Paresi and the Captain ran aft together, and together they stopped four paces away from the bulging blackness.

"Johnny!" The Captain's voice cracked with the agonized effort of his cry. He stepped to the black wall, pounded it with the heel of his hand.

"He won't hear you," said Paresi bleakly. "Come back, Captain. Come back."

"Why him? Why Johnny? They've done everything they could to Johnny; you said so yourself!"

"Come back," Paresi said again, soothing. Then he spoke briskly: "Can't you see they're not doing anything to him? They're doing it to us!"

The Captain stood rigidly, staring at the featureless intrusion. He turned presently. "To us," he parroted. Then he stumbled blindly to the doctor, who put a firm hand on his biceps and walked with him to the forward acceleration couch.

The Captain sat down heavily with his back to this new invasion. Paresi stood by him reflectively, then walked silently to Hoskins.

The engineer sat over his chessboard in deep concentration. The far edge of the board seemed to be indefinite, lost partially in the mysterious sable curtain which covered the bulkhead.

"Hoskins."

No answer.

Paresi put his hand on Hoskins' shoulder. Hoskins' head came up slowly. He did not turn it. His gaze was straight ahead into the darkness. But at least it was off the board.

"Hoskins," said Paresi, "why are you playing chess?"

"Chess is chess," said Hoskins quietly. "Chess may symbolize any conflict, but it is chess and it will remain chess."

"Who are you playing with?"

No answer.

"Hoskins—we need you. Help us."

Hoskins let his gaze travel slowly downward again until it was on the board. "The word is not the thing," he said. "The number is not the thing. The picture, the ideograph, the symbol—these are not the thing. Conversely ..."

"Yes, Hoskins."

Paresi waited. Hoskins did not move or speak. Paresi put his hand on the man's shoulder again, but now there was no response. He cursed suddenly, bent and brought up his hand with a violent smash and sent board and pieces flying.

---

When the clatter had died down Hoskins said pleasantly, "The pieces are not the game. The symbols are not the thing." He sat still, his eyes fixed on the empty chair where the board had been. He put out a hand and moved a piece where there was no piece to a square which was no longer there. Then he sat and waited.

Paresi, breathing heavily, backed off, whirled, and went back to the Captain.

Anderson looked up at him, and there was the glimmer of humor in his eyes. "Better sit down and talk about something different, Doctor."

Paresi made an animal sound, soft and deep, far back in his throat, plumped down next to the Captain, and kneaded his hands together for a moment. Then he smiled. "Quite right, skipper. I'd better."

They sat quietly for a moment. Then the Captain prompted, "About the different breaking point...."

"Yes, Captain?"

"Perhaps you can put your finger on the thing that makes different men break in different ways, for different reasons. I mean, Johnny's case seemed pretty clear cut, and what you haven't explained about Hoskins, Hoskins has demonstrated pretty clearly. About Ives, now—we can skip that for the time he'll be unconscious. But if you can figure out where you and I might break, why—we'd know what to look for."

"You think that would help?"

"We'd be prepared."

Paresi looked at him sharply. "Let's hypothesize a child who is afraid of the dark. Ask him and he might say that there's a something in dark places that will jump out at him. Then assure him, with great authority, that not only is he right but that it's about to jump any minute, and what have you done?"

"Damage," nodded the Captain. "But you wouldn't say that to the child. You'd tell him there was nothing there. You'd prove there wasn't."

"So I would," agreed the doctor. "But in our case I couldn't do anything of the kind. Johnny broke over machines that really didn't work. Hoskins broke over phenomena that couldn't be measured nor understood. Ives broke over things that scuttled and crawled. Subjectively real phenomena, all of them. Whatever basic terrors hide in you and in me will come to face us, no matter how improbable they might be. And you want me to tell you what they are. No, skipper. Better leave them in your subconscious, where you've buried them."

"I'm not afraid," said the Captain. "Tell me, Paresi! At least I'll know. I'd rather know. I'd so damn much rather know!"

"You're sure I can tell you?"

"Yes."

"I haven't psychoanalyzed you, you know. Some of these things are very hard to—"

"You do know, don't you?"

