"What's up, Chief?" he asked in a low tone.

"Mike hadda hunch," rumbled the Chief. "Somebody tried to smash the stuff you brought. They did. But we started gettin' set to mend it. So what would they do? Polish us off. If they were set to atom-dust the whole Shed an' everybody in it, they wouldn't stop at four more murders."

Joe fished for a pop bottle.

"Mike said something like that back at the Shed," he observed.

"Yeah. But you were the one who figured things out. You'd be first target. Haney and Mike and me—we'd be hard to knock off in a crowd in Bootstrap. But you and her headed off by y'selves. Mike figured you mightn't be safe. So we checked."

Joe brought up one bottle and then another.

"We're all right. Haven't seen a soul."

"Don't mean a soul hasn't seen you," growled the Chief. "A car left Bootstrap less than twenty minutes behind you. There were three guys in it. It's parked down below the dam, outa sight. We saw it. And when we came up, careful, we spotted three guys hidin' out behind the rocks yonder. They look to me like they're waiting for somebody to go strolling back from the shoreline, so's—uh—maybe folks out at the powerhouse can't see 'em. That'd be you and her, huh?"

Joe went cold. Not for himself. For Sally.

"There's nobody else around," said the Chief. "Who'd they be waiting for but you two? Suppose they got a chance to kill you. They'd take the car keys. They'd drop your two bodies somewheres Gawdknowswhere. There'd be considerable of a hunt for you two. Major Holt would be upset plenty. Security might get loosened up. There might be breaks for guys who wanted to do a little extra sabotage—besides maybe hamperin' the repairin' of the pilot gyros. Then they could try for Haney and Mike and me."

Joe said coldly: "I've got a pistol and so has Sally. Shall we take those pistols and go ask those three if they want to start something?"

The Chief snorted.

"Use sense! It's good you got the pistols, though. I snagged a twenty-two rifle from a shooting gallery. It was all I could get in a hurry. But go huntin' trouble? Fella, I want to see that Platform go up! I'll take care of things now. Good layout here. They got to come across the open to get near. Don't say anything to Sally. But we'll keep our eyes open."

Joe nodded. He carried the chilled, dripping bottles back to where Haney solemnly ate a sandwich, sitting crosslegged with his back to the lake and regarding the shore. The Chief dragged a .22 repeating rifle from inside his belt, where it had hung alongside his thigh. He casually strolled over to Mike and dropped the rifle.

"You said you felt like target practice," he remarked blandly. "Here's your armament. Any more sandwiches, ma'am?"

Sally smilingly passed him the last. She left the top of the basket open. The pistol that had been there was gone. Then Sally's eyes met Joe's and she was aware that his three friends had not come here merely to crash a picnic. But she took it in stride. It was an additional reason for Joe to approve of Sally.

"Me," said the Chief largely, "I'm goin' to swim. I haven't had any more water around me than a shower bath for so long that I crave to soak and splash. I'll go yonder and dunk myself."

He wandered off, taking bites from the sandwich as he went. He vanished. Haney leaned back against a sapling, his eyes roving about the shoreline and the rocks and brush behind it.

Mike was talking in his crackling, high-pitched voice.

"But just the same it's crazy! Fighting sabotage when we little guys could take over in a week and make sabotage just plain foolish! We could do the whole job while the saboteurs weren't looking!"

Sally said with interest: "Have you got the figures? Were they ever passed on?"

"I spent a month's pay once," said Mike sardonically, "hiring a math shark to go over them. He found one mistake. It raised the margin of what we could do!"

Sally answered: "Joe! Listen to this! Mike says he has the real answer to sabotage, and, in a way, to space travel! Listen!"

Joe dropped to the ground.

"Shoot it," he said.

He was grimly alert, just the same. There were men waiting for them to start back to the car. These saboteurs were armed, and they intended to murder Sally and himself. Joe's jaws clamped tautly shut at the grim ideas that came into his mind.

But Mike was beginning to speak.

"Forget about the Platform a minute," he said, standing up to gesticulate, because he was only three and a half feet high. "Just figure on a rocket straight to the moon. With old-style rockets they'd a' had to have a mass ratio of a hundred and twenty to one. You'd have to burn a hundred and twenty tons of old-style fuel to land one ton on the moon. Now it could be done with sixty, and when the Platform's up, that figure'll drop again! Okay! You're gonna land a man on the moon. He weighs two hundred pounds. He uses up twenty pounds of food and drink and oxygen a day. Give him grub and air for two months—twelve hundred pounds. A cabin seven feet high and ten feet across. Sixteen hundred pounds, counting insulation an' braces for strength. That makes a pay load of a ton an' a half, and you'd have to burn a hundred an' eighty tons of fuel—old-style—to take it to the moon, and another hundred an' twenty for every ton the rocket ship weighed. You might get a man to the moon with a twelve-hundred-ton rocket—maybe. That's with the old fuels. He'd get there, an' he'd live two months, an' then he'd die for lack of air. With the new fuels you'd need ninety tons of fuel to carry the guy there, and sixty more for every ton the ship weighed itself. Call it six hundred tons for the rocket to carry one man to the moon."

Sally nodded absorbedly.

"I've seen figures like that," she agreed.

"But take a guy like me!" said Mike the midget bitterly. "I weigh forty-five pounds, not two hundred! I use four pounds of food and air a day. A cabin for me to live in would be four feet high an' five across. Bein' smaller, it wouldn't need so much bracing. You could do it for two hundred pounds. Three hundred for grub and air, fifty for me. Me on the moon supplied for two months would come to five-fifty pounds. Sixteen tons of fuel to get me to the moon direct! To carry the weight of the ship—it's smaller!—fifty tons maximum!"

"I—see...," said Sally, frowning.

He looked at her suspiciously, but there was no mockery in her face.

"It'd take a six-hundred-ton rocket to get a full-sized man to the moon," he said with sudden flippancy, "but a guy my size could do the same job of stranglin' in a fifty-ton job. Counting how much easier it'd be to get back, with atmosphere deceleration, I could make a trip, land, take observations, pick up mineral specimens, and get back—all in a sixty-ton rocket. That's just ten per cent of what it'd cost to take a full-sized man one way!"

He stamped his foot. Then he said coldly: "Haney, sittin' still you're a sittin' duck!"

The comment was just. Joe knew that Sally was on the lakeward side of this small island, and that there were impenetrable rocks between her and the mainland. But Haney sat crosslegged where he could watch the mainland, and he hadn't moved in a long while. If someone did intend to commit murder from a distance, Haney was offering a chance for a very fine target. He moved.

"Yeah!" said Mike with fine irony, reverting to his topic. "I could show you plenty of figures! There are other guys like me! We've got as much brains as full-sized people! If the big brass had figured on us small guys, they coulda made the Platform the size of a four-family house an' it'd ha' been up in the sky right now, with guys like me running it. Guys my size could man the ferry rockets bringin' up fuel for storage, and four of us could take a six-hundred-ton rocket an' slide out to Mars an' be back by springtime—next springtime!—with all the facts and the photographs to prove 'em! By golly——"

Then he made a raging, helpless gesture.

"But that's just the big picture," he said bitterly. "Right now, right at this minute, we could make it easy to finish the Platform the way it's building in the Shed! There are ferry rockets building somewhere else. You know about them?"

Sally said apologetically: "Yes. I know there'll be smaller rocket ships going up to the Platform. They'll carry fuel and stores and exchanges for the crew. Yes, I know there are ferry rockets building."

"Those ferry rockets," said Mike sardonically, "carry four men, plus two replacements for the crew. They'll carry air for ten days. But put four of us small guys in a ferry rocket! We'd have air and grub for two months, almost! Pull out the pay load and put in a hydroponic garden and communicators and we'd be a Platform, right then! Send up another ferry rocket to join us, and it could bring guided missiles! The ferry rockets could be finished quicker than the Platform! Send up three ferry rockets with midgets as crews, an' we could weld 'em together and have a Space Platform in orbit and working—and what'd be the use of sabotaging the big Platform then? The job would be done! There'd be no sense sabotaging the big Platform because the little one could do anything the big one could! It'd be up there and working! But," he demanded bitterly, "do you think anybody'll do anything as sensible as that?"

His small features were twisted in angry rebellion. And he was quite right in all his reasoning. Mankind could have made the journey to the planets in a hurry, and it could have had its Space Platform in the sky much more quickly, if only it could have consented to be represented by people like Mike—who would have represented mankind very valiantly.

Sally said distressedly: "Oh, Mike, it's all true and I'm so sorry!"

And she meant it. Joe liked Sally especially right then, because she didn't patronize Mike, or try to reason him out of his heartbreak.

Then Haney said abruptly: "Somebody's spotted the Chief."

Joe mentally kicked himself. The Chief had said he was going to swim. Now—but only now—Joe looked to see what he was doing.

He was far out from shore, swimming unhurriedly to the powerhouse at the middle of the dam. He would reach it, and swing up the ladder that could just be seen going down the lake side of the dam's top, and he would explain the situation on shore. A telephone call to Bootstrap would bring security men rushing at eighty miles an hour, and parachute troopers a good deal faster. But even before they arrived the Chief would lead the powerhouse crew ashore armed with the shotguns they kept for shooting waterfowl in and out of season.

The men on shore might or might not consider the Chief's swim to be proof that he knew their intentions. They were probably discussing the matter in some agitation right now. But they couldn't know that the party on the semi-island was armed.

Suddenly Mike said crisply: "We're goin' to have visitors."

He lay down carefully on the ground, fifteen feet uphill from Sally, where he could look over the ridge. He snuggled the .22 target rifle professionally to his shoulder. He drew a bead.

