"Aye."

"I've seen that expression before. What are you thinking about?"

The engineer looked at him, shrugged, and said mildly, "Chess."

"What, especially?"

"Oh, a very general thing. The reciprocity of the game. That's what makes it the magnificent thing it is. Most human enterprises can gang up on a man, slap him with one disaster after another without pause. But not chess. No matter who your opponent might be, every time he does something to you, _it's your move_."

"Very comforting. Have you any idea of how we move now?"

Hoskins looked at him, a gentle surprise on his aging face. "You missed my point, Skipper. _We_ don't move."

"Oh," the Captain whispered. His face tautened as it paled, "I ... I see. We pushed the airlock b.u.t.ton to get out. Countermove: It wouldn't work. We tried the manual. Countermove: It broke off. And so on. Now we've tried to fly the ship out. Oh, but Hoskins--Johnny broke. Isn't that countermove enough?"

"Maybe. Maybe you're right. Maybe the move wasn't trying the drive controls, though. Maybe the move was to do what was necessary to knock Johnny out." He shrugged again. "We'll very soon see."

The Captain exhaled explosively through his nostrils. "We'll find out if it's our move by moving," he gritted. "Ives! Paresi! We're going to go over this thing from the beginning. First, try the port. You, Ives."

Ives grunted and went to the ship's side. Then he stopped.

"_Where is the port?_"

Anderson and Paresi followed Ives' flaccid, shocked gaze to the bulkhead where there had been the outline of the closed port, and beside it the hole which had held the axle of the manual wheel, and which now was a smooth, seamless curtain of impenetrable black. But Hoskins looked at the Captain first of all, and he said "_Now_ it's our move," and only then did he turn with them to look at the darkness.

III

_The unfamiliar, you say, is the unseen, the completely new and strange? Not so. The epitome of the unfamiliar is the familiar inverted, the familiar turned on its head. View a familiar place under new conditions--a deserted and darkened theater, an empty night club by day--and you will find yourself more influenced by the emotion of strangeness than by any number of unseen places.

Go back to your old neighborhood and find everything changed.

Come into your own home when everyone is gone, when the lights are out and the furniture rearranged--there I will show you the strange and frightening ghosts that are the shapes left over when reality superimposes itself upon the images of memory. The goblins lurk in the shadows of your own room...._ Owen Miller Essays on Night and the Unfamiliar

For one heart-stopping moment the darkness had seemed to swoop in upon them like the clutching hand of death. Instinctively they had huddled together in the center of the room. But when the second look, and the third, gave them rea.s.surance that the effect was really there, though the cause was still a mystery, then half the mystery was gone, and they began to drift apart. Each felt on trial, and held tight to himself and the picture of himself he empathized in the others' eyes.

The Captain said quietly, "It's just ... there. It doesn't seem to be spreading."

Hoskins gazed at it critically. "About half a meter deep," he murmured.

"What do you suppose it's made of?"

"Not a gas," said Paresi. "It has a--a sort of surface."

Ives, who had frozen to the spot when first he saw the blackness on his way to the port, took another two steps. The hand which had been half lifted to touch the control continued upward relievedly, as if glad to have a continuous function even though its purpose had changed.

"Don't touch it!" rapped the Captain.

Ives turned his head to look at the Captain, then faltered and let the hand drop. "Why not?"

"Certainly not a liquid," Paresi mused, as if there had been no interruption. "And if it's a solid, where did that much matter come from? Through the hull?"

Hoskins, who knew the hull, how it was made, how fitted, how treated once it was in place, snorted at the idea.

"If it was a gas," said Paresi, "there'd be diffusion. _And_ convection.

If it were poisonous, we'd all be dead. If not, the chances are we'd smell it. And the counter's not saying a thing--so it's not radioactive."

"You trust the counter?" asked Ives bitterly.

"I trust it," said Paresi. His near-whisper shook with what sounded like pa.s.sion. "A man must have faith in something. I hold that faith in every single function of every part of this ship until each and every part is separately and distinctly proved unworthy of faith!"

"Then, by G.o.d, you'll understand my faith in my own two hands and what they feel," snarled Ives. He stepped to the bulkhead and brought his meaty hand hard against it.

"_Touche_," murmured Hoskins, and meant either Ives' remark or the flat, solid smack of the hand against the blackness.

In his sleep, Johnny uttered a high, soft, careless tinkle of youthful, happy laughter.

"Somebody's happy," said Ives.

"Paresi," said the Captain, "what happens when he wakes up?"

Paresi's eyebrows shrugged for him. "Practically anything. He's reached down inside himself, somewhere, and found a way out. For him--not for any of the rest of us. Maybe he'll ignore what we see. Maybe he'll think he's somewhere else, or in some other time. Maybe he'll _be_ someone else. Maybe he won't wake up at all."

"Maybe he has the right idea," said Ives.

"That's the second time you've made a crack like that," said Paresi levelly. "Don't do it again. You can't afford it."

"We can't afford it," the Captain put in.

"All right," said Ives, with such docility that Paresi shot him a startled, suspicious glance. The big communications man went to his station and sat, half-turned away from the rest.

"What are they after?" complained the Captain suddenly. "What do they want?"

"Who?" asked Paresi, still watching Ives.

Hoskins explained, "Whoever it was who said 'Welcome to our planet.'"

Ives turned toward them, and Paresi's relief was noticeable. Ives said, "They want us dead."

"Do they?" asked the Captain.

"They don't want us to leave the ship, and they don't want the ship to leave the planet."

"Then it's the ship they want."

"Yeah," amended Ives, "without us."