looked at the viewers. Still lots of stars. Still closer to the core. And it took still longer for the computer to chuckle its way to a conclusion about location, for the stars around them were not included on the ship's charts and the computer had to backcheck behind them until it found a familiar correlation. Once again, and again, and a long wait for charging with a storm of solar winds eddying and seething around the ship, straining the capacity of the radiation shields built between the hulls. «One more time,» she told Mop. She pushed the button. Mother leapt. Mop sat down, his long hair hiding his rear legs, lifted his sharp little muzzle toward what the ship's gravity told him was the ceiling, and howled. Erin jumped, startled. «Don't do that,» she said. Mop lifted his nose and howled once more, then lay down with his nose between his front legs. Erin felt little sheets of shivers running up and down her spine. She punched in an all-direction scan, watched the screens closely. Stars and more stars. Then, toward the core, oddly enough, a big blackness. She punched in magnification, her heart pounding. She hadn't really expected to find an isolated binary so near the galaxy's heart. But there they were, two stars of equal brightness. She punched in orders. Optics whirred into position. The twin stars were separated by 9.5 astronomical units, had an orbital period of 44.5 years. The mass of the nearer sun was .96 of the sun of New Earth, the star by which man measured all others. The farther star was slightly larger in mass than the New Sun, which accounted for the fact that, even though it was more distant, it had the same apparent brightness as the nearer star. The nearer star was sterile, alone in its assigned volume of space. The other had whelped. She had to make a short Blink to get near enough for the ship's instruments to pick up the family of planets circling the more distant, larger star. So far everything on the chart was checking out. She put the Mother Lode on flux and, while she gathered data and recharged the generator, had a bath, gave Moppy one—much to his disgust—dried her hair and his with a blower, and then held Moppy up to the viewer to show him the sights. The ship flew past two uninhabitable planets, one a frozen ball of ice, the other a gas giant. «Well, my boy,» she told Mop, «it's just the way Dad's old buddy said it was.» She felt herself becoming just a bit excited as Mother neared her destination. She was quite close, astronomically speaking, before Mother's sensors could pick up the belt of asteroids located roughly in what would have been the star's life zone. Beyond the asteroid belt were two small bodies, one not much larger than a respectable moon, orbiting so close to the sun that they were nothing more than scorched rock. Not all life zone planets were number three planets, but most were. Once, apparently, this sun had had a third planet, a world positioned in that relatively narrow, highly critical area just close enough to a sun to condense water, not close enough for the water to boil away, and not far enough away for the water to freeze permanently. Now, in the orbit of the third planet, the ship's instruments picked up a band of rubble. The jumble of rocks extended far and away, curving in both directions, making a ring of space rubbish all around the sun. She let the ship fall closer, whistled when the optics showed that it was really crowded in there, that the chunks of rock, asteroids large and small, were so close together that maneuvering among them was going to be, at best, thrilling. She gave the ship directions. Gyros whined. The ship turned slowly, taking up an orbit parallel to and at a safe distance from the asteroid belt. She jumped when Mother's detectors pinged a warning, but before she could act a chunk of rock the size of an interplanetary freighter rolled past not over a half mile away. The tumbling asteroid didn't make a roar of threat, as debris sometimes did in the more amateurish space operas, but even without sound it was menacing enough to send Erin scampering to the controls to put more distance between her and the belt. She had a good sleep before approaching the asteroids again. Then, heart pounding, she turned the ship's detectors to maximum power and upped Mother's speed a bit. She zapped in close to the belt, holding her breath, matched velocity with the nearest large rock. The rock was tumbling slowly. It had ragged, sharp edges. No rain, no friction, no nothing in space to weather it. It was as big on one relatively flat surface as a city block, rounded on the other three sides. She edged the ship closer, turned on the detectors. Not much happened. She moved on to make another nerve-racking approach to a slowly tumbling rock mountain and used the detectors again. Nothing. It was four hours and several fruitless tries later that she pulled up alongside a smaller chunk of rock and turned on the detectors to hear them sing out loudly of heavy metals. She