Three men very casually strolled out of the brushwood on the shore. They moved nonchalantly toward the strand of rocks that led out to the picnic spot. They looked like anybody else from Bootstrap. Casual, rough work clothing.... Haney bent down and picked up four good throwing stones. His expression was pained.

Joe said: "We've got pistols, Haney, and Sally's a good shot."

The men came on. Their manner was elaborately casual. Joe stepped up into view.

"No visitors!" he called. "We don't want company!"

One of the men held his hand to his ear, as if not understanding. They came on. They made no threatening gestures.

Then Joe took his hand out of his pocket, the pistol Sally'd given him gripped tightly.

"I mean that!" he said harshly. "Stand back!"

One of the three spoke sharply. On that instant three snub-nosed pistols appeared. Bullets whined as the men hurtled forward. The purpose was not so much murder at this moment as the demoralizing effect of bullets flying overhead while the three assassins got close enough to do their bloody job with precision.

A stone whizzed by Joe—Haney had thrown it—and the small target rifle in Mike's hands coughed twice. Joe held his fire. He had only six bullets and three targets to hit. With a familiar revolver he'd have started shooting now, but thirty yards is a long range with a strange pistol at a moving target.

One of the three killers stumbled and crashed to the ground. A second seemed suddenly to be grinning widely on one side of his face. A .22 bullet had slashed his cheek. The third ran head on into a rock thrown by Haney. It knocked the breath out of him and his pistol fell from his hand.

Joe fired deliberately at the widely grinning man and saw him spin around. Mike's target rifle spat again and the man Joe had hit wheeled and ran heavily, making incoherent yells. The one who'd tumbled scrambled to his feet and fled, hopping crazily, favoring one leg. Deserted, the third man turned and ran too, still doubled over and still gasping.

Mike's voice crackled. He was in a towering rage because of the way the target rifle shot. It threw high and to the right. The shooting gallery paid off in cigarettes for high scores—so the guns didn't shoot straight.

Until this moment Joe had been relatively calm, because he had something to do. But just then he heard Sally say "Oh!" in a queer voice. He whirled. Unknown to him, she had not been waiting under cover, but standing with her pistol out and ready. And her face was very white, and she was plucking at her hair. A strand came away in her fingers. A bullet had clipped it just above her shoulder.

Then Joe went sick ... weak ... trembling, and he disgraced himself by half-hysterically grabbing Sally and demanding to know if she was hurt, and raging at her for exposing herself to fire, while his throat tried to close and shut off his breath from horror.

There came loud pop-pop-popping noises. With the peculiar reverberation of sound over water, two motorcycles started from the powerhouse along the crest of the dam. They streaked for the shore carrying five men, one of whom was the Chief, with a red-checked tablecloth about his middle, brandishing a fire axe in default of other weapons.

The danger was over.

But the assassins couldn't be followed immediately. They still had at least two pistols. Eight men and a girl, counting Mike, with an armament of only two pistols, a .22 rifle, two shotguns and a fire axe were not a properly equipped posse to hunt down killers. Also by now it was close to sunset.

So the victors did the sensible thing. Joe and Sally and Haney and the Chief—his clothes retrieved—plus Mike headed back for Bootstrap. Joe and Sally rode in the Major's black car, and the other three in the jalopy they'd rented for the afternoon. On the way into the canyon below the dam, they stopped at the parked car their would-be assassins had come in. They removed its distributor and fan belt. The other men returned to the powerhouse with their shotguns and the fire axe, and telephoned to Bootstrap. The three gunmen who had planned murder became fugitives, with no means of transportation but their legs. They had a good many thousand square miles of territory to hide in, but it wasn't likely that they had food or any competence to find it in the wilds. Two were certainly hurt. With dogs and planes and organization, it should be possible to catch them handily, come morning.

So Joe and Sally drove back to Bootstrap with the other car following closely through all the miles that had to be covered in the dark. Halfway back, they met a grim search party in cars, heading for the dam to begin their man hunt in the morning. After that, Joe felt better. But his teeth still tended to chatter every time he thought of Sally's startled, scared expression as she pulled away a lock of her hair that had been severed by a bullet.

When they got back to the Shed, Major Holt looked tired and old. Sally explained breathlessly that her danger was her own fault. Joe'd thought she was safely under cover....

"It was my fault," said the Major detachedly. "I let you go away from the Shed. I do not blame Joe at all."

But he did not look kindly. Joe wet his lips, ready to agree that any disgrace he might be subjected to was justified, since he had caused Sally to be shot at.

"I blame myself a great deal, sir," he said grimly. "But I can promise I'll never take Sally away from safety again. Not until the Platform's up and there's no more reason for her to be in danger."

The Major said remotely: "I shall have to arrange for more than that. I shall put you in touch with your father by telephone. You will explain to him, in detail, exactly how the repair of your apparatus is planned. I understand that the gyros can be duplicated more quickly by the method you have worked out?"

Joe said: "Yes, sir. The balancing of the gyros can, which was the longest single job. But anything can be made quicker the second time. The patterns for the castings are all made, and the bugs worked out of the production process."

"You will explain that to your father," said the Major heavily. "Your father's plant will begin to duplicate these—ah—pilot gyros at once. Meanwhile your—ah—work crew will start to repair the one that is here."

"Yes, sir."

"And," said the Major, "I am sending you to the pushpot airfield. I intend to scatter the targets the saboteurs might aim at. You are one of them. Your crew is another. From time to time you will confer with them and verify their work. If any of them should be—disposed of, you will be able to instruct others."

"It's really the other way about, sir," objected Joe. "The Chief and Haney are pretty good, and Mike's got brains——"

The Major moved impatiently.

"I am looking at this from a security standpoint," he said. "I am trying to make it plainly useless to attack the gyros again. Duplicates will be in production at your father's plant. There will be three men repairing the smashed ones. There will be another man in another place—and this will be you—who can instruct new workmen in the repair procedure if anything should happen. Thus there will have to be three separate successful coups if the pilot gyros are not to be ready when the Platform needs them. Saboteurs might try one. Possibly two. But I think they will look for another weak spot to attack."

Joe did not like the idea of being moved away. He wanted to be on the job repairing the device that was primarily his responsibility. Besides, he had a feeling about Sally. If she were in danger, he wanted to be on hand.

"About Sally, sir——"

"Sally," said the Major tiredly, "is going to have to restrict herself to the point where she'll feel that jail would be preferable. But she will see the need for it. She will be guarded a good deal more carefully than before—and you may not know it, but she has been guarded rather well."

Joe saw Sally smiling ruefully at him. What the Major had said was unpleasant, but he was right. This was one of those arrangements that nobody likes, an irritating, uncomfortable, disappointing necessity. But such necessities are a part of every actual achievement. The difference between things that get done and things that don't get done is often merely the difference between patience and impatience with tedious details. This arrangement would mean that Joe couldn't see Sally very often. It would mean that the Chief and Haney and Mike would do the actual work of getting the gyros ready. It would take all the glamour out of Joe's contribution. These deprivations shouldn't be necessary. But they were.

"All right, sir," said Joe gloomily. "When do I go over to the field?"

"Right away," said the Major. "Tonight." Then he added detachedly: "Officially, the excuse for your presence there will be that you have been useful in uncovering sabotage methods. You have. After all, through you a number of planes that would have been blown up have now had their booby traps removed. I know you do not claim credit for the fact, but it is an excuse for keeping you where I want you to be for another reason entirely. So it will be assumed that you are at the pushpot field for counter-sabotage inspection."

The Major nodded dismissal with an indefinable air of irony, and Joe went unhappily out of his office. He telephoned his father at length. His father did not share Joe's disappointment at being removed to a place of safety. He undertook to begin the castings for an entire new set of pilot gyros at once.

A little later Sally came out of her father's office.

"I'm sorry, Joe!"

He grinned unhappily.

"So am I. I don't feel very heroic, but if this is what has to be done to get the Platform out of the Shed and on the way up—it's what has to be done. I suppose I can phone you?"

"You can," said Sally. "And you'd better!"

They had talked a long time that afternoon, very satisfyingly and without any cares at all. Neither could have remembered much of what had been said. It probably was not earth-shaking in importance. But now there seemed to be a very great deal of other similar conversation urgently needing to be gone through.

"I'll call you!" said Joe.

Then somebody approached to take him to the pushpot airfield. They separated very formally under the eyes of the impersonal security officer who would drive Joe to his destination.

It was a tedious journey through the darkness. This particular security officer was not companionable. He was one of those conscientious people who think that if they keep their mouths shut it will make up for their inability to keep their eyes open. Socially he treated Joe as if he were a highly suspect person. It could be guessed that he treated everybody that way.

Joe went to sleep in the car.

He was only half-awake when he arrived, and he didn't bother to rouse himself completely when he was shown to a cubbyhole in the officers' barracks. He went to bed, making a half-conscious note to buy himself some clothes—especially fresh linen—in the morning.

Then he knew nothing until he was awaked in the early morning by what sounded exactly like the crack of doom.



9

It was not, however, the crack of doom. When Joe stared out the window by the head of his cot, he saw gray-red dawn breaking over the landing field. There were low, featureless structures silhouetted against the sunrise. As the crimson light grew brighter, Joe realized that the angular shapes were hangars. Improbable crane poles loomed above them. One was in motion, handling something he could not make out, but the noise that had awakened him was less, now. It seemed to circle overhead, and it had an angry, droning, buzzing quality that was not natural in any motor he had ever heard before.

