"I'll ask my father when I can." She glanced toward the ceiling. "He is still busy with the ship's officers.

I'm sorry you're afraid of my mother. She doesn't hate you, not really. If she seems cool to you, it's just because she has worked so long at the site, digging up relics of the first world. She thinks you seem so-so primitive."

She shook her head at our uneasy frowns.

"You told her you lied to the ship." She looked at Casey. "That bothers her, because the nanorobs do not transmit untruths or let people hurt each other. She feels sorry for you."

Pepe winced. "We feel sorry for ourselves."

Tling sat for a minute, silently, frowning, and turned back to us.

"The ship is big trouble for my father," she told us. "It leaves him no time for you. He says you should have stayed on the Moon."

"I know." Casey shrugged. "But we're here. We can't go back. We want to stay alive."

"I feel your fear." She gave us an uneasy smile. "My father's too busy to talk to you, but if you'll come to my room, there is news about the ship."

The room must have been her nursery. In one corner was a child's bed piled with dolls and toys, a cradle on the floor beside it. The wall above was alive with a scenic holo. Long-legged birds flew away from a water hole when a tiger came out of tall gra.s.s to drink. A zebra stallion ventured warily close, snuffing at us. A prowling leopard froze and ran from a bull elephant. She gestured at the wall.

"I was a baby here, learning to love the animals."

That green landscape was suddenly gone. The wall had become a wide window that showed us great s.p.a.cecraft drifting though empty blackness. Blinding highlights glared where the Sun struck it. The rest was lost in shadow, but I made out a thick bright metal disk, slowly turning. Tiny-looking sliders clung around a bulging dome at its center."It's in parking orbit, waiting for anywhere to go," Tling said. "Let's look inside."

She gave us glimpses of the curving floors where the spin created a false gravity. People sat in rows of seats like those in holos of ancient aircraft. More stood crowded in aisles and corridors. I heard sc.r.a.ps of hushed and anxious talk.

". . . home on a Pacific island."

The camera caught a woman with a crown of what looked like bright golden feathers instead of hair.

Holding a whimpering baby in one arm, the other around a grim-faced man, she was answering questions from someone we didn't see. The voice we heard was Tling's.

"It's hard for us." Her lips were not moving, but the voice went sharp with her distress. "We had a good life there. Mark's an imagineer. I was earning a good living as a genetic artist, designing ornamentals to special order. We are not the pioneer type, but we did want a baby." An ironic wry smile twisted her lips. "A dream come true!"

She lifted the infant to kiss its gold-capped head.

"Look at us now." She smiled sadly at the child. "We spent our savings for a vision of paradise on Fendris Four. A tropical beach-front between the surf and a bamboo forest, snow on a volcanic cone behind it. A hundred families of us, all friends forever."

She sighed and rocked the baby.

"They didn't let us off the ship. Or even tell us why. We're desperate, with our money gone and baby to care for. Now they say there's nowhere else we can go."

The wall flickered and the holos came back with monkeys chattering in jungle treetops.

"That's the problem," Tling said. "Two thousand people like them, stuck on the ship with nowhere to live. My father's problem now, since the council voted to put him in charge."

Casey asked, "Why can't they leave the ship?"

"If you don't understand-" She was silent for a moment. "My mother says it's the way of the nanorobs.

They won't let people overrun the planet and use it up like my mother says the primitives did, back before the impacts. Births must be balanced by migration. Those unlucky people lost their s.p.a.ce when they left Earth."

"Eight hundred years ago?"

"Eight hundred of our time." She shrugged. "A day or so of theirs."

"What can your father do for them?"

"My mother says he's still searching for a safe destination."

"If he can't find one-" Casey frowned. "And they can't come home. It seems terribly unfair. Do you let the nanorobs rule you?"

"Rule us?" Puzzled, she turned her head to listen and nodded at the wall. "You don't understand. They do unite us, but there is no conflict. They live in all of us, acting to keep us alive and well, guiding us tostay free and happy, but moving us only by our own consent. My mother says they are part of what you used to call the unconscious."

"Those people on the ship?" Doubtfully, Casey frowned. "Still alive, I guess, but not free to get off or happy at all."