---

"Damn you, yes!" Paresi wet his lips. "All right, then. I may be doing a wrong thing here.... You've cuddled up to the idea that I'm a very astute character who automatically knows about things like this, and it's been a comfort to you. Well, I've got news for you. I didn't figure all these things out. I was told."

"Told?"

"Yes, told," said Paresi angrily. "Look, this is supposed to be restricted information, but the Exploration Service doesn't rely on individual aptitude tests alone to make up a crew. There's another factor—call it an inaptitude factor. In its simplest terms, it comes to this: that a crew can't work together only if each member is the most efficient at his job. He has to need the others, each one of the others. And the word need predicates lack. In other words, none of us is a balanced individual. And the imbalances are chosen to match and blend, so that we will react as a balanced unit. Sure I know Johnny's bugaboos, and Hoskins', and yours. They were all in my indoctrination treatments. I know all your case histories, all your psychic push-buttons."

"And yours?" demanded the Captain.

"Hoskins, for example," said Paresi. "Happily married, no children. Physically inferior all his life. Repressed desire for pure science which produced more than a smattering of a great many sciences and made him a hell of an engineer. High idealistic quotient; self sacrifice. Look at him playing chess, making of this very real situation a theoretical abstraction ... like leaving a marriage for deep space.

"Johnny we know about. Brought up with never failing machines. Still plays with them as if they were toys, and like any imaginative child, turns to his toys for reassurance. He needs to be a hero, hence the stars....

"Ives ... always fat. Learned to be easy-going, learned to laugh with when others were laughing at, and bottling up pressures every time it happened. A large appetite. He's here to satisfy it; he's with us so he can eat up the galaxies...."

There was a long pause. "Go on," said the Captain. "Who's next? You?"

"You," said the doctor shortly. "You grew up with a burning curiosity about the nature of things. But it wasn't a scientist's curiosity; it was an aesthete's. You're one of the few people alive who refused a subsidized education and worked your way through advanced studies as a crewman on commercial space-liners. You became one of the youngest professors of philosophy in recent history. You made a romantic marriage and your wife died in childbirth. Since then—almost a hundred missions with E.A.S., refusing numerous offers of advancement. Do I have to tell you what your bugaboo is now?"

"No," said Anderson hoarsely. "But I'm ... not afraid of it. I had no idea your ..." He swallowed. "... information was that complete."

"I wish it wasn't. I wish I had some things to—wonder about," said Paresi with surprising bitterness.

---

The Captain looked at him shrewdly. "Go on with your case histories."

"I've finished."

"No you haven't." When Paresi did not answer, the Captain nudged him. "Johnny, Ives, Hoskins, me. Haven't you forgotten someone?"

"No I haven't," snarled Paresi, "and if you expect me to tell you why a psychologist buries himself in the stars, I'm not going to do it."

"I don't want to be told anything so general," said the Captain. "I just want to know why you came out here."

Paresi scowled. The Captain looked away from him and hazarded, "Big frog in a small pond, Nick?"

Paresi snorted.

Anderson asked, "Women don't like you, do they, Nick?"

Almost inaudibly, Paresi said, "Better cut it out, skipper."

Anderson said, "Closest thing to being a mother—is that it?"

Paresi went white.

The Captain closed his eyes, frowned, and at last said, "Or maybe you just want to play God."

"I'm going to make it tough for you," said Paresi between his teeth. "There are several ways you can break, just as there are several ways to break a log—explode it, crush it, saw it, burn it.... One of the ways is to fight me until you win. Me, because there's no one else left to fight you. So—I won't fight with you. And you're too rational to attack me unless I do. That is the thing that will make it tough. If you must break, it'll have to be some other way."

"Is that what I'm doing?" the Captain asked with sudden mildness. "I didn't know that. I thought I was trying to get your own case history out of you, that's all. What are you staring at?"

"Nothing."

There was nothing. Where there had been forward viewports, there was nothing. Where there had been controls, the communication station, the forward acceleration panels and storage lockers; the charts and computers and radar gear—there was nothing. Blackness; featureless, silent, impenetrable. They sat on one couch by one wall, to which was fixed one table. Around them was empty floor and a blackness. The chess-player faced into it, and perhaps he was partly within it; it was difficult to see.

The Captain and the medical officer stared at one another. There seemed to be nothing to say.