Joe shivered, standing at the window. It was cold and dank in the dawn light at this altitude, but he wanted to know what that completely unbelievable roar had been. A crane beam by the hangars tilted down, slowly, and then lifted as if released of a great weight. The light was growing slowly brighter. Joe saw something on the ground. Rather, it was not quite on the ground. It rested on something on the ground.

Suddenly that unholy uproar began again. Something moved. It ran heavily out from the masking dark of the hangars. It picked up speed. It acquired a reasonable velocity—forty or fifty miles an hour. As it scuttled over the dimly lighted field, it made a din like all the boiler factories in the world and all the backfiring motors in creation trying to drown each other's noise out—and all of them being very successful.

It was a pushpot. Joe recognized it with incredulity. It was one of those utterly ungainly creations that were built around one half of the sidewall of the Shed. In shape, its upper part was like the top half of a loaf of bread. In motion, here, it rested on some sort of wheeled vehicle, and it was reared up like an indignant caterpillar, and a blue-white flame squirted out of its tail, with coy and frolicsome flirtings from side to side.

The pushpot lifted from the vehicle on which it rode, and the vehicle put on speed and got away from under it with frantic agility. The vehicle swerved to one side, and Joe stared with amazed eyes at the pushpot, some twenty feet aloft. It had a flat underside, and a topside that still looked to him like the rounded top half of a loaf of baker's bread. It hung in the air at an angle of about forty-five degrees, and it howled like a panic-stricken dragon—Joe was getting his metaphors mixed by this time—and it swung and wobbled and slowly gained altitude, and then suddenly it seemed to get the knack of what it was supposed to do. It started to circle around, and then it began abruptly to climb skyward. Until it began to climb it looked heavy and clumsy and wholly unimpressive. But when it climbed, it really moved!

Joe found his head out the window, craning up to look at it. Its unearthly din took on the indignant quality of an irritated beehive. But it climbed! It went up without grace but with astonishing speed. And it was huge, but it became lost in the red-flecked dawn sky while Joe still gaped.

Joe flung on his clothes. He went out the door through resonant empty corridors, hunting for somebody to tell him something. He blundered into a mess hall. There were many tables, but the chairs around them were pushed back as if used and then left behind by people in a hurry to be somewhere else. There were exactly two people still visible over in a corner.

Another din like the wailing of a baby volcano with a toothache. It began, and moved, and went through the series of changes that ended in a climbing, droning hum. Another. Another. The launching of pushpots for their morning flight was evidently getting well under way.

Joe hesitated in the nearly empty mess hall. Then he recognized the two seated figures. They were the pilot and co-pilot, respectively, of the fateful plane that had brought him to Bootstrap.

He went over to their table. The pilot nodded matter-of-factly. The co-pilot grinned. Both still wore bandages on their hands, which would account for their remaining here.

"Fancy seeing you!" said the co-pilot cheerfully. "Welcome to the Hotel de Gink! But don't tell me you're going to fly a pushpot!"

"I hadn't figured on it," admitted Joe. "Are you?"

"Perish forbid," said the co-pilot amiably. "I tried it once, for the devil of it. Those things fly with the grace of a lady elephant on ice skates! Did you, by any chance, notice that they haven't got any wings? And did you notice where their control surfaces were?"

Joe shook his head. He saw the remnants of ham and eggs and coffee. He was hungry.

There was the uproar to be expected of a basso-profundo banshee in pain. Another pushpot was taking off.

"How do I get breakfast?" he asked.

The co-pilot pointed to a chair. He rapped sharply on a drinking glass. A door opened, he pointed at Joe, and the door closed.

"Breakfast coming up," said the co-pilot. "Look! I know you're Joe Kenmore. I'm Brick Talley and this is Captain—no less than Captain!—Thomas J. Walton. Impressed?"

"Very much," said Joe. He sat down. "What about the control surfaces on pushpots?"

"They're in the jet blast!" said the co-pilot, now identified as Brick Talley. "Like the V Two rockets when the Germans made 'em. Vanes in the exhaust blast, no kidding! Landing, and skidding in on their tails like they do, they haven't speed enough to give wing flaps a grip on the air, even if they had wings to put wing flaps on. Those dinkuses are things to have bad dreams about!"

Again, a door opened and a man in uniform with an apron in front came marching in with a tray. There was tomato juice and ham and eggs and coffee. He served Joe briskly and marched out again.

"That's Hotel de Gink service," said Talley. "No wasted motion, no sloppy civilities. He was about to eat that himself, he gave it to you, and now he'll cook himself a double portion of everything. What are you doing here, anyhow?"

Joe shrugged. It occurred to him that it would neither be wise nor creditable to say that he'd been sent here to split up a target at which saboteurs might shoot.

"I guess I'm attached for rations," he observed. "There'll be orders along about me presently, I suppose. Then I'll know what it's all about."

He fell to on his breakfast. The thunderous noises of the pushpots taking off made the mess hall quiver. Joe said between mouthfuls: "Funny way for anything to take off, riding on—it looked like a truck."

"It is a truck," said Talley. "A high-speed truck. Fifty of them specially made to serve as undercarriages so pushpot pilots can practice. The pushpots are really only expected to work once, you know."

Joe nodded.

"They aren't to take off," Talley explained. "Not in theory. They hang on to the Platform and heave. They go up with it, pushing. When they get it as high as they can, they'll shoot their jatos, let go, and come bumbling back home. So they have to practice getting back home and landing. For practicing it doesn't matter how they get aloft. When they get down, a big straddle truck on caterpillar treads picks them up—they land in the doggonedest places, sometimes!—and brings 'em back. Then a crane heaves them up on a high-speed truck and they do it all over again."

Joe considered while he ate. It made sense. The function of the pushpots was to serve as the first booster stage of a multiple-stage rocket. Together, they would lift the Platform off the ground and get it as high as their jet motors would take it traveling east at the topmost speed they could manage. Then they'd fire their jatos simultaneously, and in doing that they'd be acting as the second booster stage of a multiple-stage rocket. Then their work would be done, and their only remaining purpose would be to get their pilots back to the ground alive, while the Platform on its own third stage shot out to space.

"So," said Talley, "since their pilots need to practice landings, the trucks get them off the ground. They go up to fifty thousand feet, just to give their oxygen tanks a chance to conk out on them; then they barge around up there a while. The advanced trainees shoot off a jato at top speed. It's gauged to build them up to the speed they'll give the Platform. And then if they come out of that and get back down to ground safely, they uncross their fingers. A merry life those guys lead! When a man's made ten complete flights he retires. One flight a week thereafter to keep in practice only, until the big day for the Platform's take-off. Those guys sweat!"

"Is it that bad?"

The pilot grunted. The co-pilot—Talley—spread out his hands.

"It is that bad! Every so often one of them comes down untidily. There's something the matter with the motors. They've got a little too much power, maybe. Sometimes—occasionally—they explode."

"Jet motors?" asked Joe. "Explode? That's news!"

"A strictly special feature," said Talley drily. "Exclusive with pushpots for the Platform. They run 'em and run 'em and run 'em, on test. Nothing happens. But occasionally one blows up in flight. Once it happened warming up. That was a mess! The field's been losing two pilots a week. Lately more."

"It doesn't sound exactly reasonable," said Joe slowly. He put a last forkful in his mouth.

"It's also inconvenient," said Talley, "for the pilots."

The pilot—Walton—opened his mouth.

"It'd be sabotage," he said curtly, "if there was any way to do it. Four pilots killed this week."

He lapsed into silence again.

Joe considered. He frowned.

A pushpot, outside the building, hysterically bellowed its way across the runway and its noise changed and it was aloft. It went spiraling up and up. Joe stirred his coffee.

There were thin shoutings outside. A screaming, whistling noise! A crash! Something metallic shrieked and died. Then silence.

Talley, the co-pilot, looked sick. Then he said: "Correction. It's been five pushpots exploded and five pilots killed this week. It's getting a little bit serious." He looked sharply at Joe. "Better drink your coffee before you go look. You won't want to, afterward."

He was right.

Joe saw the crashed pushpot half an hour later. He found that his ostensible assignment to the airfield for the investigation of sabotage was quaintly taken at face value there. A young lieutenant solemnly escorted him to the spot where the pushpot had landed, only ten feet from a hangar wall. The impact had carried parts of the pushpot five feet into the soil, and the splash effect had caved in the hangar wall-footing. There'd been a fire, which had been put out.

The ungainly flying thing was twisted and torn. Entrails of steel tubing were revealed. The plastic cockpit cover was shattered. There were only grisly stains where the pilot had been.

The motor had exploded. The jet motor. And jet motors do not explode. But this one had. It had burst from within, and the turbine vanes of the compressor section were revealed, twisted intolerably where the barrel of the motor was ripped away. The jagged edges of the tear testified to the violence of the internal explosion.

Joe looked wise and felt ill. The young lieutenant very politely looked away as Joe's face showed how he felt. But of course there were the orders that said he was a sabotage expert. And Joe felt angrily that he was sailing under false colors. He didn't know anything about sabotage. He believed that he was probably the least qualified of anybody that security had ever empowered to look into methods of destruction.

Yet, in a sense, that very fact was an advantage. A man may be set to work to contrive methods of sabotage. Another man may be trained to counter him. The training of the second man is essentially a study of how the first man's mind works. Then it can be guessed what this saboteur will think and do. But such a trained security man will often be badly handicapped if he comes upon the sabotage methods of a second man—an entirely different saboteur who thinks in a new fashion. The security man may be hampered in dealing with the second man's sabotage just because he knows too much about the thinking of the first.