"They are troubled." Nodding soberly, she listened again. "But my mother says I should explain the nanorob way. She says the old primitives lived in what she calls the way of the jungle genes, back when survival required traits of selfish aggression. The nanorobs have let us change our genes to escape the greed and jealousy and violence that led to so much crime and war and pain on the ancient Earth. They guide us toward what is best for all. My mother says the people on the ship will be content to follow the nanorob way when my father has helped them find it."

She turned her head. "I heard my mother call."

I hadn't heard a thing, but she ran out of the room. In the holo wall, high-shouldered wildebeest were leaping off a cliff to swim across a river. One stumbled, toppled, vanished under the rapid water. We watched in dismal silence till Casey turned to frown at Pepe and me.

"I don't think I like the nanorob way."

We had begun to understand why Sandor had no place on Earth for us.

6.

"Dear sirs, I must beg you to excuse us."

Tling made a careful little bow and explained that her mother was taking her to dance and music practice, then going on to a meeting about the people on the stranded ship. We were left alone with the robots.

They were man-shaped, ivory-colored, blank-faced. Lacking nanorobs, they were voice-controlled.

Casey tried to question them about the population, cities, and industries of the new Earth, but they had been programmed only for domestic service, with no English or information about anything else. Defeated by their blank-lensed stares, we sat out on the terrace, looking down across the memorial and contemplating our own uncertain future, till they called us in for dinner.

The dishes they served us were strange, but Pepe urged us to eat while we could.

"Manana?"He shook his head uneasily."Quien sabe?"

Night was falling before we got back to the terrace. A thin Moon was setting in the west. In the east, a locomotive headlight flashed across the memorial. The mall was lit for evening tours, the Taj Mahal a glowing gem, the Great Pyramid an ivory island in the creeping dusk. The robots had our beds ready when the light went out. They had served wine with dinner, and I slept without a dream.

Awake early next morning, rested again and lifted with unreasonable hope, I found Tling standing outside at the end of the terrace, looking down across the valley. She had hair like her mother's, not feathers or fur, but blonde and cropped short. Despite the awesome power of her nanorobs, I thought she looked very small and vulnerable. She started when I spoke."Good morning, Mr. Dunk." She wiped at her face with the back of her hand and tried to smile. I saw that her eyes were puffy and red. "How is your ankle?"

"Better."

"I was worried." She found a pale smile. "Because you have no symbiotes to help repair such injuries."

I asked if she had heard from her father and the emigrant ship. She turned silently to look again across the sunlit valley and the memorial. I saw the far plume of steam from an early train crawling over the bridge toward the Sphinx.

"I watched a baby giraffe." Her voice was slow and faint, almost as if she was speaking to herself. "I saw it born. I watched it learning to stand, nuzzling its mother, learning to suck. It finally followed her away, wobbling on its legs. It was beautiful-"

Her voice failed. Her hand darted to her lips. She stood trembling, staring at me, her eyes wide and dark with pain.

"My father!" Her voice came suddenly sharp and thin, almost a scream. "He's going away. I'll never see him again."

She ran back inside.

When the robots called us to breakfast, we found her sitting between her parents. She had washed her tear-streaked face, but the food on her plate had not been touched. Here out of the Sun, Sandor's face had gone pale and grim. He seemed not to see us till Tling turned to frown at him. He rose then, and came around the table to shake our hands.

"Good morning, Dr. Pen." Casey gave him a wry smile. "I see why you didn't want us here, but I can't apologize. We'll never be sorry we came."

"Sit down." He spoke shortly. "Let's eat."

We sat. The robots brought us plates loaded with foods we had never tasted. Saying no more to us, Sandor signaled a robot to refill his cup of the bitter black tea and bent over a bowl of crimson berries.

Tling sat looking up at him in anguished devotion till Casey spoke.

"Sir, we heard about your problem with the stranded colonists. Can you tell us why their ship came back?"

"Nothing anybody understands." He shook his head and gave Tling a tender smile before he pushed the berries aside and turned gravely back to us. His voice was quick and crisp. "The initial survey expedition had found their destination planet quite habitable and seeded it with terran-type life. Expeditions had followed to settle the three major continents. This group was to find room on the third.

