Crouched in the ancient doorway like an animal peering out from his burrow, Mr. Michaelson saw the native.

At first he was startled, thinking it might be someone else from the Earth settlement who had discovered the old city before him. Then he saw the glint of sun against the metallic skirt, and relaxed.

He chuckled to himself, wondering with amusement what a webfooted man was doing in an old dead city so far from his people. Some facts were known about the people of Alpha Centaurus II. They were not actually natives, he recalled. They were a colony from the fifth planet of the system. They were a curious people. Some were highly intelligent, though uneducated.

He decided to ignore the man for the moment. He was far down the ancient street, a mere speck against the sand. There would be plenty of time to wonder about him.

He gazed out from his position at the complex variety of buildings before him. Some were small, obviously homes. Others were huge with tall, frail spires standing against the pale blue sky. Square buildings, ellipsoid, spheroid. Beautiful, dream-stuff bridges connected tall, conical towers, bridges that still swung in the wind after half a million years. Late afternoon sunlight shone against ebony surfaces. The sands of many centuries had blown down the wide streets and filled the doorways. Desert plants grew from roofs of smaller buildings.

Ignoring the native, Mr. Michaelson poked about among the ruins happily, exclaiming to himself about some particular artifact, marveling at its state of preservation, holding it this way and that to catch the late afternoon sun, smiling, clucking gleefully. He crawled over the rubble through old doorways half filled with the accumulation of ages. He dug experimentally in the sand with his hands, like a dog, under a roof that had weathered half a million years of rain and sun. Then he crawled out again, covered with dust and cobwebs.

The native stood in the street less than a hundred feet away, waving his arms madly. “Mr. Earthgod,” he cried. “It is sacred ground where you are trespassing!”

The archeologist smiled, watching the man hurry closer. He was short, even for a native. Long gray hair hung to his shoulders, bobbing up and down as he walked. He wore no shoes. The toes of his webbed feet dragged in the sand, making a deep trail behind him. He was an old man.

“You never told us about this old dead city,” Michaelson said, chidingly. “Shame on you. But never mind. I’ve found it now. Isn’t it beautiful?”

“Yes, beautiful. You will leave now.”

“Leave?” Michaelson asked, acting surprised as if the man were a child. “I just got here a few hours ago.”

“You must go.”

“Why? Who are you?”

“I am keeper of the city.”

“You?” Michaelson laughed. Then, seeing how serious the native was, said, “What makes you think a dead city needs a keeper?”

“The spirits may return.”

Michaelson crawled out of the doorway and stood up. He brushed his trousers. He pointed. “See that wall? Built of some metal, I’d say, some alloy impervious to rust and wear.”

“The spirits are angry.”

“Notice the inscriptions? Wind has blown sand against them for eons, and rain and sleet. But their story is there, once we decipher it.”

“Leave!”

The native’s lined, weathered old face was working around the mouth in anger. Michaelson was almost sorry he had mocked him. He was deadly serious.

“Look,” he said. “No spirits are ever coming back here. Don’t you know that? And even if they did, spirits care nothing for old cities half covered with sand and dirt.”

He walked away from the old man, heading for another building. The sun had already gone below the horizon, coloring the high clouds. He glanced backward. The webfoot was following.

“Mr. Earthgod!” the webfoot cried, so sharply that Michaelson stopped. “You must not touch, not walk upon, not handle. Your step may destroy the home of some ancient spirit. Your breath may cause one iota of change and a spirit may lose his way in the darkness. Go quickly now, or be killed.”

He turned and walked off, not looking back.

Michaelson stood in the ancient street, tall, gaunt, feet planted wide, hands in pockets, watching the webfoot until he was out of sight beyond a huge circular building. There was a man to watch. There was one of the intelligent ones. One look into the alert old eyes had told him that.

Michaelson shook his head, and went about satisfying his curiosity. He entered buildings without thought of roofs falling in, or decayed floors dropping from under his weight. He began to collect small items, making a pile of them in the street. An ancient bowl, metal untouched by the ages. A statue of a man, one foot high, correct to the minutest detail, showing how identical they had been to Earthmen. He found books still standing on ancient shelves but was afraid to touch them without tools.