did some fine tuning and nodded. «Well, Mr. Mop,» she said, «There's gold in them thar hills, after all.» It was challenging as hell to bring the ship closer and closer to the slowly tumbling chunk of mass and inertia. One little misjudgment and it was one helluva long walk home. She edged up to a flat surface, teased Mother into followed the tumbling motion, hit the guidance jets, yelped as the landing gear contacted the rock. Mop said, «Yipe.» «Now you're worried?» she asked, as she adjusted the field to include the big rock and to effectively attach it to the ship. She let the computer measure the roll and tumble and fed impulses into the flux drive and guidance jets until the disturbing motions were stilled and the ship and rock, held together by the power of Mother's giant generator, sailed serenely along without so much as a wobble. «My boy,» she said, «things are looking up.» There was a huge vein of gold directly under the ship. She took up station in the second crew's cabin, which her father had turned into a control room for the raining equipment. Soon an extractor arm was using a laser to boil rock away from the vein of gold and, before the end of her first work day, she had not just some gold, but pounds of gold aboard ship. Gold so pure that it seemed to glow. When the vein of almost pure gold ran out she moved ship, using the extractor arm to pull Mother to a new position. There was gold, but it wasn't nearly as pure as the first vein. She lifted ship and spent several days trying to find another source as rich as that of the first day. After a week of it, she came to the conclusion that she was not going to get rich in a matter of days, that the first vein had been a fluke. Not that there weren't fortunes contained in the asteroid belt. There was enough gold and platinum metals and silver to make her one of the richest people in the U.P., but it wasn't going to be all that easy. The Mother Lode wasn't going to go home laden with nuggets of pure gold, but she would go back with very, very rich ore filling all available cargo spaces. Heck, it might even take two or three trips out there to make her as rich as she decided she wanted to be. She started loading gold-rich ore. It was picky work. First the areas containing gold had to be searched out by instrument, then Mother had to be positioned. The ship couldn't sit on a needle point of rock, so some very rich sounding areas had to be bypassed in order to find a fairly flat landing place. Moving in and out of the tumbling, crowded asteroid belt ceased to be so thrilling she could hardly stand it and came to be just spine-tinglingly terrifying. She'd been working for just under a month when she decided to scout around a bit before attaching the ship to another asteroid. She circled the sun in an orbit outside the belt. The density of the belt was about equal all the way around. She saw chunks that were large enough to make fairly respectable moons for a small planet. She had forgotten her loneliness. She had her work. She had very good company. Mop was not demanding. He fed and watered himself by pushing on his Mop buttons at his station. He had been trained to use an ingenious little pad in the exercise room that broke his body wastes down into recyclable liquids immediately and pulled the smells in behind them. He didn't talk a lot. In fact, except for that meaningful grunt which said, «Please, Erin, rub my belly,» he'd been silent since his disturbed howling had chilled Erin. On the opposite side of the orbital ring of debris she jockeyed Mother down onto a flat surface, stabilized the tumble, put out the extractor arm, and began to load ore that was the richest she'd seen since the first day. The detectors were humming merrily about gold and she was humming a little song that had been rewritten with some rather ribald lyrics by the junior officers aboard Rimfire. She was just about ready to knock off for the day when there was a clear tone, a vibrant, piercing tone that jerked her to attention. She stopped the movement of the arm and focused a viewer on the biter at the end. The vibrant, piercing tone of alert continued to sing in her ears. She saw something a bit lighter in color than the gold bearing rock, reached back to kill the foreign object alert, turned on a powerful light, lowered the viewer until its nozzle almost touched the biter at the end of the extractor arm. «Woah,» she whispered. All around her was the vacuum of space, the coldness and emptiness, the uncaring, glaring stars. The nearest planet, a bit larger than New Earth, was a chemical swamp with surface temperatures hot enough to ignite paper, if there'd been any oxygen in the poisonous atmosphere. Nearer the sun were the two cinder planets, lifeless rock baked by the solar storms. Far away, out past the chemical swamp planet, was a frozen, airless ball of ice. And at the tip of the excavator arm, still half encased in the matrix rock, was a fossilized skull, a skull that looked up at her