perfectly synchronized to their speed the outer shell of the dome opened, closing behind them before they reached the inner shell. it too gaped wide to swallow them, snapping shut like a quickly sprung trap. jordan set the controls in neutral and dropped his hands, muttering to himself. they glided to a stop over the landing pit, thereafter settling slowly. homecoming.

"cheer up," said cameron jauntily. "you're not prisoners."

nona alone seemed not to mind. docchi hadn't said anything for hours and the light was gone from his face. anti wasn't with them; she was back floating in the acid tank. the reentry into the gravity field of the asteroid made it necessary.

the ship scraped gently; they were down. jordan mechanically touched a lever, flicked a switch. passenger and freight locks swung open. "let's go," said cameron. "i imagine there's a reception committee for us."

even he was surprised at what was waiting. the little rocket dome held more ships than normally came in a year. the precise confusion of military discipline was everywhere. armed guards lined either side of the landing ramp and more platoons were in the distance. it was almost amusing to see how dangerous the medicouncil considered them.

near the end of the ramp a large telecom had been set up. if size indicated anything someone thought this was an important occasion. from the screen, larger than life, medicouncilor thorton looked out approvingly.

"a good job, dr. cameron," said the medicouncilor as the procession from the ship halted. "we were quite surprised at the escape of our accidentals and your disappearance which coincided with it. from what we were able to piece together, you followed them deliberately. a splendid example of quick thinking, doctor. you deserve recognition."

"i thought it was my fault for letting them get so far. i had to try to stop them."

"no doubt it was. but you atoned, you atoned. i'm sorry i can't be there in person to congratulate you but i'll arrive soon." the medicouncilor paused discreetly. "at first the publicity was bad, very bad. we thought it unwise to try to conceal it. of course the broadcast made it impossible to hide anything. fortunately the discovery of the gravity drive came along at just the right time. when we announced it opinion began swinging in our direction. i don't mind telling you the net effect is now in our favor."

"i hoped it would be," said cameron. "i don't want them to be hurt. they're all vulnerable, nona especially, because of what she is. i've thought quite a bit about how she should be approached——"

"i'm sure you have." the medicouncilor smiled faintly. "don't let your emotions run away with you. in due time we'll discuss her. for the present see that she and the other accidentals are returned to their usual places. bring docchi to your office at once. he's to be questioned privately."

it was a strange request and mentally cameron retreated. "wait. are you sure you want docchi? he's the engineer but——"

"no objections, doctor," said thorton sternly. "important people are waiting. don't spoil their good opinion of you." the telecom snapped into darkness.

"i think you heard what he said, dr. cameron." the officer at his side was very polite, perhaps because it emphasized the three big planets on his tunic.

"i heard," said cameron irritably. "i don't want to argue with authority but since i'm in charge of this place i demand that you furnish a guard for this girl.

"so you're in charge?" drawled the officer. "you know i've got a funny feeling i'm commander here. my orders said i was to replace you until further notice. i haven't got that notice." he looked around at his men and crooked a finger. "lieutenant, see that the little fella—jordan, i think his name is—gets a lift back to the main dome. and you can walk the pretty lady to her room, or whatever it is she lives in. don't get too personal though unless she encourages it." he smiled condescendingly at cameron. "anything else i can do to oblige a fellow commander?"

cameron glanced at the guards. they were everywhere he looked, smartly uniformed, alert. there was no indication of amusement in the expressions of those near enough to have heard the conversation. they were well disciplined. "nothing else, general," he said stonily. "keep her in sight. you're responsible."

"so i am," remarked the officer pleasantly, winking at the lieutenant. "let's go."

medicouncilor thorton was waiting impatiently on the screen in cameron's office. the attitude suited him well, as if he'd tried many and found slightly concealed discourtesy best for the personality of the busy executive. "we'll arrive in about two hours," he said immediately. "by this i mean a number of top governmental officials, scientists, and some of our leading industrialists. their time is valuable so let's get on with this gravity business."

he caught sight of the commander. "general judd, this is a technical matter. i don't think you'll be interested."

"very well, sir. i'll stand guard outside."

the medicouncilor was silent until the door closed. "sit down, docchi," he said with unexpected solicitude, pausing to note the effect. "i can sympathize with you. everything within your reach—and then to return here. well, i can understand how you feel. but since you did come back i think we can arrange to do things for you."

docchi stared at the screen. a spot of light pulsed in his cheek and then flared rapidly over his face. "you probably will," he said casually. "but what about theft charges? we stole a ship."