Darkness came swiftly and he was forced out into the street.

He stood there alone feeling the age of the place. Even the smell of age was in the air. Silver moonlight from the two moons filtered through clear air down upon the ruins. The city lay now in darkness, dead and still, waiting for morning so it could lie dead and still in the sun.

There was no hurry to be going home, although he was alone, although this was Alpha Centaurus II with many unknowns, many dangers ... although home was a very great distance away. There was no one back there to worry about him.

His wife had died many years ago back on Earth. No children. His friends in the settlement would not look for him for another day at least. Anyway, the tiny cylinder, buried in flesh behind his ear, a thing of mystery and immense power, could take him home instantly, without effort save a flicker of thought.

“You did not leave, as I asked you.”

Michaelson whirled around at the sound of the native’s voice. Then he relaxed. He said, “You shouldn’t sneak up on a man like that.”

“You must leave, or I will be forced to kill you. I do not want to kill you, but if I must...” He made a clucking sound deep in the throat. “The spirits are angry.”

“Nonsense. Superstition! But never mind. You have been here longer than I. Tell me, what are those instruments in the rooms? It looks like a clock but I’m certain it had some other function.”

“What rooms?”

“Oh, come now. The small rooms back there. Look like they were bedrooms.”

“I do not know.” The webfoot drew closer. Michaelson decided he was sixty or seventy years old, at least.

“You’ve been here a long time. You are intelligent, and you must be educated, the way you talk. That gadget looks like a time-piece of some sort. What is it? What does it measure?”

“I insist that you go.” The webfoot held something in his hand.

“No.” Michaelson looked off down the street, trying to ignore the native, trying to feel the life of the city as it might have been.

“You are sensitive,” the native said in his ear. “It takes a sensitive god to feel the spirits moving in the houses and walking in these old streets.”

“Say it any way you want to. This is the most fascinating thing I’ve ever seen. The Inca’s treasure, the ruins of Pompeii, Egyptian tombs--none can hold a candle to this.”

“Mr. Earthgod...”

“Don’t call me that. I’m not a god, and you know it.”

The old man shrugged. “It is not an item worthy of dispute. Those names you mention, are they the names of gods?”

He chuckled. “In a way, yes. What is your name?”

“Maota.”

“You must help me, Maota. These things must be preserved. We’ll build a museum, right here in the street. No, over there on the hill just outside the city. We’ll collect all the old writings and perhaps we may decipher them. Think of it, Maota! To read pages written so long ago and think their thoughts. We’ll put everything under glass. Build and evacuate chambers to stop the decay. Catalogue, itemize...”

Michaelson was warming up to his subject, but Maota shook his head like a waving palm frond and stamped his feet.

“You will leave now.”

“Can’t you see? Look at the decay. These things are priceless. They must be preserved. Future generations will thank us.”

“Do you mean,” the old man asked, aghast, “that you want others to come here? You know the city abhors the sound of alien voices. Those who lived here may return one day! They must not find their city packaged and preserved and laid out on shelves for the curious to breathe their foul breaths upon. You will leave. Now!”

“No.” Michaelson was adamant. The rock of Gibraltar.

Maota hit him, quickly, passionately, and dropped the weapon beside his body. He turned swiftly, making a swirling mark in the sand with his heel, and walked off toward the hills outside the city.

The weapon he had used was an ancient book. Its paper-thin pages rustled in the wind as if an unseen hand turned them, reading, while Michaelson’s blood trickled out from the head wound upon the ancient street.

When he regained consciousness the two moons, bright sentinel orbs in the night sky, had moved to a new position down their sliding path. Old Maota’s absence took some of the weirdness and fantasy away. It seemed a more practical place now.