with dark, eyeless sockets, a skull that had to be incredibly ancient, and was very damned definitely humanoid. Man had been twice in space. A very few had soared upward from Old Earth on the fire of primitive chemical rockets. Centuries later man had broken the bounds of planetary gravity once more, this time with the help of old Billy Bob Blink's invention that made star travel less dangerous and much less time-consuming. Man had been in space for the second time for thousands of years and in all that time he had encountered intelligence only in the mutated forms of life that had survived the Destruction of Old Earth. He had found evidence of alien intelligence, but the aliens were all dead—the residents of the Dead Worlds and the two races who clung together in a clasp of death as galaxies collided in Cygnus. The decades of work on Old Earth since the reunion had taught man much about himself. From her classes at the Academy Erin knew that life on Old Earth had begun millions of years in the past, but that man, himself, was a relative newcomer. The humanoid skull staring up at her with its blank, dark eyes was as old or older than the anthropoid remains that had been discovered in fossil form on Old Earth since the reunion. Here, then, was evidence of another manlike race. Whether or not the skull represented intelligence she could not guess, but she knew that X&A scientists would consider it to be of more importance than the gold and gold ore she had stowed in Mother's bins. She moved the extractor arm slightly. The skull was still attached to the matrix rock. «Well, damn,» she said. Mop looked up questioningly. «I can't believe I'm going to do this,» she said. Mop followed her to the air lock and watched anxiously as she worked her way into a suit. «Sorry, fella, this trip isn't for you,» she said. She took the dog to the control room, closed the door behind her, felt panic for one moment not because she was scared, but because if anything happened to her out there, Mop would be left all alone to punch out his food and water until it was all gone and then— «Oh, damn,» she moaned, as she closed the helmet and sucked air. «Oh, shit,» she said, as the inner hatch closed and a pump whined as it evacuated air from the lock. «Balls,» she whispered, as the outer hatch opened and she stared out into the big empty. CHAPTER FOUR She felt stiff and heavy as she stepped out of the hatch onto the ship's ladder. She could never get enough oxygen into her lungs while she was imprisoned inside a flexsuit. The feeling of being slowly suffocated was psychological, for the air mixture in the suit was richer than that aboard ship. She halted for a moment before turning around to adjust the tool kit strapped to her back. The hatch started to close behind her. She did not hear it, of course, but she felt the slight vibration of its movement coming up through her boots. She turned and was mesmerized as the opening narrowed. When the crack closed and the hatch snugged itself into its seal, she felt panic. What if? What if the hatch lock didn't respond to her instructions when she was ready to go back into the ship? She had only a few hours of air. With the oxygen gone, she would never decay. She would be held on the surface of the asteroid by the field of the ship's generator until, perhaps years from now, the generator used up its full charge and cooled. Would she then drift away from the rock to tumble free in her own eternal orbit around an alien sun? She had performed extravehicular work before, but never alone. There had been times when teams of crewmen in suits had swarmed over the outside hide of Rimfire to check her condition, but each man had been teamed with another. Every spacer who had faced the void knew the devastating effect of looking at the big empty through an impossibly frail faceplate from the doubtful security of a flexsuit. It was S.O.P. to never, never, send a man outside the ship without a buddy. There near the core, with legions, hoards, multitudes of brilliant stars surrounding her, she felt more isolated than she had felt while space walking in the nothingness outside the galaxy when she had to look in one direction to see the misty mass of the Milky Way, when there was nothing but blankness on three sides. She was dwarfed. She felt as if she were being infinitely diminished. She turned and with a shaking hand punched the entry combination into the lock. The hatch began to open. She took a deep breath and let it out, canceled the open order, turned her face up toward the viewport in the control room. She saw the shaggy face of Mop. His sharp nose and alert eyes followed her movement as she climbed down the ladder. She waved and said, «Hold the fort, buddy. I'll be back before you know it.» The Mother Lode was in harsh sunlight. The surface of the asteroid was not level so that the ship seemed to be tilted. From the inside the lopsided stance had not mattered, since the reference for the senses was the ship's own grav