“Why, your old friend.” Gross signaled to the field tower through the window.

“My old friend?”

“The Professor. He took quite an active interest.” Gross turned to the Pilot. “Let’s get going. We have to take this out past gravity for the test, they tell me. Well, perhaps it’s for the best. Are you ready?”

“Sure.” The Pilot sat down and moved some of the controls around. “Any time.”

“Go ahead, then,” Gross said.

“The Professor—” Kramer began, but at that moment there was a tremendous roar and the ship leaped under him. He grasped one of the wall holds and hung on as best he could. The cabin was filling with a steady throbbing, the raging of the jet turbines underneath them.

The ship leaped. Kramer closed his eyes and held his breath. They were moving out into space, gaining speed each moment.

“Well, what do you think?” Winter said nervously. “Is it time yet?”

“A little longer,” Kramer said. He was sitting on the floor of the cabin, down by the control wiring. He had removed the metal covering-plate, exposing the complicated maze of relay wiring. He was studying it, comparing it to the wiring diagrams.

“What’s the matter?” Gross said.

“These changes. I can’t figure out what they’re for. The only pattern I can make out is that for some reason—”

“Let me look,” the Pilot said. He squatted down beside Kramer. “You were saying?”

“See this lead here? Originally it was switch controlled. It closed and opened automatically, according to temperature change. Now it’s wired so that the central control system operates it. The same with the others. A lot of this was still mechanical, worked by pressure, temperature stress. Now it’s under the central master.”

“The brain?” Gross said. “You mean it’s been altered so that the brain manipulates it?”

Kramer nodded. “Maybe Professor Thomas felt that no mechanical relays could be trusted. Maybe he thought that things would be happening too fast. But some of these could close in a split second. The brake rockets could go on as quickly as—”

“Hey,” Winter said from the control seat. “We’re getting near the moon stations. What’ll I do?”

They looked out the port. The corroded surface of the moon gleamed up at them, a corrupt and sickening sight. They were moving swiftly toward it.

“I’ll take it,” the Pilot said. He eased Winter out of the way and strapped himself in place. The ship began to move away from the moon as he manipulated the controls. Down below them they could see the observation stations dotting the surface, and the tiny squares that were the openings of the underground factories and hangars. A red blinker winked up at them and the Pilot’s fingers moved on the board in answer.

“We’re past the moon,” the Pilot said, after a time. The moon had fallen behind them; the ship was heading into outer space. “Well, we can go ahead with it.”

Kramer did not answer.

“Mr. Kramer, we can go ahead any time.”

Kramer started. “Sorry. I was thinking. All right, thanks.” He frowned, deep in thought.

“What is it?” Gross asked.

“The wiring changes. Did you understand the reason for them when you gave the okay to the workmen?”

Gross flushed. “You know I know nothing about technical material. I’m in Security.”

“Then you should have consulted me.”

“What does it matter?” Gross grinned wryly. “We’re going to have to start putting our faith in the old man sooner or later.”

The Pilot stepped back from the board. His face was pale and set. “Well, it’s done,” he said. “That’s it.”

“What’s done?” Kramer said.

“We’re on automatic. The brain. I turned the board over to it—to him, I mean. The Old Man.” The Pilot lit a cigarette and puffed nervously. “Let’s keep our fingers crossed.”

The ship was coasting evenly, in the hands of its invisible pilot. Far down inside the ship, carefully armored and protected, a soft human brain lay in a tank of liquid, a thousand minute electric charges playing over its surface. As the charges rose they were picked up and amplified, fed into relay systems, advanced, carried on through the entire ship—

Gross wiped his forehead nervously. “So he is running it, now. I hope he knows what he’s doing.”

Kramer nodded enigmatically. “I think he does.”

“What do you mean?”

“Nothing.” Kramer walked to the port. “I see we’re still moving in a straight line.” He picked up the microphone. “We can instruct the brain orally, through this.” He blew against the microphone experimentally.

“Go on,” Winter said.

“Bring the ship around half-right,” Kramer said. “Decrease speed.”

They waited. Time passed. Gross looked at Kramer. “No change. Nothing.”

“Wait.”

Slowly the ship was beginning to turn. The turbines missed, reducing their steady beat. The ship was taking up its new course, adjusting itself. Nearby some space debris rushed past, incinerating in the blasts of the turbine jets.

“So far so good,” Gross said.

They began to breath more easily. The invisible pilot had taken control smoothly, calmly. The ship was in good hands. Kramer spoke a few more words into the microphone, and they swung again. Now they were moving back the way they had come, toward the moon.

“Let’s see what he does when we enter the moon’s pull,” Kramer said. “He was a good mathematician, the old man. He could handle any kind of problem.”

The ship veered, turning away from the moon. The great eaten-away globe fell behind them.

Gross breathed a sigh of relief. “That’s that.”

“One more thing.” Kramer picked up the microphone. “Return to the moon and land the ship at the first space field,” he said into it.

“Good Lord,” Winter murmured. “Why are you—”

“Be quiet.” Kramer stood, listening. The turbines gasped and roared as the ship swung full around, gaining speed. They were moving back, back toward the moon again. The ship dipped down, heading toward the great globe.

“We’re going a little fast,” the Pilot said. “I don’t see how he can put down at this velocity.”

The port filled up, as the globe swelled rapidly. The Pilot hurried toward the board, reaching for the controls. All at once the ship jerked. The nose lifted and the ship shot out into space, away from the moon, turning at an oblique angle. The men were thrown to the floor by the sudden change in course. They got to their feet again, speechless, staring at each other.

The Pilot gazed down at the board. “It wasn’t me! I didn’t touch a thing. I didn’t even get to it.”

The ship was gaining speed each moment. Kramer hesitated. “Maybe you better switch it back to manual.”

The Pilot closed the switch. He took hold of the steering controls and moved them experimentally. “Nothing.” He turned around. “Nothing. It doesn’t respond.”

No one spoke.

“You can see what has happened,” Kramer said calmly. “The old man won’t let go of it, now that he has it. I was afraid of this when I saw the wiring changes. Everything in this ship is centrally controlled, even the cooling system, the hatches, the garbage release. We’re helpless.”

“Nonsense.” Gross strode to the board. He took hold of the wheel and turned it. The ship continued on its course, moving away from the moon, leaving it behind.

“Release!” Kramer said into the microphone. “Let go of the controls! We’ll take it back. Release.”

“No good,” the Pilot said. “Nothing.” He spun the useless wheel. “It’s dead, completely dead.”

“And we’re still heading out,” Winter said, grinning foolishly. “We’ll be going through the first-line defense belt in a few minutes. If they don’t shoot us down—”

“We better radio back.” The Pilot clicked the radio to send. “I’ll contact the main bases, one of the observation stations.”

“Better get the defense belt, at the speed we’re going. We’ll be into it in a minute.”