Joe went off and scowled at a wall, while the young lieutenant waited hopefully nearby.

He was in a false position. But he could see that there was something odd here. There was a sort of pattern in the way the other sabotage incidents had been planned. It was hard to pick out, but it was there. Joe thought of the trick of booby-trapping a plane during its major overhaul, and then arming the traps at a later date.... A private plane had been fitted to deliver proximity rockets in mid-air when the transport ship flew past. There was the explosion of the cargo parcel which was supposed to contain requisition forms and stationery. And the attempt to smash the entire Platform by getting an atomic bomb into a plane and having a saboteur shoot the crew and then deliver the bomb at the Shed in an officially harmless aircraft....

The common element in all those sabotage tricks was actually clear enough, but Joe wasn't used to thinking in such terms. He did know, though, that there was a pattern in those devices which did not exist in the blowing up of jet motors from inside.

He scowled and scowled, racking his brains, while the young lieutenant watched respectfully, waiting for Joe to have an inspiration. Had Joe known it, the lieutenant was deeply impressed by his attempt at concentration on the problem it had not been Major Holt's intention for Joe to consider. When Joe temporarily gave up, the young lieutenant eagerly showed him over the whole field and all its workings.

In mid-morning another pushpot fell screaming from the skies. That made six pushpots and six pilots for this week—two today. The things had no wings. They had no gliding angle. Pointed up, they could climb unbelievably. While their engines functioned, they could be controlled after a fashion. But they were not aircraft in any ordinary meaning of the word. They were engines with fuel tanks and controls in their exhaust blast. When their engines failed, they were so much junk falling out of the sky.

Joe happened to see the second crash, and he didn't go to noon mess at all. He hadn't any appetite. Instead, he gloomily let himself be packed full of irrelevant information by the young lieutenant who considered that since Joe had been sent by security to look into sabotage, he must be given every possible opportunity to evaluate—that would be the word the young lieutenant would use—the situation.

But all the time that Joe followed him about, his mind fumbled with a hunch. The idea was that there was a pattern of thinking in sabotage, and if you could solve it, you could outguess the saboteur. But the trouble was to figure out the similarity he felt existed in—say—a private plane shooting rockets and overhaul mechanics planting booby traps and faked shippers getting bombs on planes—and come to think of it, there was Braun....

Braun was the key! Braun had been an honest man, with an honest loyalty to the United States which had given him refuge. But he had been blackmailed into accepting a container of atomic death to be released in the Shed. Radioactive cobalt did not belong in the Shed. That was the key to the pattern of sabotage. Braun was not to use any natural thing that belonged in the Shed. He was to be only the means by which something extraneous and deadly was to have been introduced.

That was it! Somebody was devising ingenious ways to get well-known destructive devices into places where they did not belong, but where they would be effective. Rockets. Bombs. Even radioactive cobalt dust. All were perfectly well-known means of destruction. The minds that planned those tricks said, in effect: "These things will destroy. How can we get them to where they will destroy something?" It was a strict pattern.

But the pushpot sabotage—and Joe was sure it was nothing else—was not that sort of thing. Making motors explode.... Motors don't explode. One couldn't put bombs in them. There wasn't room. The explosions Joe had seen looked as if they'd centered in the fire basket—technically the combustion area—behind the compressor and before the drive vanes. A jet motor whirled. Its front vanes compressed air, and a flame burned furiously in the compressed air, which swelled enormously and poured out past other vanes that took power from it to drive the compressor. The excess of blast poured out astern in a blue-white flame, driving the ship.

But one couldn't put a bomb in a fire basket. The temperature would melt anything but the refractory alloys of which a jet motor has to be built. A bomb placed there would explode the instant a motor was started. It couldn't resist until the pushpot took off. It couldn't....

This was a different kind of sabotage. There was a different mind at work.

In the afternoon Joe watched the landings, while the young lieutenant followed him patiently about. A pushpot landing was quite unlike the landing of any other air-borne thing. It came flying down with incredible clumsiness, making an uproar out of all proportion to its landing speed. Pushpots came in with their tail ends low, crudely and cruelly clumsy in their handling. They had no wings or fins. They had to be balanced by their jet blasts. They had to be steered the same way. When a jet motor conked out there was no control. The pushpot fell.

He carefully watched one landing now. It came down low, and swung in toward the field, and seemed to reach its stern down tentatively to slide on the earth, and the flame of its exhaust scorched the field, and it hesitated, pointing up at an ever steeper angle—and it touched and its nose tilted forward—and leaped up as the jet roared more loudly, and then touched again....

The goal was for pushpots to touch ground finally with the whole weight of the flying monstrosity supported by the vertical thrust of the jet, and while it was moving forward at the lowest possible rate of speed. When that goal was achieved, they flopped solidly flat, slid a few feet on their metal bellies, and lay still. Some hit hard and tried to dig into the earth with their blunt noses. Joe finally saw one touch with no forward speed at all. It seemed to try to settle down vertically, as a rocket takes off. That one fell over backward and wallowed with its belly plates in the air before it rolled over on its side and rocked there.

The last of a flight touched down and flopped, and the memory of the wreckage had been overlaid by these other sights and Joe could think of his next meal without aversion. When it was evening-mess time he went doggedly back to the mess hall. There was a sort of itchy feeling in his mind. He knew something he didn't know he knew. There was something in his memory that he couldn't recall.

Talley and Walton were again at mess. Joe went to their table. Talley looked at him inquiringly.

"Yes, I saw both crashes," said Joe gloomily, "and I didn't want any lunch. It was sabotage, though. Only it was different in kind—it was different in principle—from the other tricks. But I can't figure out what it is!"

"Mmmmmm," said Talley, amiably. "You'd learn something if you could talk to the Resistance fighters and saboteurs in Europe. The Poles were wonderful at it! They had one chap who could get at the tank cars that took aviation gasoline from the refinery to the various Nazi airfields. He used to dump some chemical compound—just a tiny bit—into each carload of gas. It looked all right, smelled all right, and worked all right. But at odd moments Hitler's planes would crash. The valves would stick and the engine'd conk out."

Joe stared at him. And it was just as simple as that. He saw.

"The Nazis lost a lot of planes that way," said Talley. "Those that didn't crash from stuck valves in flight—they had to have their valves reground. Lost flying time. Wonderful! And when the Nazis did uncover the trick, they had to re-refine every drop of aviation gas they had!"

Joe said: "That's it!"

"That's it? And it is what?"

Then Joe said disgustedly: "Surely! It's the trick of loading CO_2 bottles with explosive gas, too! Excuse me!"

He got up from the table and hurried out. He found a phone booth and got the Shed, and then the security office, and at long last Major Holt. The Major's tone was curt.

"Yes?... Joe?... The three men from the affair of the lake were tracked this morning. When they were cornered they tried to fight. I am afraid we'll get no information from them, if that's what you wanted to know."

The Major's manner seemed to disapprove of Joe as expressing curiosity. His words meant, of course, that the three would-be murderers had been fatally shot.

Joe said carefully: "That wasn't what I called about, sir. I think I've found out something about the pushpots. How they're made to crash. But my hunch needs to be checked."

The Major said briefly: "Tell me."

Joe said: "All the tricks but one, that were used on the plane I came on, were the same kind of trick. They were all arrangements for getting regular destructive items—bombs or rockets or whatever—where they could explode and smash things. The saboteurs were adding destructive items to various states of things. But there was one trick that was different."

"Yes?" said the Major, on the telephone.

"Putting explosive gas in the CO_2 bottles," said Joe painstakingly, "wasn't adding a new gadget to a situation. It was changing something that was already there. The saboteurs took something that belonged in a plane and changed it. They did not put something new into a plane—or a situation—that didn't belong there. It was a special kind of thinking. You see, sir?"

The Major, to do him justice, had the gift of listening. He waited.

"The pushpots," said Joe, very carefully, "naturally have their fuel stored in different tanks in different places, as airplanes do. The pilots switch on one tank or another just like plane pilots. In the underground storage and fueling pits, where all the fuel for the pushpots is kept in bulk, there are different tanks too. Naturally! At the fuel pump, the attendant can draw on any of those underground tanks he chooses."

The Major said curtly: "Obviously! What of it?"

"The pushpot motors explode," said Joe. "And they shouldn't. No bomb could be gotten into them without going off the instant they started, and they don't blow that way. I make a guess, sir, that one of the underground storage tanks—just one—contains doctored fuel. I'm guessing that as separate tanks in a pushpot are filled up, one by one, one is filled from a particular underground storage tank that contains doctored fuel. The rest will have normal fuel. And the pushpot is going to crash when that tank, and only that tank, is used!"

Major Holt was very silent.

"You see, sir?" said Joe uneasily. "The pushpots could be fueled a hundred times over with perfectly good fuel, and then one tank in one of them would explode when drawn on. There'd be no pattern in the explosions...."

Major Holt said coldly: "Of course I see! It would need only one tank of doctored fuel to be delivered to the airfield, and it need not be used for weeks. And there would be no trace in the wreckage, after the fire! You are telling me there is one underground storage tank in which the fuel is highly explosive. It is plausible. I will have it checked immediately."

He hung up, and Joe went back to his meal. He felt uneasy. There couldn't be any way to make a jet motor explode unless you fed it explosive fuel. Then there couldn't be any way to stop it. And then—after the wreck had burned—there couldn't be any way to prove it was really sabotage. But the feeling of having reported only a guess was not too satisfying. Joe ate gloomily. He didn't pay much attention to Talley. He had that dogged, uncomfortable feeling a man has when he knows he doesn't qualify as an expert, but feels that he's hit on something the experts have missed.