The gash in his head was painful, throbbing with quick, short hammer-blows synchronized with his heart beats. But there was a new determination in him. If it was a fight that the old webfooted fool wanted, a fight he would get. The cylinder flicked him, at his command, across five hundred miles of desert and rocks to a small creek he remembered. Here he bathed his head in cool water until all the caked blood was dissolved from his hair. Feeling better, he went back.

The wind had turned cool. Michaelson shivered, wishing he had brought a coat. The city was absolutely still except for small gusts of wind sighing through the frail spires. The ancient book still lay in the sand beside the dark spot of blood. He stooped over and picked it up.

It was light, much lighter than most Earth books. He ran a hand over the binding. Smooth it was, untouched by time or climate. He squinted at the pages, tilting the book to catch the bright moonlight, but the writing was alien. He touched the page, ran his forefinger over the writing.

Suddenly he sprang back. The book fell from his hands.

“God in heaven!” he exclaimed.

He had heard a voice. He looked around at the old buildings, down the length of the ancient street. Something strange about the voice. Not Maota. Not his tones. Not his words. Satisfied that no one was near, he stooped and picked up the book again.

“Good God!” he said aloud. It was the book talking. His fingers had touched the writing again. It was not a voice, exactly, but a stirring in his mind, like a strange language heard for the first time.

A talking book. What other surprises were in the city? Tall, fragile buildings laughing at time and weather. A clock measuring God-knows-what. If such wonders remained, what about those already destroyed? One could only guess at the machines, the gadgets, the artistry already decayed and blown away to mix forever with the sand.

I must preserve it, he thought, whether Maota likes it or not. They say these people lived half a million years ago. A long time. Let’s see, now. A man lives one hundred years on the average. Five thousand lifetimes.

And all you do is touch a book, and a voice jumps across all those years!

He started off toward the tall building he had examined upon discovery of the city. His left eyelid began to twitch and he laid his forefinger against the eye, pressing until it stopped. Then he stooped and entered the building. He laid the book down and tried to take the “clock” off the wall. It was dark in the building and his fingers felt along the wall, looking for it. Then he touched it. His fingers moved over its smooth surface. Then suddenly he jerked his hand back with an exclamation of amazement. Fear ran up his spine.

The clock was warm.

He felt like running, like flicking back to the settlement where there were people and familiar voices, for here was a thing that should not be. Half a million years--and here was warmth!

He touched it again, curiosity overwhelming his fear. It was warm. No mistake. And there was a faint vibration, a suggestion of power. He stood there in the darkness staring off into the darkness, trembling. Fear built up in him until it was a monstrous thing, drowning reason. He forgot the power of the cylinder behind his ear. He scrambled through the doorway. He got up and ran down the ancient sandy street until he came to the edge of the city. Here he stopped, gasping for air, feeling the pain throb in his head.

Common sense said that he should go home, that nothing worthwhile could be accomplished at night, that he was tired, that he was weak from loss of blood and fright and running. But when Michaelson was on the trail of important discoveries he had no common sense.

He sat down in the darkness, meaning to rest a moment.

When he awoke dawn was red against thin clouds in the east.

Old Maota stood in the street with webbed feet planted far apart in the sand, a weapon in the crook of his arm. It was a long tube affair, familiar to Michaelson.

Michaelson asked, “Did you sleep well?”

“No.”

“I’m sorry to hear that.”

“How do you feel?”

“Fine, but my head aches a little.”

“Sorry,” Maota said.

“For what?”

“For hitting you. Pain is not for gods like you.”

Michaelson relaxed somewhat. “What kind of man are you? First you try to break my skull, then you apologize.”

“I abhor pain. I should have killed you outright.”

He thought about that for a moment, eyeing the weapon.

It looked in good working order. Slim and shiny and innocent, it looked like a glorified African blowgun. But he was not deceived by its appearance. It was a deadly weapon.

“Well,” he said, “before you kill me, tell me about the book.” He held it up for Maota to see.

“What about the book?”

“What kind of book is it?”

“What does Mr. Earthgod mean, what kind of book? You have seen it. It is like any other book, except for the material and the fact that it talks.”