gazed out over the burning plain.

"Hi!" Sam greeted him. "I thought you had fallen down a hole.

"Darn near did. Sam, I found it!"

"Knew you would. Let's get going."

"Right. I'll dig out my other ski."

"Nope."

"Why not?"

"Look at your air gauge. We aren't going anywhere on skis."

"Huh? Yeah, I guess not." They abandoned their loads, except for air and water bottles. The dark trek was made piggy - back, where the ceiling permitted. Some places Bruce half dragged his partner. Other places they threaded on hands and knees with Sam pulling his bad leg painfully behind him.

Bruce climbed out first, having slung Sam in a bowline before he did so. Sam gave little help in getting out; once they were above ground Bruce picked him up and set him against a rock. He then touched helmets. "There, fellow! We made it!"

Sam did not answer.

Bruce peered in; Sam's features were slack, eyes half closed. A check of his belt told why; the blood - oxygen indicator showed red.

Sam's intake valve was already wide open; Bruce moved fast, giving himself a quick shot of air, then transferring his bottle to Sam. He opened it wide.

He could see Sam's pointer crawl up even as his own dropped toward the red. Bruce had air in his suit for three or four minutes if he held still.

He did not hold still. He hooked his intake hose to the manifold of the single bottle now attached to Sam's suit and opened his valve. His own indicator stopped dropping toward the red. They were Siamese twins now, linked by one partly - exhausted bottle of utterly necessary gas. Bruce put an arm around Sam, settled Sam's head on his shoulder, helmet to helmet, and throttled down both valves until each was barely in the white. He gave Sam more margin than himself, then settled down to wait. The rock under them was in shadow, though the Sun still baked the plain. Bruce looked out, searching for anyone or anything, then extended his aerial. "M'aidez!" he called. "Help us! We're lost."

He could hear Sam muttering. "May day!" Sam echoed into his dead radio. "May day! We're lost."

Bruce cradled the delirious boy in his arm and repeated again, "M'aidez! Get a bearing on us." He paused, then echoed, "May day! May day!"

After a while he readjusted the valves, then went back to repeating endlessly, "May day! Get a bearing on us."

He did not feel it when a hand clasped his shoulder. He was still muttering "May day!" when they dumped him into the air lock of the desert car.

Mr. Andrews visited him in the infirmary at Base Camp. "How are you, Bruce?"

"Me? I'm all right, sir. I wish they'd let me get up."

"My instructions. So I'll know where you are." The Scoutmaster smiled; Bruce blushed.

"How's Sam?" he asked.

"He'll get by. Cold burns and a knee that will bother him a while. That's all."

"Gee, I'm glad."

"The troop is leaving. I'm turning you over to Troop Three, Mr. Harkness. Sam will go back with the grub car.

"Uh, I think I could travel with the Troop, sir."

"Perhaps so, but I want you to stay with Troop Three. You need field experience."

"Uh - " Bruce hesitated, wondering how to say it. "Mr. Andrews?"

"Yes?"

"I might as well go back. I've learned something. You were right. A fellow can't get to be an old Moon hand in three weeks. Uh ... I guess I was just conceited."

"Is that all?"

"Well - yes, sir."

"Very well, listen to me. I've talked with Sam and with Mr. Harkness. Mr. Harkness will put you through a course of sprouts; Sam and I will take over when you get back. You plan on being ready for the Court of Honor two weeks from Wednesday." The Scoutmaster added, "Well?"

Bruce gulped and found his voice. "Yes, sir!"

Once opened, the box could never be closed. But after the myriad swarming Troubles came Hope.

Science fiction is not prophecy. It often reads as if it were prophecy; indeed the practitioners of this odd genre (pun intentional - I won't do it again) of fiction usually strive hard to make their stories sound as if they were true pictures of the future. Prophecies.

Prophesying is what the weatherman does, the race track tipster, the stock market adviser, the fortuneteller who reads palms or gazes into a crystal. Each one is predicting the future - sometimes exactly, sometimes in vague, veiled, or ambiguous language, sometimes simply with a claim of statistical probability, but always with a claim seriously made of disclosing some piece of the future.

This is not at all what a science fiction author does. Science fiction is almost always laid in the future - or at least in a fictional possible - future - and is almost invariably deeply concerned with the shape of that future. But the method is not prediction; it is usually extrapolation and/or speculation. Indeed the author is not required to (and usually does not) regard the fictional "future" he has chosen to write about as being the events most likely to come to pass; his purpose may have nothing to do with the probability that these storied events may happen.

"Extrapolation" means much the same in fiction writing as it does in mathematics: exploring a trend. It means continuing a curve, a path, a trend into the future, by extending its present direction and continuing the shape it has displayed in its past performance - i.e., if it is a sine curve in the past, you extrapolate it as a sine curve in the future, not as an hyperbola, nor a Witch of Agnesi, and most certainly not as a tangent straight line.