Half an hour after the evening mess—near sunset—a security officer wearing a uniform hunted up Joe at the airfield.

"Major Holt sent me over to bring you back to the Shed," he said politely.

"If you don't mind," said Joe with equal politeness, "I'll check that."

He went to the phone booth in the barracks. He got Major Holt on the wire. And Major Holt hadn't sent anybody to get him.

So Joe stayed in the telephone booth—on orders—while the Major did some fast telephoning. It was comforting to know he had a pistol in his pocket, and it was frustrating not to be allowed to try to capture the fake security officer himself. The idea of murdering Joe had not been given up, and he'd have liked to take part personally in protecting himself. But it was much more important for the fake security man to be captured than for Joe to have the satisfaction of attempting it himself.

As a matter of fact, the fake officer started his getaway the instant Joe went to check on his orders. The officer knew they'd be found faked. It had not been practical for him to shoot Joe down where he was. There were too many people around for this murderer to have a chance at a getaway.

But he didn't get away, at that. Twenty minutes later, while Joe still waited fretfully in the phone booth, the phone bell rang and Major Holt was again on the wire. And this time Joe was instructed to come back to the Shed. He had exact orders whom to come with, and they had orders which identified them to Joe.

Some eight miles from the airfield—it was just dusk—Joe came upon a wrecked car with motorcycle security guards working on it. They stopped Joe's escort. Joe's phone call had set off an alarm. A plane had spotted this car tearing away from the airfield, and motorcyclists were guided in pursuit by the plane. When it wouldn't stop—when the fake Security officer in it tried to shoot his way clear—the plane strafed him. So he was dead and his car was a wreck, and the motorcycle men were trying to get some useful information from his body and the car.

Joe went to the Major's house in the officers'-quarters area. The Major looked even more tired than before, but he nodded approvingly at Joe. Sally was there too, and she regarded Joe with a look which was a good deal warmer than her father's.

"You did very well," said the Major detachedly. "I don't have too high an opinion of the brains of anybody your age, Joe. When you are my age, you won't either. But whether you have brains or simply luck, you are turning out to be very useful."

Joe said: "I'm getting security conscious, sir. I want to stay alive."

The Major regarded him with irony.

"I was thinking of the fact that when you worked out the matter of the doctored pushpot fuel, you did not try to be a hero and prove it yourself. You referred it to me. That was the proper procedure. You could have been killed, investigating—it's clear that the saboteurs would be pleased to have a good chance to murder you—and your suspicions might never have reached me. They were correct, by the way. One storage tank underground was half-full of doctored fuel. Rather more important, another was full, not yet drawn on."

The Major went on, without apparent cordiality: "It seems probable that if this particular sabotage trick had not been detected—it seems likely that on the Platform's take-off, all or most of the pushpots would have been fueled to explode at some time after the Platform was aloft, and before it could possibly get out to space."

Joe felt queer. The Major was telling him, in effect, that he might have kept the Platform from crashing on take-off. It was a good but upsetting sensation. It was still more important to Joe that the Platform get out to space than that he be credited with saving it. And it was not reassuring to hear that it might have been wrecked.

"Your reasoning," added the Major coldly, "was soundly based. It seems certain that there is not one central authority directing all the sabotage against the Platform. There are probably several sabotage organizations, all acting independently and probably hating each other, but all hating the Platform more."

Joe blinked. He hadn't thought of that. It was disheartening.

"It will really be bad," said the Major, "if they ever co-operate!"

"Yes, sir," said Joe.

"But I called you back from the airfield," the Major told him without warmth, "to say that you have done a good job. I have talked to Washington. Naturally, you deserve a reward."

"I'm doing all right, sir," said Joe awkwardly. "I want to see the Platform go up and stay up!"

The Major nodded impatiently.

"Naturally! But—ah—one of the men selected and trained for the crew of the Platform has been—ah—taken ill. In strict confidence, because of sabotage it has been determined to close in the Platform and get it aloft at the earliest possible instant, even if its interior arrangements are incomplete. So—ah—in view of your usefulness, I said to Washington that I believed the greatest reward you could be offered was—ah—to be trained as an alternate crew member, to take this man's place if he does not recover in time."

The room seemed to reel around Joe. Then he gulped and said: "Yes, sir! I mean—that's right. I mean, I'd rather have that, than all the money in the world!"

"Very well." The Major turned to leave the room. "You'll stay here, be guarded a good deal more closely than before, and take instructions. But you understand that you are still only an alternate for a crew member! The odds are definitely against your going!"

"That's—that's all right, sir," said Joe unsteadily. "That's quite all right!"

The Major went out. Joe stood still, trying to realize what all this might mean to him. Then Sally stirred.

"You might say thanks, Joe."

Her eyes were shining, but she looked proud, too.

"I put it in Dad's head that that was what you'd like better than anything else," she told him. "If I can't go up in the Platform myself—and I can't—I wanted you to. Because I knew you wanted to."

She smiled at him as he tried incoherently to talk. With a quiet maternal patience, she led him out on the porch of her father's house and sat there and listened to him. It was a long time before he realized that she was humoring him. Then he stopped short and looked at her suspiciously. He found that in his enthusiastic gesticulations he had been gesticulating with her hand as well as his own.

"I guess I'm pretty crazy," he said ruefully. "Shooting off my mouth about myself up there in space.... You're pretty decent to stand me the way I am, Sally."

He paused. Then he said humbly: "I'm plain lucky. But knowing you and—having you like me reasonably much is pretty lucky too!"

She looked at him noncommittally.

He added painfully: "And not only because you spoke to your father and told him just the right thing, either. You're—sort of swell, Sally!"

She let out her breath. Then she grinned at him.

"That's the difference between us, Joe," she told him. "To me, what you just said is the most important thing anybody's said tonight."



10

The world turned over on its axis with unfailing regularity, and nights followed mornings and mornings followed nights according to well-established precedent. One man turned up in Bootstrap with radiation burns, but he had not offered himself for check over at the hospital. He was found dead in his lodging. Since nobody else appeared to have suffered any burns at all, it was assumed that he was the messenger who had brought the radioactive cobalt to Braun, who also had been doomed by possession of the deadly stuff, but who had broken the chain of fatality by not dumping it free into the air of the Shed. Under the circumstances, then, three-shift work on the Platform was resumed, and three times in each twenty-four hours fleets of busses rolled out of Bootstrap carrying men to work in the Shed, and rolled back again loaded with men who had just stopped working there.

Trucks carried materials to the Shed, and swing-up doors opened in the great dome's eastern wall, and the trucks went in and unloaded. Then the trucks went out of the same doors and trundled back for more materials. In the Shed, shining plates of metal swung aloft, and welding torches glittered in the maze of joists and upright pipes that still covered the monster shape. Each day it was a little more nearly complete. In a separate, guarded workshop by a sidewall, the Chief and Haney and Mike the midget labored mightily to accomplish the preposterous. They grew lean and red-eyed from fatigue, and short of temper and ever more fanatical—and security men moved about in seeming uselessness but never-ceasing vigilance.

There were changes, though. The assembly line of pushpots grew shorter, and the remaining monstrosities around the sidewall were plainly near to completion. There came a day, indeed, when only five ungainly objects remained on that line, and even they were completely plated in and needed only a finishing touch. It was at this time that more crates and parcels arrived from the Kenmore Precision Tool plant, and Joe dropped his schoolroomlike instruction course in space flight for work of greater immediate need. He and his allies worked twice around the clock to assemble the replaced parts with the repaired elements of the pilot gyros. They grew groggy from the desperate need both for speed and for absolute accuracy, but they put the complex device together, and adjusted it, and surveyed the result through red-rimmed eyes, and were too weary to rejoice.

Then Joe threw a switch and the reconstituted pilot gyro assembly began to hum quietly, and the humming rose to a whine, and the whine went deliberately up the scale until it ceased to be audible at all. Presently a dial announced the impossible, and they gazed at a device that seemed to be doing nothing whatever. The gyros appeared quite motionless. They spun with such incredible precision that it was not possible to detect that they moved a hairbreadth. And the whole complex device looked very simple and useless.

But the four of them gazed at it—now that it worked—with a sudden passionate satisfaction. Joe moved a control, and the axis of the device moved smoothly to a new place and stayed there. He moved the control again, and it moved to another position and stayed there. And to another and another and another.

Then the Chief took Joe's place, and under his hand the seemingly static disks—which were actually spinning at forty thousand revolutions per minute—turned obediently and without any appearance of the spectacular. Then Haney worked the controls. And Mike put the device through its paces.

Mike left the gyros spinning so that the main axis pointed at the sun, invisible beyond the Shed's roof. And then all four of them watched. It took minutes for this last small test to show its results. But visibly and inexorably the pilot gyros followed the unseen sun, and they would have resisted with a force of very many tons any attempt to move them aside by so little as one-tenth of a second of arc, which would mean something like one three-hundred-thousandth of a right angle. And these pilot gyros would control the main gyros with just this precision, and after the Platform was out in space could hold the Platform itself with the steadiness needed for astronomical observation past achievement from the surface of the Earth.

The pilot gyros, in a word, were ready for installation.

Joe and Haney and the Chief and Mike were not beautiful to look at. They were begrimed from head to toe, and their eyes were bloodshot, and they were exhausted to the point where they did not even notice any longer that they were weary. And their mental processes were not at all normal, so that they were quarrelsome and arbitrary and arrogant to the men with the flat-bed trailer who came almost reverently to move their work. They went jealously with the thing they had rebuilt, and they were rude to engineers and construction workers and supervisors, and they shouted angrily at each other as it was hoisted up a shaft that had been left in the Platform for its entrance, and they were very far from tactful as they watched with hot, anxious eyes as it was bolted into place.

