Next to him, Dr. DeWinter was also deep in thought. He appreciated the intricate workmanship, by engineers stationed on the third planet, which had gone into the simulacrum resting in the box on Milt Biskle's lap. The technical achievement was impressive, even to him, and he saw clearly – as Milt Biskle of course did not. This artifact, accepted by the Terran as an authentic organism from his familiar past, would provide a pivot by which the man would hang onto his psychic balance.

But what about the other reconstruct engineers? What would carry each of them through and past the moment of discovery as each completed his work and had to – whether he liked it or not – awake?

It would vary from Terran to Terran. A dog for one, a more elaborate simulacrum, possibly that of a nubile human female, for another. In any case each would be provided with an "exception" to the true state. One essential surviving entity, selected out of what had in fact totally vanished. Research into the past of each engineer would provide the clue, as it had in Biskle's instance; the cat-simulacrum had been finished weeks before his abrupt, panic-stricken trip home to Terra. For instance, in Andre's case a parrot-simulacrum was already under construction. It would be done by the time he made his trip home.

"I call him Thunder," Milt Biskle explained.

"Good name," Dr. DeWinter – as he titled himself these days – said. And thought, A shame we could not have shown him the real situation of Terra. Actually it's quite interesting that he accepted what he saw, because on some level he must realize that nothing survives a war of the kind we conducted. Obviously he desperately wanted to believe that a remnant, even though no more than rubble, endures. But it's typical of the Terran mind to fasten onto phantoms. That might help explain their defeat in the conflict; they were simply not realists.

"This cat," Milt Biskle said, "is going to be a mighty hunter of Martian sneak-mice."

"Right," Dr. DeWinter agreed, and thought, As long as its batteries don't run down. He, too, patted the kitten.

A switch closed and the kitten purred louder.

Retreat Syndrome

Peace Officer Caleb Myers picked up the fast-moving surface vehicle on his radarscope, saw at once that its operator had managed to remove the governor; the vehicle, at one-sixty miles per hour, had exceeded its legal capacity. Hence, he knew, the operator came from the Blue Class, engineers and technicians capable of tinkering with their wheels. Arrest, therefore, would be a tricky matter.

By radio Myers contacted a police vessel ten miles north along the freeway. "Shoot its power supply out as it passes you," he suggested to his brother officer. "It's going too fast to block, right?"

At 3:10 A.M. the vehicle was stopped; powerless, it had coasted to a halt on the freeway shoulder. Officer Myers pressed buttons, flew leisurely north until he spotted the helpless wheel, plus the red-lit police wheel making its way through heavy traffic toward it. He landed at the exact instant that his compatriot arrived on the scene.

Together, warily, they walked to the stalled wheel, gravel crunching under their boots.

In the wheel sat a slim man wearing a white shirt and tie; he stared straight ahead with a dazed expression, making no move to greet the two gray-clad officers with their laser rifles, anti-pellet bubbles protecting their bodies from thigh to cranium. Myers opened the door of the wheel and glanced in, while his fellow officer stood with rifle in hand, just in case this was another come-on; five men from the local office, San Francisco, had been killed this week alone.

"You know," Myers said to the silent driver, "that it's a mandatory two-year suspension of license if you tamper with your wheel's speed governor. Was it worth it?"

After a pause the driver turned his head and said, "I'm sick."

"Psychically? Or physically?" Myers touched the emergency button at his throat, making contact with line 3, to San Francisco General Hospital; he could have an ambulance here in five minutes, if necessary.

The driver said huskily, "Everything seemed unreal to me. I thought if I drove fast enough I could reach some place where it's – solid." He put his hand gropingly against the dashboard of his wheel, as if not really believing the heavily-padded surface was there.

"Let me look in your throat, sir," Myers said, and shone his flashlight in the driver's face. He turned the jaw upward, peered down past well-cared-for teeth as the man reflexively opened his mouth.

"See it?" his fellow officer asked.

"Yes." He had caught the glint. The anti-carcinoma unit, installed in the throat; like most non-Terrans this man was cancer phobic. Probably he had spent most of his life in a colony world, breathing pure air, the artificial atmosphere installed by autonomic reconstruct equipment prior to human habitation. So the phobia was easy to understand.

"I have a full-time doctor." The driver reached now into his pocket, brought out his wallet; from it he extracted a card. His hand shook as he passed the card to Myers. "Specialist in psychosomatic medicine, in San Jose. Any way you could take me there?"

"You're not sick," Myers said. "You just haven't fully adjusted to Earth, to this gravity and atmosphere and milieu factors. It's three-fifteen in the morning; this doctor – Hagopian or whatever his name is – can't see you now." He studied the card. It informed him:

This man is under medical care and should any

bizarre behavior be exhibited obtain medical

help at once.

"Earth doctors," his fellow officer said, "don't see patients after hours; you'll have to learn that, Mr. -" He held out his hand. "Let me see your operator's license, please."

The entire wallet was reflexively passed to him.

"Go home," Myers said to the man. His name, according to the license, was John Cupertino. "You have a wife? Maybe she can pick you up; we'll take you into the city… better leave your wheel here and not try to drive any more tonight. About your speed -"

Cupertino said, "I'm not used to an arbitrary maximum. Ganymede has no traffic problem; we travel in the two and two-fifties." His voice had an oddly flat quality. Myers thought at once of drugs, in particular of thalamic stimulants; Cupertino was hag-ridden with impatience. That might explain his removal of the official speed regulator, a rather easy removal job for a man accustomed to machinery. And yet -

There was more. From twenty years' experience Myers intuited it.

Reaching out he opened the glove compartment, flashed his light in. Letters, an AAA book of approved motels…

"You don't really believe you're on Earth, do you, Mr. Cupertino?" Myers said. He studied the man's face; it was devoid of affect. "You're another one of those bippity-bop addicts who thinks this is a drug-induced guilt-fantasy… and you're really home on Ganymede, sitting in the living room of your twenty-room demesne – surrounded no doubt by your autonomic servants, right?" He laughed sharply, then turned to his fellow officer. "It grows wild on Ganymede," he explained. "The stuff. Frohedadrine, the extract's called. They grind up the dried stalks, make a mash of it, boil it, drain it, filter it, and then roll it up and smoke it. And when they're all done -"

"I've never taken Frohedadrine," John Cupertino said remotely; he stared straight ahead. "I know I'm on Earth. But there's something wrong with me. Look." Reaching out, he put his hand through the heavily-padded dashboard; Officer Myers saw the hand disappear up to the wrist. "You see? It's all insubstantial around me, like shadows. Both of you; I can banish you by just removing my attention from you. I think I can, anyhow. But – I don't want to!" His voice grated with anguish. "I want you to be real; I want all of this to be real, including Dr. Hagopian."