"a formality," declared the medicouncilor with earnest simplicity. "with a thing like the discovery, or rediscovery, of the gravity drive, no one's going to worry about an obsolete ship. how else could you test your theories except by trying them out in actual flight?"

the medicouncilor was dulcet, coaxing. "i don't want to mislead you. medically we can't do any more for you than we have. however you'll find yourself the center of a more adequate social life. friends, work, whatever you want. in return for this naturally we'll expect your cooperation."

"wait," said cameron, walking to the screen and standing squarely in front of it. "i don't think you realize docchi's part——"

"don't interrupt," glowered thorton. "i want to reach an agreement at once. it will look very good for us if we can show these famous people how well we work with our patients. now, docchi, how much of the drive can you have on paper by the time we land?"

"he can't have anything," cameron started shouting. "i tried to tell you—he doesn't know——"

"look out," cried thorton too late.

cameron's knees buckled and he clutched his legs in pain. again docchi kicked out and the doctor fell down. docchi aimed another savage blow with his foot that grazed the back of cameron's head. blood trickled from his mouth and he stopped trying to get up.

"docchi," screeched thorton, but there was no answer.

docchi crashed through the door. the commander was lounging against the wall, looking around vacantly. head down docchi plunged into him. the toaster fell from his belt to the floor. with scarcely a pause docchi stamped on it and continued running.

the commander got up, retrieving the weapon. he aimed it at the retreating figure and would have triggered it except that it didn't feel right in his hand. he lowered it and quickly examined the damaged mechanism. sweating, he slipped it gingerly into a tunic pocket.

muffled shouts were coming from cameron's office, growing in vehemence. the general broke in.

the medicouncilor glared at him from the screen. "i see that you let him get away."

the disheveled officer straightened his uniform. "i'm sorry, sir. i didn't think he had that much life in him. i'll alert the guards immediately."

"never mind now. revive that man."

the general wasn't accustomed to resuscitation; saving lives was out of his line. nevertheless in a few minutes cameron was conscious, though somewhat dazed.

"now, doctor, who does know something about the gravity drive if it isn't docchi?"

cameron shook his head groggily. "it was an easy mistake," he said. "cut off from communication with us the drive began to work. how, why, who did it? mostly who. not me, i'm a doctor, not a physicist. nor jordan; he's at best a mechanic. therefore it had to be docchi because he's an engineer." he stopped to wipe the blood from his cheek.

"for god's sake tell me," said thorton. "it couldn't be——"

"no," said cameron with quiet satisfaction. "it wasn't anti either. the last person you'd think of. the little deaf and dumb girl the psychologists wouldn't bother with."

"nona?" said thorton incredulously.

"i told you," said cameron and proceeded to tell him more, filling in the details.

"i see. we overlooked that possibility," said the medicouncilor gravely. "not the mechanical genius of an engineer. instead the strange telepathic sense of a girl. that puts the problem in a different light."

"it's not so difficult though." cameron rubbed the lump on the back of his head. the hair was bristling, clotted with blood. "she can't tell us how she does it. we'll have to find out by experiment, but it won't involve any danger. the monitor can always control the drive."

the medicouncilor laughed shakily, teetering backward. "the monitor is worth exactly nothing. we tried it. for a microsecond it seemed to take over as it always has on other units—but this gravity generator slipped away. we thought docchi found a way to disengage the control circuit."

"but it wasn't docchi who told the computer how to do it."

"we figured it out when we thought it was docchi," growled the medicouncilor wearily. "he was sensible, that's all. it was the only reasonable thing a man could do, come back and take advantage of his discovery." he shook his head in perplexed disgust. "why the girl returned is beyond me."

"do you think——" said cameron and then wished he'd left it unsaid.

"yes, by god, i do think." the medicouncilor's fist crashed down. "docchi knows why. he found out in this room and we told him. as soon as he knew he escaped."

panic slipped into thorton's face and then was gone, covered over almost at once by long habits of sudden decisions. "she could have taken the ship anywhere she wanted and we couldn't stop her. since she's here voluntarily it's obvious what she wants—the asteroid."

the medicouncilor tried to shove himself out of the screen. "don't you ever think, general? there's no real difference between gravity generators except size and power. what she did on the ship she can do as easily here."

"don't worry," said the startled officer. "i'll get her. i'll find the girl and docchi too."

"never mind him," choked the medicouncilor. "i don't care how you do it. take nona at once, without delay."

the time had passed for that command. the great dome overhead trembled and creaked in countless joints. but the structure held though unexpected stresses were imposed on it. and the tiny world shivered, groaning and grumbling at the orbit it had lain too long in. already that was changing—the asteroid began to move.