It would be welded later, but first it was tried out. And it moved the main gyros! They weighed many times what the pilot gyros did, but even when they were spinning the pilot gyros stirred them. Of course the main-gyro linkage to the fabric of the Shed had to be broken for this test, or the gyros would have twisted the giant upon its support and all the scaffolding around it would have been broken and the men on it killed.

But the gyros worked! They visibly and unquestionably worked! They controlled the gigantic wheels that would steer the Platform in its take-off, and later would swing it to receive the cargo rockets coming up from Earth. The pilot instrument worked! There was no vibration. In its steering apparatus the Platform was ready for space!

Then the Chief yawned, and his eyes glazed as he stood in the huge gyro room. And Haney's knees wobbled, and he sat down and was instantly asleep. Then Joe vaguely saw somebody—it was Major Holt—holding Mike in his arms as if Mike were a baby. Mike would have resented it furiously if he had been awake. And then suddenly Joe didn't know what was going on around him, either.

There was a definite hiatus in his consciousness. He came back to awareness very slowly. He was half-awake and half-asleep for a long time. He only knew contentedly that his job was finished. Then, slowly, he realized that he was in a bunk in one of the Platform sleeping cabins, and the inflated cover that was Sally's contribution to the Platform held him very gently in place. Somehow it was infinitely soothing, and he had an extraordinary sensation of peacefulness and relaxation and fulfillment. The pilot gyros were finished and in position. His responsibility to them was ended. And he had slept the clock around three times. He'd slept for thirty-six hours. He was starving.

Sally had evidently constituted herself a watch over Joe as he slept, because she faced him immediately when he went groggily out of the cabin to look for a place to wash. He was still covered with the grime of past labor, and he had been allowed to sleep with only his shoes removed. He was not an attractive sight. But Sally regarded him with an approval that her tone belied.

"You can get a shower," she told him firmly, "and then I'll have some breakfast for you. Fresh clothes are waiting, too."

Joe said peacefully: "The gyros are finished and they work!"

"Don't I know?" demanded Sally. "Go get washed and come back for breakfast. The Chief and Haney and Mike are already awake. And because of the four of you, they've been able to advance the Platform's take-off time—to just two days off! It leaked out, and now it's official. And you made it possible!"

This was a slight exaggeration, but it was pardonable because of Sally's partiality for Joe. He went groggily into the special shower arrangement in the Platform. In orbit, there would be no gravity, so a tub bath was unthinkable. The shower cabinet was a cubbyhole with handgrips on all four sides and straps into which one could slip his feet. When Joe turned handles, needle sprays sprang at him from all sides, and simultaneously a ventilator fan began to run. When in space that fan could draw out what would otherwise become an inchoate mixture of air and quite weightless water-drops. In space a man might drown in his own shower bath without the fan. The apparatus for collecting the water again was complex, but Joe didn't think about that at the moment. He considered ruefully that however convenient this system might be out in the Platform's orbit, it left something to be desired on Earth.

But there were clean clothes waiting when he came out. He dressed and felt brand new and utterly peaceful and rested, and it seemed to him very much like the way he had often felt on a new spring morning. It was very, very good!

Then he smelled coffee and became ravenous.

There were the others in the Platform's kitchen, sitting in the chairs that had straps on them so the crew needn't float about because of weightlessness. There was an argument in progress. The Chief grinned at Joe. Mike the midget looked absorbed. Haney was thinking something out, rather painfully. Sally was busy at the Platform's very special stove. She had ham and eggs and pancakes ready for Joe to eat.

"Gentlemen," she said, "you are about to eat the first meal ever cooked in a space ship—and like it!"

She served them and sat companionably down with them all. But her eyes were very warm when she looked at Joe.

"Leavin' aside what we were arguin' about," said the Chief blissfully, "Sally here—mind if I call you Sally, ma'am?—she says the slide-rule guys have given our job the works and they say it's a better job than they designed. Take a bow, Joe."

Sally said firmly: "When the technical journals are through talking about the job you did, you'll all four be famous for precision-machining technique and improvements on standard practices."

"Which," said the Chief sarcastically, "is gonna make us feel fine when we're back to welding and stuff!"

"No more welding," Sally told him. "Not on this job. The Platform's closed in. They've started to take down the scaffolding."

The Chief looked startled. Haney asked: "Laying off men yet?"

"Not you," Sally assured him. "Definitely not you. You four have the very top super-special security rating there is! I think you're the only four people in the world my father is sure can't be reached, somehow, to make you harm the Platform."

Mike said abruptly: "Yeah. The Major thought he had headaches before. Now he's really got 'em!"

Mike hadn't seemed to be listening. He'd acted as if he were feverishly absorbing the feel of being inside the Platform—not as a workman building it, but as a man whose proper habitat it would become. But Joe suddenly realized that his comment was exact. There'd been plenty of sabotage to prevent the Platform from reaching completion. But now it was ready to take off in two days. If it was to be stopped, it would have to be stopped within forty-eight hours by people with plenty of resources, who for their own evil ends needed it to be stopped. These last two days would contain the last-ditch, most desperate, most completely ruthless stepped-up attempts at destruction that could possibly be made. And Major Holt had to handle them.

But the four at table—five, with Sally—were peculiarly relaxed. The matter they'd handled had been conspicuous, perhaps, but it was still only one of thousands that had to be accomplished before the Platform could take off. But they had the infinitely restful feeling of a job well done.

"No more welding," said Haney meditatively, "and our job on the gyros finished. What are we gonna do?"

The Chief said forcefully: "Me, I'm gonna sweep floors or something, but I'm sure gonna stick around and watch the take-off!"

Joe said nothing. He looked at Sally. She became very busy, making certain the others did not want more to eat. After a long time Joe said, with very careful casualness, "Come to think of it, I was getting loaded up with astrogation theory when I had to stop and pitch in on the gyros. How's that sick crew member, Sally?"

"I—wouldn't know," answered Sally unconvincingly. "Have some more coffee?"

Joe made his face go completely expressionless. There was nothing else to do. Sally hadn't said that his chances looked bad for making the crew of the Platform when it went out to space. But Sally had ways of knowing things. She would be sure to keep informed on a matter like that, because she was wearing Joe's ring and it would have taken a great deal of discouragement to keep her from finding out good news to tell him. She didn't have any good news. So it must be bad.

Joe drank his coffee, trying to make himself believe that he'd known all along he wasn't going to make the crew. He'd started late to learn the things a crew member ought to know. He'd stopped at the most crucial part of his training to work on the gyros, which were more crucial still. He'd slept a day and a half. The platform would take off in forty-eight hours. He tried to reason carefully that it was common sense to use a man who was fully trained from the beginning for a place in the crew, rather than a latecomer like himself. But it wasn't easy to take.

Mike the midget said suddenly: "I got a hunch."

"Shoot it," said the Chief, amiably.

"I got a hunch I know what kind of sabotage will be tried next—and when," said Mike.

The others looked at him—all but Joe, who stared at the wall.

"There hasn't been one set of guys trying to smash the Platform," said Mike excitedly. "There's been four or five. Joe found a gang sabotaging the pushpots that didn't think like the gang that blackmailed Braun. And the gang that tried to kill us up at Red Canyon may be another. There could be others: fascists and commies and nationalists and crackpots of all kinds. And they all know they've got to work fast, even if they have to help each other. Get it?"

Haney growled.

"I'll buy what you've said so far," said the Chief. "Sure! Those so-and-sos will all pile in everything they got at the last minute. They'll even pull together to smash the Platform—and then double-cross each other afterward. But what'll they do, an' when?"

"This time they'll try outright violence," said Mike coldly, "instead of sneaking. They'll try something really rough. For sneaking, one time's as good as another, but for really rough stuff, there's just one time when the Platform hasn't got plenty of guys around ready to fight for it."

The Chief whistled softly.

"You mean change-shift time! Which one?"

"The first one possible," said Mike briefly. "After every shift, things will get tighter. So my guess is the next shift, if they can. And if one gang starts something, the others will have to jump right in. You see?"

That made sense. One attempt at actual violence, defeated, would create a rigidity of defense that would make others impossible. If a successful attempt at violent sabotage was to be made, the efforts of all groups would have to be timed to the first, or abandoned.

"I could—uh—set up a sort of smoke screen," said Mike. "We'll fake we're going to smash something—and let those saboteurs find it out. They'll see it as a chance to do their stuff with us to run interference for them.—Sally, does your father sure-enough trust us?"

Sally nodded.

"He doesn't talk very cordially, but he trusts you."

"Okay," said Mike. "You tell him, private, that I'm setting up something tricky. He can laugh off anything his security guys report that I'm mixed up in. Joe'll see that he gets the whole picture beforehand. But he ain't to tell anybody—not anybody—that something is getting framed up. Right?"

"I'll ask him," said Sally. "He is pretty desperate. He's sure some last-minute frantic assault on the Platform will be made. But——"

"We'll tip him in plenty of time," said Mike with authority. "In time for him to play along, but not for a leak to spoil things. Okay?"

"I'll make the bargain," Sally assured him, "if it can be made."

Mike nodded. He drained his coffee cup and slipped down from his chair.

"Come on, Chief! C'mon, Haney!"

He led them out of the room.

Joe fiddled with his spoon a moment, and then said: "The crewman I was to have subbed for if he didn't get well—he did, didn't he?"

Sally answered reluctantly: "Y-yes."

