"I don't care about rights," Mitch snapped. "I'm talking about what's sensible, sane. But nobody's got the right to be stupid."

Ferris stiffened. "Watch your tongue, smart boy."

"I didn't ask for this conversation."

Ferris released the handlebars. "Get off the bicycle," he grunted ominously.

"Why? You want to settle it the hard way?"

"No. We're requisitioning your bicycle. You can walk from here on. The Sugarton crowd needs transportation. We need good men, but I guess you ain't one. Start walking."

Mitch hesitated briefly. Then he shrugged and dismounted on the side away from Ferris. The big man held the shotgun cradled lazily across one forearm. He watched Mitch with a mocking grin.

Mitch grasped the handlebars tightly and suddenly rammed the front wheel between Ferris's legs. The fender made a tearing sound. The shotgun exploded skyward as the big man fell back. He sat down screaming and doubling over. The gun clattered into the road. He groped for it with a frenzied hand. Mitch kicked him in the face and a tooth slashed at his toe through the boot leather. Ferris fell aside, his mouth spitting blood and white fragments.

Mitch retrieved the shotgun and helped himself to a dozen shells from the other's pockets, then mounted the bicycle and pedaled away. When he had gone half a mile, a rifle slug spanged off the pavement beside him. Looking back, he saw three tiny figures standing beside Ferris in the distance. The "Sugarton crowd" had come to take care of their own, no doubt. He pedaled hard to get out of range, but they wasted no more ammunition.

He realized uneasily that he might meet them again if they came to the city intending to sabotage Central. And Ferris wouldn't miss a chance to kill him, if the chance came. Mitch didn't believe he was really hurt, but he was badly humiliated. And for some time to come he would dream of pleasant ways to murder Mitch Laskell.

Mitch no longer whistled as he rode along the deserted highway toward the sun-drenched skyline in the distance. To a man born and bred to the tune of mechanical thunder, amid vistas of concrete and steel, the skyline looked good-looked good even with several of the buildings twisted into ugly wreckage. It had been dusted in the radiological attack, but not badly bombed. Its defenses had been more than adequately provided for-which was understandable, since it was the capital and the legislators appropriated freely.

It seemed unreasonable to him that Central was still working. Why hadn't some group of engineers made their way into the main power vaults to kill the circuits temporarily? Then he remembered that the vaults were self-defending and that there were probably very few technicians left who knew how to handle the job. Technicians had a way of inhabiting industrial regions, and wars had a way of destroying those regions. Dirt farmers usually had the best survival value.

Mitch had been working with aircraft computers before he became displaced, but a city's Central Service Coordinator was a far cry from a robot pilot. Centrals weren't built all at once; they grew over a period of years. At first, small units were set up in power plants and waterworks to regulate voltages and flows and circuit conditions automatically. Small units replaced switchboards in telephone exchanges. Small computers measured traffic flow and regulated lights and speed limits accordingly. Small computers handled bookkeeping where large amounts of money were exchanged. A computer checked books in and out at the library, also assessing the fines. Computers operated the city buses and eventually drove most of the routine traffic.

That was the way the city's Central Service grew. As more computers were assigned to various tasks, engineers were hired to coordinate them, to link them with special circuits and to set up central "data tanks," so that a traffic regulator in the north end would be aware of traffic conditions in the main thoroughfares to the south. Then, when the micro-learner relay was invented, the engineers built a central unit to be used in conjunction with the central data tanks. With the learning units in operation, Central was able to perform most of the city's routine tasks without attention from human supervisors.

The system had worked well. Apparently it was still working well three years after the inhabitants had fled before the chatter of the Geiger counters. In one sense Ferris had been right: A city whose machines carried on as if nothing had happened-that city might be a dangerous place for a lone wanderer.

But dynamite certainly wasn't the answer, Mitch thought. Most of man's machinery was already wrecked or lying idle. Humanity had waited a hundred thousand years before deciding to build a technological civilization. If it wrecked this one completely, it might never build another.

Some men thought that a return to the soil was desirable. Some men tried to pin their guilt on the machines, to lay their own stupidity on the head of a mechanical scapegoat and absolve themselves with dynamite. But Mitch Laskell was a man who liked the feel of a wrench and a soldering iron-liked it better than the feel of even the most well-balanced stone ax or wooden plow. And he liked the purr of a pint-sized nuclear engine much better than the braying of a harnessed jackass.

He was willing to kill Frank Ferris or any other man who sought to wreck what little remained. But gloom settled over him as he thought, "If everybody decides to tear it down, what can I do to stop it?" For that matter, would he then be right in trying to stop it?

At sundown he came to the limits of the city, and he stopped just short of the outskirts. Three blocks away a robot cop rolled about in the center of the intersection, rolled on tricycle wheels while he directed the thin trickle of traffic with candy-striped arms and with "eyes" that changed color like a stoplight. His body was like an oil drum, painted fire-engine red. The head, however, had been cast in a human mold, with a remarkably Irish face and a perpetual predatory smile. A short radar antenna grew from the center of his head, and the radar was his link with Central.

Mitch sat watching him with a nostalgic smile, even though he knew such cops might give him considerable trouble once he entered the city. The "skaters" were incapable of winking at petty violations of ordinance.

As the daylight faded, photronic cells notified Central, and the streetlights winked on promptly. A moment later, a car without a taillight whisked by the policeman's corner. A siren wailed in the policeman's belly. He skated away in hot pursuit, charging like a mechanical bull. The car screeched to a stop. "O'Reilly" wrote out a ticket and offered it to any empty back seat. When no one took it, the cop fed it into a slot in his belly, memorized the car's license number, and came clattering back to his intersection, where the traffic had automatically begun obeying the ordinances governing nonpoliced intersections.

The cars were empty, computer-piloted. Their destinations were the same as when they had driven regular daily routes for human passengers: salesmen calling on regular customers, inspectors making their rounds, taxis prowling their assigned service areas.

Mitch Laskell stood shivering. The city sounded sleepy but alive. The city moved and grumbled. But as far as he could see down the wide boulevard, no human figure was visible. The city was depopulated: There was a Geiger on a nearby lamppost. It clucked idly through a loudspeaker. But it indicated no danger. The city should be radiologically safe.

But after staring for a long time at the weirdly active streets, Mitch muttered, "It'll wait for tomorrow."

He turned onto a side road that led through a residential district just outside the city limits. Central's jurisdiction did not extend here, except for providing water and lights. He meant to spend the night in a deserted house, then enter the city at dawn.