"They arrived safe but got no answer when they called the planet from orbit. The atmosphere was hazed with dust that obscured the surface, but a search in the infrared found relics of a very successful occupation. Pavements, bridges, masonry, steel skeletons that had been buildings. All half buried under dunes of red, windblown dust. No green life anywhere. A derelict craft from one of the pioneer expeditions was still in orbit, but dead as the planet.

"They never learned what killed the planet. No news of the disaster seems to have reached any otherworld, which suggests that it struck unexpectedly and spread fast. The medical officers believe the killer may have been some unknown organism that attacks organic life, but the captain refused to allow any attempt to land or investigate. She elected to turn back at once, without contact. A choice that probably saved their lives."

He picked up his spoon and bent again to his bowl of berries. I tried one of them. It was tart, sweet, with a heady tang I can't describe.

"Sir," Casey spoke again, "we saw those people. They're desperate. What will happen to them now?"

"A dilemma." Sandor looked at Tling, with a sad little shrug. She turned her head to hide a sob.

"Habitable planets are relatively rare. The few we find must be surveyed, terraformed, approved for settlement. As events came out, these people have been fortunate. We were able to get an emergency waiver that will allow them to settle on an open planet, five hundred light-years in toward the core. Fuel and fresh supplies are being loaded now."

"And my father-" Tling looked up at me, her voice almost a wail. "He has to go with them. All because of me."

He put his arm around her and bent his face to hers. Whatever he said was silent. She climbed into his arms. He hugged her, rocking her back and forth like a baby, till her weeping ceased. With a smile that broke my heart, she kissed him and slid out of his arms.

"Excuse us, please." Her voice quivering, she caught his hand. "We must say good-bye."

She led him out of the room.

Lo stared silently after them till Pepe tapped his bowl to signal the robots for a second serving of the crimson berries.

"It's true." With a long sigh, she turned back to us. "A painful thing for Tling. For all three of us. This is not what we planned."

Absently, she took a little brown cake from a tray the robot was pa.s.sing and laid it on her plate, untasted.

"Que tienes?"Pepe gave her a puzzled look.

"We hoped to stay together," she said. "Sandor and I have worked here for most of the century, excavating the site and restoring what we could. With that finished, I wanted to see my homeworld again.

We were going back there together, Tling with us. Taking the history we had learned, we were planning to replicate the memorial there."

Bleakly, she shook her head.

"This changes everything. Sandor feels a duty to help the colonists find a home. Tling begged him to take us with him, but-" She shrugged in resignation, her lips drawn tight. "He's afraid of whatever killed Enthel Two. And there's something else. His brother-"

She looked away for a moment.

"He has a twin brother. His father had to emigrate when they were born. He took the twin. His motherhad a career in nanorob genetics she couldn't leave. Sandor stayed here with her, longing for his twin. He left when he was grown, searched a dozen worlds, never found him. He did find me. That's the happy side."

Her brief smile faded.

"A hopeless quest, I've told him. There are too many worlds, too many light-years. Slider flights may seem quick, but they take too long. Yet he can't give up the dream."

"Can we-" Casey checked himself to look at Pepe and me. We nodded, and he turned anxiously back to Lo. "If Sandor does go out on the emigrant ship, would he take us with him?"

She shook her head and sat staring at nothing till Pepe asked, "Por que no?"

"Reasons enough." Frowning, she picked up the little brown cake, broke it in half, dropped the fragments back on her plate. "First of all, the danger. Whatever killed that planet could kill another. He got the waiver, in fact, because others were afraid to go. The colonists had no choice, but he doesn't want to kill you."

"It's our choice." Casey shrugged. "When you have to jump across hundreds of years of s.p.a.ce and time, don't you always take a risk?"

"Not like this one." She shrugged unhappily. "Enthel Two is toward the galactic core. So is this new one.

If the killer is coming from the core-"

Pale face set, she shook her fair-haired head.

"We'll take the risk." Casey glanced again at us and gave her a stiff little grin. "You might remind him that we weren't cloned to live forever. He has more at stake than we do."

Her body stiffened, fading slowly white.