The Ringworld Engineers

looking down on the floating city. “Us,” he said.

“I’ve seen that. Tell me about the vampires.”

Louis hesitated. But after all, the boy’s species were this world’s experts at interspecies sex. “They can make you want to do rishathra with them. When you do, you get bitten on the neck.” He showed the boy the healed wound in his throat. “Chmeee killed the vampire that, uh, attacked me.”

“Why didn’t the vampires get him?”

“Chmeee’s like nothing in the world. He’s as likely to be seduced by a sausage plant.”

“We make perfume from vampires,” the boy said.

“What?” Something wrong with the translator?

The boy smiled too wisely. “One day you’ll see. I’ve got to go. Will you be here later?”

Louis nodded.

“What’s your name? Mine’s Kawaresksenjajok.”

“Luweewu.”

The boy left by the stairwell. Louis stood frowning at the screen.

Perfume? The smell of vampires in Panth Building… and now Louis remembered the night Halrloprillalar came to his bed, twenty-three years ago. She’d been trying to control him. She’d said so. Had she used vampire scent on him?

It couldn’t matter now. “Calling the Hindmost,” he said. “Calling the Hindmost.”

Nothing.

The screen wasn’t built to swivel. It faced always outward, away from the shadow squares. Annoying but informative: it could mean that the pictures were being beamed from the shadow squares themselves.

He reduced the scale on the screen. He sent the viewpoint swooping to spinward at impossible speed until he was looking down on a world of water. He dropped like an angel in a death dive. This was fun. The Library’s facilities were considerably better than Needle’s telescope.

The Map of Earth was old. Half a million years had distorted the continents. Or more? A million? Two? A geologist would have known.

Louis shifted to starboard of antispinward until the Map of Kzin filled the screen: islands clustered around a plate of glare ice. And how old was this Map’s togography? Chmeee might know.

Louis expanded the view. He hummed as he worked. He skimmed above yellow-and-orange jungle. His view crossed a broad silver band of river, and he followed it toward the sea. At the junctures of rivers there ought to be cities.

He almost skimmed past it. A delta where two rivers joined; a pale grid pattern imposed on jungle colors. Some human cities had “green belts,” but in this kzinti city they must cover more territory than the buildings. At maximum magnification Louis could just make out patterns of streets.

The kzinti had never liked big cities. Their sense of smell was too acute. This city was almost as big as the Patriarch’s seat of government on Kzin.

They had cities. What else? If they had any kind of industry, they’d need… seaports? Mining towns? Keep skimming.

Here the jungle was scrawny. The yellow-brown of barren soil showed through in a pattern that wasn’t city-shaped at all. It looked like a melted archery target. At a guess, it was a very large and very old strip mine.

Half a million years ago, or more, a sampling of kzinti had been dropped here. Louis didn’t expect to find mining towns. They’d be lucky to have anything left to mine. For half a million years they had been confined to one world, a world whose surface ended a few hundred feet down. But it seemed the kzinti had kept their civilization.

They had brains, these near-cats. They had ruled a respectable interstellar civilization. Tanj, it was kzinti who had taught humans to use gravity generators! And Chmeee must have reached the Map of Kzin hours ago, in his search for allies against the Hindmost.

Louis had followed the river to the sea. Now he skimmed his god’s-eye view “south” along the shoreline of the Map’s largest continent. He expected ports, though the kzinti didn’t use ships much. They didn’t like the sea. Their seaports were industrial cities; nobody lived there for pleasure.

But that was in the Kzinti Empire, where gravity generators had been used for millennia. Louis found himself looking down on a seaport that would have rivalled New York harbor. It crawled with the wakes of ships barely large enough to see. The harbor had the nearly circular look of a meteor crater.

Louis lowered the magnification, backing his viewpoint into the sky, to get an overview.

He blinked. Had his miserable sense of scale betrayed him again? Or had he mishandled the controls?

There was a ship moored across the harbor. It made the harbor look bathtub-sized.

The wakes of tinier ships were still there. It was real, then. He was looking at a ship as big as a town. It nearly closed off the arc of the natural harbor.

They wouldn’t move it often, Louis thought. The motors would chew up the sea bed something fierce. With the ship gone, the harbor’s wave patterns would change. And how would the kzinti fuel something so big? How had they fueled it the first time? Where did they find the metals?

Why?

Louis had never seriously wondered if Chmeee would find what he sought on the Map of Kzin. Not until now.

He spun the magnification dial. His viewpoint receded into space until the Map of Kzin was a cluster of specks on a vast blue sea. Other Maps showed near the edges of the screen.

The nearest Map to the Map of Kzin was a round pink dot. Mars… and it was as far from Kzin as the Moon was from Earth.

How could such distances be conquered? Even a telescope wouldn’t penetrate more than two hundred thousand miles of atmosphere. The idea of crossing that distance in a seagoing ship — even a ship the size of a small city — tanj!

“Calling the Hindmost. Louis Wu calling the Hindmost.” Time was running out for Louis Wu as repairmen moved in on Needle and Chmeee culled the Map of Kzin for warriors. Louis didn’t intend to mention any of this to the Hindmost. It would only upset the puppeteer.

What was the Hindmost doing that he couldn’t answer a call?

Could a human even guess at the answer?

Continue the survey, then.

Louis ran the scale down until he could see both rim walls. He looked for Fist-of-God Mountain near the Ringworld’s median line, to port of the Great Ocean. Not there. He expanded the scale. A patch of desert bigger than the Earth was still small against the Ringworld, but there it was, reddish and barren, and the pale dot near the center was… Fist-of-God, a thousand miles tall, capped with naked scrith.

He skimmed to port, tracing the path they had taken following Liar’s crash. Long before he was ready, he had reached water, a wide-flung arm of the Great Ocean. They had stopped within sight of that bay. Louis drifted back, looking for what would be an oblong of permanent cloud, seen from above.

But the eye storm wasn’t there.

“Calling the Hindmost! In the names of Kdapt and Finagle and Allah I summon thee, God tanj it! Calling —”

“I am here, Louis.”

“Okay! I’m in a library in the floating city. They’ve got a map room. Look up Nessus’s records of the map room we—”

“I remember,” the puppeteer said coolly.

“Well, that map room showed old tapes. This one is running on present time!”

“Are you safe?”

“Safe? Oh, safe enough. I’ve been using superconductor cloth to make friends and influence people. But I’m trapped here. Even if I could bribe my way out of the city, I’d still have to get past the Machine People station on Sky Hill. I’d rather not shoot my way out.”

“Wise.”

“What’s new at your end?”