The Ringworld Throne

The hologram view streamed past him. Distant trees flashed past, an extensive forest of what looked like pines. Dead ahead, mountains and cloud patterns seemed infinitely distant.

The Hindmost could hide anything in the captain’s cabin, and his crew would see nothing but this bounding, lurching hologram projection. Maybe that was the point.

The bouncing lower rim was dark wood: the front of an alcohol-burning Machine People cruiser. Under that, a bit of a curved rim of gleaming metal or plastic.

The webeye camera that the Ghouls had mounted on a Machine People cruiser now rode something that flew.

Blocks of rock protruded from fringes of forest. The vehicle flew no more than two hundred feet up. The speed? Subsonic, but not by much.

What kind of hominids could tolerate such speed? Louis wondered. Even Disney Port didn’t run rides this fast. Most Ringworld hominids would die if they merely traveled beyond their local ecologies. A ride like this would stop their hearts.

What was he supposed to do with this?

How much time did he have to play?

Trapped in a bungalow-sized box buried miles deep in cooled lava, he was hardly a free agent. Stepping disks would get him out, but they would only take him to where his masters waited.

Louis knew that he was reacting instead of acting, like a good dog trying to guess the will of his masters. He was seething with new youth, and he couldn’t do anything.

Sit down, he told himself. Relax. Distract yourself. Eat?

The kitchen menu was ru

Using the stepping disk would lose him his options.

Examining the stepping disk …

He lifted the rim as he’d seen Bram do.

The racing landscape blinked out, replaced by an abstraction: the diagram of the stepping disk network.

More links had been added. Several networks had merged into one. The restricted flick from crew quarters to the captain’s cabin was still isolated, and so were a few other pairs. Still, the Hindmost had given up some security for greater convenience. Bram must have made him do that.

The diagram measured distance on a logarithmic scale. At and near Needle, detail was fine enough to discriminate between crew quarters and the lander bay. There were flick points all through the Repair Center. Louis picked out Weaver Town, hundreds of thousands of miles distant. One point was far to starboard of Needle’s position, almost to the rim wall, half a million miles away or more. The most distant point must be a third of the way around the Ringworld’s arc: hundreds of millions of miles.

Brighter lines would indicate links that were currently open. If he was reading this right … open circuits ran from Needle’s crew quarters to Needle’s lander bay to the far point on the Great Ocean. Bram must be exploring.

Had he taken the Hindmost? Or had the Hindmost returned to his cabin?

Knowing that, Louis thought, would tell him exactly how much trust was between the Hindmost and Bram. In his cabin the Hindmost would be next to invulnerable, with General Products hull material between him and any enemy. Locked off from his grooming aids, he would grow scruffy and uncomfortable—

Ding. French toast with maple syrup. Coffee with foamy steamed milk appeared a moment later. Louis ate rapidly.

Then he tried using the fork on the stepping disk controls.

The tines bent and broke.

Humming, Louis dialed {Earth, Japan, assorted sashimi}.

The hashi felt like wood. They even had a grain. He cracked one along the grain to get a point. He began moving whatever would move in the stepping disk controls.

Bright lines faded, others brightened, as links opened and closed.

A slide turned everything off. Moving the slide back the way it had come got him a blinking half brightness: the system wanted instructions.

He kept playing. Presently he had a bent ring of seven bright lines, and a virtual clock, and weird music playing in the background. He couldn’t understand the musical puppeteer language, and he couldn’t read a Fleet of Worlds timepiece, but he saw how to set it for fast.

If he’d read this right, the circuit would take him to the lander bay; then to Weaver Town, to see what had changed. Pick up a pressure suit in the lock, or else he’d be sniffing tree-of-life when he flicked to the Meteor Defense room! Keep the suit on when he flicked to the surface of the Map of Mars, and thence to the farthest point on the diagram, which seemed to be on the rim wall. On to the mystery point at the far shore of the Great Ocean, and back to Needle.

Second thoughts? This shouldn’t take him more than a few minutes, unless he found something interesting.

He set the sashimi plate on the stepping disk.

Nothing happened.

Of course not: the rim of the stepping disk was still lifted, exposing the controls. Louis pushed it down. The sashimi plate flicked out.

The network blinked out, too. Louis had to shy from sudden motion. The racing landscape was back, and mountains beyond, spill mountains with the rim wall as backdrop. They were nearby, by Ringworld measure, a few tens of thousands of miles away.

Louis thought of matters he would like to study, if he could access the ship’s computer. He’d have to ask the Hindmost later. He must review what was known of protectors. Where was that sashimi plate?

Ru

Forty-five minutes later the plate hadn’t come back.

His companions might be at one of these points—probably were—and Acolyte might have snatched the sashimi. Still: rethink.

The far point in the diagram had drifted a little.

Drifted a little, yeah. Louis’s windpipe closed up; he was wheezing. Two hundred million miles up the Arch as measured on a logarithmic scale, and drifting? That point had to be moving like an interstellar slowboat, at hundreds of miles per second.

It was the refueling probe, of course. They must have mounted a new stepping disk on its flank and set it orbiting along the rim wall. As for the sashimi plate, it must have burned as a meteor.

Louis pulled the disk up to expose the controls. He began to reset them, swearing and talking himself through it, trying to ignore the orchestra. “Now this should reset that link … tanj. Why not? Oh. Stet, dark means off, now try this …”

He dialed up a loaf of bread and set it on the stepping disk. Flick.

An hour and ten since he had cut his associates off from Needle. He’d cut them off from the entire Repair Center, come to that. It would be open war when they discovered that, and breach of contract, too.

Then again, what could they do about it?

The chuckle never reached his throat. Louis knew puppeteers. The Hindmost would have had auxiliary controls implanted surgically. Louis knew he should be wondering when to reset the stepping disks. The Hindmost might tolerate his fiddling, but Louis didn’t want to face Bram’s wrath.

The bread was back.

The cruiser was flying over water. The mountains were to its left now, drifting minutely to spinward. The platform must have turned … turned by sixty degrees. Louis let a slow grin form.

It was following the superconductor grid!

Superconducting cable lay as a substrate beneath the Ringworld floor, forming hexagons fifty thousand miles across. It guided the magnetic fields by which solar prominences could be manipulated. Evidently the cruiser was riding a magnetic levitation vehicle, possibly something worked up by City Builders, more likely something as old as the Ringworld itself.