Joe said measuredly: "Well, then—that's that! I guess it will be all right for me to stick around and watch the take-off?"

Sally's eyes were misty.

"Of course it will, Joe! I'm so sorry!"

Joe grinned, but even to himself his face seemed like a mask.

"Into each life some rain must fall. Let's go out and see what's been accomplished since I went to sleep. All right?"

They went out of the Platform together. And as soon as they reached the floor of the Shed it was plain that the stage had been set for stirring events.

The top five or six levels of scaffolding had already been removed, and more of the girders and pipes were coming down in bundles on lines from giraffelike cranes. There were some new-type trucks in view, too, giants of the kind that carry ready-mixed concrete through city streets. They were pouring a doughy white paste into huge buckets that carried it aloft, where it vanished into the mouths of tubes that seemed to replace the scaffolding along the Platform's sides.

"Lining the rockets," said Sally in a subdued voice.

Joe watched. He knew about this, too. It had been controversial for a time. After the pushpots and their jatos had served as the first two stages of a multiple-rocket aggregation, the Platform carried rocket fuel as the third stage. But the Platform was a highly special ballistic problem. It would take off almost horizontally—a great advantage in fueling matters. This was practical simply because the Platform could be lifted far beyond effective air resistance, and already have considerable speed before its own rockets flared.

Moreover, it was not a space ship in the sense of needing rockets for landing purposes. It wouldn't land. Not ever. And again there was the fact that men would be riding in it. That ruled out the use of eight- and ten- and fifteen-gravity acceleration. It had to make use of a long period of relatively slow acceleration rather than a brief terrific surge of power. So its very special rockets had been designed as the answer.

They were solid-fuel rockets, though solid fuels had been long abandoned for long-range missiles. But they were entirely unlike other solid-fuel drives. The pasty white compound being hauled aloft was a self-setting refractory compound with which the rocket tubes would be lined, with the solid fuel filling the center. The tubes themselves were thin steel—absurdly thin—but wound with wire under tension to provide strength against bursting, like old-fashioned rifle cannon.

When the fuel was fired, it would be at the muzzle end of the rocket tube, and the fuel would burn forward at so many inches per second. The refractory lining would resist the rocket blast for a certain time and then crumble away. Crumbling, the refractory particles would be hurled astern and so serve as reaction mass. When the steel outer tubes were exposed, they would melt and be additional reaction mass.

In effect, as the rocket fuel was exhausted, the tubes that contained it dissolved into their own blast and added to the accelerating thrust, even as they diminished the amount of mass to be accelerated. Then the quantity of fuel burned could diminish—the tubes could grow smaller—so the rate of speed gain would remain constant. Under the highly special conditions of this particular occasion, there was a notable gain in efficiency over a liquid-fuel rocket design. For one item, the Platform would certainly have no use for fuel pumps and fuel tanks once it was in its orbit. In this way, it wouldn't have them. Their equivalent in mass would have been used to gain velocity. And when the Platform finally rode in space, it would have expended every ounce of the driving apparatus used to get it there.

Now the rocket tubes were being lined and loaded. The time to take-off was growing short indeed.

Joe watched a while and turned away. He felt very good because he'd finished his job and lived up to the responsibility he'd had. But he felt very bad because he'd had an outside chance to be one of the first men ever to make a real space journey—and now it was gone. He couldn't resent the decision against him. If it had been put up to him, he'd probably have made the same hard decision himself. But it hurt to have had even a crazy hope taken away.

Sally said, trying hard to interest him, "These rockets hold an awful lot of fuel, Joe! And it's better than scientists thought a chemical fuel could ever be!"

"Yes," said Joe.

"Fluorine-beryllium," said Sally urgently. "It fits in with the pushpots' having pressurized cockpits. Rockets like that couldn't be used on the ground! The fumes would be poisonous!"

But Joe only nodded in agreement. He was apathetic. He was uninterested. He was still thinking of that lost trip in space. He realized that Sally was watching his face.

"Joe," she said unhappily, "I wish you wouldn't look like that!"

"I'm all right," he told her.

"You act as if you didn't care about anything," she protested, "and you do!"

"I'm all right," he repeated.

"I'd like to go outside somewhere," she said abruptly, "but after what happened up at the lake, I mustn't. Would you like to go up to the top of the Shed?"

"If you want to," he agreed without enthusiasm.

He followed when she went to a doorway—with a security guard beside it—in the sidewall. She flashed her pass and the guard let them through. They began to walk up an inclined, endless, curving ramp. It was between the inner and outer skins of the Shed. There had to be two skins because the Shed was too big to be ventilated properly, and the hot desert sunshine on one side would have made "weather" inside. There'd have been a convection-current motion of the air in the enclosed space, and minor whirlwinds, and there could even be miniature thunderclouds and lightning. Joe remembered reading that such things had happened in a shed built for Zeppelins before he was born.

They came upon an open gallery, and there was a security man looking down at the floor and the Platform. He had a very good view of all that went on.

They went around another long circuit of the slanting gallery, dimly lighted with small electric bulbs. They came to a second gallery, and saw the Platform again. There was another guard here.

They were halfway up the globular wall now, and were visibly suspended over emptiness. The view of the Platform was impressive. There were an astonishing number of rocket tubes being fastened to the outside of that huge object. Three giant cranes, working together, hoisted a tube to the last remaining level of scaffolding, and men swarmed on it and fastened it to the swelling hull. As soon as it was fast, other men hurried into it with the white pasty stuff to line it from end to end. The tubes would nearly hide the structure they were designed to propel. But they'd all be burned away when it reached its destination.

"Wonderful, isn't it?" asked Sally hopefully.

Joe looked, and said without warmth, "It's the most wonderful thing that anybody ever even tried to do."

Which was true enough, but the zest of it had unreasonably departed for Joe for the time being. His disappointment was new.

Halfway around again, Sally opened a door, and Joe was almost surprised out of his lethargy. Here was a watching post on the outside of the monstrous half-globe. There were two guards here, with fifty-caliber machine guns under canvas hoods. Their duties were tedious but necessary. They watched the desert. From this height it stretched out for miles, and Bootstrap could be seen as a series of white specks far away with hills behind it.

Ultimately Sally and Joe came to the very top of the Shed into the open air. From here the steep plating curved down and away in every direction. The sunshine was savagely bright and shining, but there was a breeze. And here there was a considerable expanse fenced in—almost an acre, it seemed. There were metal-walled small buildings with innumerable antennae of every possible shape for the reception of every conceivable wave length. There were three radar bowl reflectors turning restlessly to scan the horizon, and a fourth which went back and forth, revolving, to scan the sky itself. Sally told Joe that in the very middle—where there was a shed with a domelike roof which wasn't metal—there was a wave-guide radar that could spot a plane within three feet vertically, and horizontally at a distance of thirty miles, with greater distances in proportion.

There were guns down in pits so their muzzles wouldn't interfere with the radar. There were enough non-recoil anti-aircraft guns to defend the Shed against anything one could imagine.

"And there are jet planes overhead too," said Sally. "Dad asked to have them reinforced, and two new wings of jet fighters landed yesterday at a field somewhere over yonder. There are plenty of guards!"

The Platform was guarded as no object in all history had ever been guarded. It was ironic that it had to be protected so, because it was actually the only hope of escape from atomic war. But that was why some people hated the Platform, and their hatred had made it seem obviously an item of national defense. Ironically that was the reason the money had been provided for its construction. But the greatest irony of all was that its most probable immediate usefulness would be the help it would give in making nuclear experiments that weren't safe enough to make on Earth.

That was pure irony. Because if those experiments were successful, they should mean that everybody in the world would in time become rich beyond envy.

But Joe couldn't react to the fact. He was drained and empty of emotion because his job was done and he'd lost a very flimsy hope to be one of the Platform's first crew.

He didn't really feel better until late that night, when suddenly he realized that life was real and life was earnest, because a panting man was trying to strangle Joe with his bare hands. Joe was hampered in his self-defense because a large number of battling figures trampled over him and his antagonist together. They were underneath the Platform, and Joe expected to be blown to bits any second.



11

Joe sat on the porch of Major Holt's quarters in the area next to the Shed. It was about eight-thirty, and dark, but there was a moon. And Joe had come to realize that his personal disappointment was only his personal disappointment, and that he hadn't any right to make a nuisance of himself about it. Therefore he didn't talk about the thing nearest in his mind, but something else that was next nearest or farther away still. Yet, with the Shed filling up a full quarter of the sky, and a gibbous moon new-risen from the horizon, it was not natural for a young man like Joe to speak purely of earthly things.

"It'll come," he said yearningly, staring at the moon. "If the Platform gets up day after tomorrow, it's going to take time to ferry up the equipment it ought to have. But still, somebody ought to land on the moon before too long."

He added absorbedly: "Once the Platform is fully equipped, it won't take many rocket pay loads to refill a ship's tanks at the Platform, before it can head on out."

Mathematically, a rocket ship that could leave the Platform with full fuel tanks should have fuel to reach the moon and land on it, and take off again and return to the Platform. The mathematical fact had a peculiar nagging flavor. When a dream is subjected to statistical analysis and the report is in its favor, a dreamer's satisfaction is always diluted by a subconscious feeling that the report is only part of the dream. Everybody worries a little when a cherished dream shows a likelihood of coming true. Some people take firm steps to stop things right there, so a romantic daydream won't be spoiled by transmutation into prosaic fact. But Joe said doggedly: "Twenty ferry trips to pile up fuel, and the twenty-first ship should be able to refuel and go on out. And then somebody will step out on the moon!"

He was disappointed now. He wouldn't be the one to do it. But somebody would.

"You might try for the ferry service," said Sally uneasily.

"I will," said Joe grimly, "but I won't be hoping too much. After all, there are astronomers and physics sharks and such things, who'll be glad to learn to run rockets in order to practice their specialties out of atmosphere."

Sally said mournfully: "I can't seem to say anything to make you feel better!"

"But you do," said Joe. He added grandiloquently, "But for your unflagging faith in me, I would not have the courage to bear the burdens of everyday life."

She stamped her foot.

"Stop it!"

"All right." But he said quietly, "You are a good kid, Sally. You know, it's not too bright of me to mourn."

She drew a deep breath.

"That's better! Now, I want——"

There was a gangling figure walking down the concrete path between the trim, monotonous cottages that were officers' quarters at the Shed.

Joe said sharply: "That's Haney! What's he doing here?" He called, "Haney!"

Haney's manner took on purpose. He came across the grass—the lawns around the officers' quarters contained the only grass in twenty miles.

"Hiya," said Haney uncomfortably. He spoke politely to Sally. "Hiya. Uh—you want to get in on the party, Joe?"

"What kind?"

"The party Mike was talkin' about," said Haney. "He's set it up. He wants me to get you and a kinda—uh—undercover tip-off to Major Holt."

Joe stirred. Sally said hospitably: "Sit down. You've noticed that my father gave you full security clearance, so you can go anywhere?"

Haney perched awkwardly on the edge of the porch.

"Yeah. That's helped with the party. It's how I got here, as far as that goes. Mike's on top of the world."

"Shoot it," said Joe.

"Y'know he's been pretty bitter about things," said Haney carefully. "He's been sayin' that little guys like him ought to be the spacemen. There's half a dozen other little guys been working on the Platform too. They can get in cracks an' buck rivets an' so on. Useful. He's had 'em all hopped up on the fact that the Platform coulda been finished months ago if it'd been built for them, an' they could get to the moon an' back while full-sized guys couldn't an' so on. Remember?"

"I remember," said Sally.

"They've all been beefin' about it," explained Haney. "People know how they feel. So today Mike went and talked to one or two of 'em. An' they started actin' mysterious, passin' messages back an' forth an' so on. Little guys, actin' important. Security guys wouldn't notice 'em much. Y'don't take a guy Mike's size serious, unless you know him. Then he's the same as anybody else. So the security guys didn't pay any attention to him. But some other guys did. Some special other guys. They saw those little fellas actin' like they were cookin' up somethin' fancy. An' they bit."

"Bit?" asked Sally.

"They got curious. So Mike an' his gang got confidential. An' they're going to have help sabotagin' the Platform when the next shift changes. The midgets gettin' even for bein' laughed at, see? They're pretending their plan is that when the Platform's sabotaged—not smashed, but just messed up so it can't take off—the big brass will let 'em take a ferry rocket up in a hurry, an' get it in orbit, an' use it for a Platform until the big Platform can be mended an' sent up. Once they're up there, there's no use tryin' to stop the big Platform. So it can go ahead."

Joe said dubiously: "I think I see...."

"Mike and his gang of little guys are bein' saps—on purpose. If anybody's goin' to pull some fast stuff, next shift change—that's the time everybody's got to! Last chance! Mike and his gang don't know what's gonna happen, but they sure know when! They're invitin' the real saboteurs to make fools of 'em. And what'll happen?"

Joe said drily: "The logical thing would be to feel sorry for the big guys who think they're smarter than Mike."

"Uh-huh," said Haney, deadly serious. "Mike's story is there's half a dozen rocket tubes already loaded. They're goin' to fire those rockets between shifts. The Platform gets shoved off its base an' maybe dented, and so on. Mike's gang say they got the figures to prove they can go up in a ferry rocket an' be a Platform, and the big brass won't have any choice but to let 'em."

Sally said: "I don't think they know how the big brass thinks."

Haney and Joe said together, "No!" and Joe added: "Mike's not crazy! He knows better! But it's a good story for somebody who doesn't know Mike."

Haney said in indignation: "I came out here to ask the Major to help us. The Chief's gettin' a gang together, too. There's some Indians of his tribe that work here. We can count on them for plenty of rough stuff. And there's Joe and me. The point is that Mike's stunt makes it certain that everything busts loose at a time we can know in advance. If the Major gives us a free hand, and then in the last five minutes takes his own measures—so they can't leak out ahead of time and tip off the gangs we want to get—we oughta knock off all the expert saboteurs who know the weak spots in the Platform. For instance those who know that thermite in the gyros would mess everything up all over again."

Joe said quietly: "But Major Holt has to be told well in advance about all this! That's absolute!"

"Yeah," agreed Haney. "But also he has got to keep quiet—not tell anybody else! There've been too many leaks already about too many things. You know that!"

Joe said: "Sally, see if you can get your father to come here and talk. Haney's right. Not in his office. Right here."

Sally got up and went inside the house. She came back with an uneasy expression on her face.

"He's coming. But I couldn't very well tell him what was wanted, and—I'm not sure he's going to be in a mood to listen."

When the Major arrived he was definitely not in a mood to listen. He was a harried man, and he was keyed up to the limit by the multiplied strain due to the imminence of the Platform's take-off. He came back to his house from a grim conference on exactly the subject of how to make preparations against any possible sabotage incidents—and ran into a proposal to stimulate them! He practically exploded. Even if provocation should be given to saboteurs to lure them into showing their hands, this was no time for it! And if it were, it would be security business. It should not be meddled in by amateurs!

Joe said grimly: "I don't mean to be disrespectful, sir, but there's a point you've missed. It isn't thinkable that you'll be able to prevent something from being tried at a time the saboteurs pick. They've got just so much time left, and they'll use it! But Mike's plan would offer them a diversion under cover of which they could pull their own stuff! And besides that, you know your office leaks! You couldn't set up a trick like this through security methods. And for a third fact, this is the one sort of thing no saboteur would expect from your security organization! We caught the saboteurs at the pushpot field by guessing at a new sort of thinking for sabotage. Here's a chance to catch the saboteurs who'll work their heads off in the next twenty-four hours or so, by using a new sort of thinking for security!"

Major Holt was not an easy man to get along with at any time, and this was the worst of all times to differ with him. But he did think straight. He stared furiously at Joe, growing crimson with anger at being argued with. But after he had stared a full minute, the angry flush went slowly away. Then he nodded abruptly.

"There you have a point," he said curtly. "I don't like it. But it is a point. It would be completely the reverse of anything my antagonists could possibly expect. So I accept the suggestion. Now—let us make the arrangements."

He settled down for a quick, comprehensive, detailed plan. In careful consultation with Haney, Joe worked it out. The all-important point was that the Major's part was to be done in completely unorthodox fashion. He would take measures to mesh his actions with those of Mike, the Chief, Haney, and Joe. Each action the Major took and each order he gave he would attend to personally. His actions would be restricted to the last five minutes or less before shift-change time. His orders would be given individually to individuals, and under no circumstances would he transmit any order through anybody else. In every instance, his order would be devised to mean nothing intelligible to its recipient until the time came for obedience.

It was not an easy scheme for the Major to bind himself to. It ran counter to every principle of military thinking save one, which was that it was a good idea to outguess the enemy. At the end he said detachedly: "This is distinctly irregular. It is as irregular as anything could possibly be! But that is why I have agreed to it. It will be at least—unexpected—coming from me!"

Then he smiled without mirth and nodded to Joe and to Haney, and went striding away down the concrete walk to where his car waited.

Haney left a moment later to carry the list of arrangements to the Chief and to Mike. And Joe went into the Shed to do his part.

There was little difference in the appearance of the Shed by night. In the daytime there were long rows of windows in the roof, which let in a vague, dusky, inadequate twilight. At night those windows were shuttered. This meant that the shadows were a little sharper and the contrasts of light and shade a trifle more abrupt. All other changes that Joe could see were the normal ones due to the taking down of scaffolding and the fastening up of rocket tubes. It was clear that the shape of the Platform proper would be obscure when all its rocket tubes were fast in place.

Joe went to look at the last pushpots, and they were ready to be taken over to their own field for their flight test before use. There were extras, anyhow, beyond the number needed to lift the Platform. He found himself considering the obvious fact that after the Platform was aloft, they would be used to launch the ferry rockets, too.

Then he moved toward the center of the Shed. A whole level of scaffolding came apart and its separate elements were bundled together as he watched. Slings lowered the bundles down to waiting trucks which would carry them elsewhere. There were mixing trucks still pouring out their white paste for the lining of the rocket tubes, and their product went up and vanished into the gaping mouths of the giant wire-wound pipes.

Presently Joe went into the maze of piers under the Space Platform itself. He came to the temporary stairs he had reason to remember. He nodded to the two guards there.

"I want to take another look at that gadget we installed," he said.

One of the guards said good-naturedly: "Major Holt said to pass you any time."

He ascended and went along the curious corridor—it had handgrips on the walls so a man could pull himself along it when there was no weight—and went to the engine room. He heard voices. They were speaking a completely unintelligible language. He tensed.

Then the Chief grinned at him amiably. He was in the engine room and with him were no fewer than eight men of his own coppery complexion.

"Here's some friends of mine," he explained, and Joe shook hands with black-haired, dark-skinned men who were named Charley Spotted Dog and Sam Fatbelly and Luther Red Cow and other exotic things. The Chief said exuberantly, "Major Holt told the guards to let me pass in some Indian friends, so I took my gang on a guided tour of the Platform. None of 'em had ever been inside before. And——"