between sending him aft with the ordinaries and keeping him here with the superiors. Conveniently for you we—the ship—branched into two probabilities at that point.
You could have covered yourself by both ordering him aft with the ordinaries and keeping him here with the superiors. Justice would be done and we'd be insured against the chance of a poor decision.
Unfortunately that convenient arrangement doesn't work for our little minds; the very convenience of it nearly broke us. But I'm getting so I can handle one at a time. I doubt that I'll ever be able to handle both, but it's good enough to separate and leave one of yourself in temporary silence.
'Now, for instance, I'm using the me that's in the Sphere Nine in which Yancey fainted. The other me is in the Sphere Nine in which you clubbed and finally killed the Star that I didn't hypnotize. You—or rather youse—have been wavering your consciousness between the two Sphere Nines. In the one in which this me is, you tried to pick up Yancey; in the other one you did a neat job on Star.'
'Executive Office …' said a pleading voice over the—one of the—
phones. 'I'll take it,' said the active Mamie Tung.
'Psychologist speaking.'
'Ordinary speaking—what happened— Ratings Ten, Twelve and Three've beat each other's brains out …'
'Cut, will you. I'm going to check on that.'
'Cut, Officer,' said the pitifully bewildered voice.
The active Mamie Tung stacked herself against a wall; slowly the passive came to life and experimentally stepped over to the phone, nodding at Will Archer, who was experimenting quietly in transference of attention.
'Commons room,' she said into the phone.
There was no answer.
'They've probably all murdered each other in this probability. Now that I'm in it, I'll see what I can do with Yancey.'
She took hold of the staring, wandering, mumbling woman, tried to sit her down. The creature broke away with a thin, distant scream and fled through the tube.
'Just as well. This branch seems to be an exceptionally sour one. That girl's mind was hopelessly wrecked. Let's both get into the other and treat the other Yancey.'
She smoothly effected the change of person and kneeled professionally beside the rigid, twisted form of the Clericalist. A few soothing words worked wonders. It was more fear of madness than any mental lesion itself that had immobilized her, and fear flies before confidence.
Madame Tung explained what had happened to them, did not go into details as to the other body the girl had in the other branch.
'Now for Star,' she said distastefully.
'Too late for Star,' reported Will Archer. 'He's dead.'
'So? I mean the one in the chair.'
'That's the one. His heart's stopped and he has dark circles around the eyes. Like a fractured skull.'
'Something to remember. I'm afraid my technique wasn't as delicate as it should have been. Damned lucky thing I have his math. We may be able to get back yet.'
'You mean we aren't saddled with this thing forever?' Archer winced as he saw his other body in the probability of madness and death, rigid as a corpse against the wall.
'I hope not. I won't know until I've worked some more with this knowledge I picked up in such a hurry. I actually feel a curiosity, for the first time in my life, as to how a calculating machine works!'
'It's time you learned,' said the Clericalist. She was enormously bucked-up to find that she could be of some use.
'Come on to the computations room.'
They slid through the tube, over the noisy protest of the gibbering other Yancey. The hitherward Yancey looked at it distastefully, but did not comment except for: 'How much of me is that?'
'Nonsense. I mean your question is a contradiction in terms. Quantity has nothing to do with it. What you see there is something in the land of might-have-been. That it happens to be something unpleasant makes no difference.'
'It does to me,' said Yancey positively.
'Then be thankful that you aren't hyperspatial Siamese twins with a corpse, like the survivors among the ordinaries. Or all dead any way you figure it, like Star.'
She rubbed her hands over the calculating machinery, again in its neat rows and aisles. Experimentally she punched keys here and there, abstractedly fishing for the stolen knowledge which worked her fingers.
Suddenly, furiously, she set to work, immersing herself in figure-tapes, swinging around herself a mighty rampart of the basic machinery.
Yancey and Will tiptoed away, superfluously. For it would have taken a hammer blow on the head to interrupt the combined willpower of two such formidables as the late Star Macduff and the present Madame Mamie Tung.
5
The Executive Officer visited the ordinaries that were left, found a few men of strong fiber who had refused to succumb to the terror that had gripped the ship. He explained simply what had happened, and they accepted the explanation as their due after a very difficult time. He taught them the technique—which they had stumbled on by themselves in a haphazard way—of concentrating on one path of probabilities and the advisability of staying there, since any moment the other might vanish into the great unknown.
Only then did he begin to puzzle himself over what had happened—
who their boarders had been, how they had done this to Sphere Nine.
He recalled what they had said, which was little comfort but sound sense. They had assured him that he could not possibly understand their motivation for behaving as they did. Yancey told him that if this was a sample of their own behavior she most heartily agreed.
Madame Tung emerged from the calculations room with a splitting headache and a fistful of formulae from which tubes could be constructed to build up something new in electromagnetic phenomena—a probability field which could be applied in this one very special case to good effect.
They constructed the thing with ease, hosed the ship with it, and were gratified to see the other path vanish— the path of the lunatic Yancey, the skull-split Star, the murdered ordinaries, and the cataleptic Mamie Tung and Will Archer.
'Landing?' asked Mamie.
'Why not?'
'I can't argue on those grounds, Will. But what happened on your stern resolution to take a sample of the protosphere and run back to Earth?'
'You're the Psychologist. You tell me.'
'Those strangers had some violent impact on us. Behind their fronts was something enormously intriguing. You're full of what killed the fabulous cat.'
'Right. And I'm not going to rest until I find out how that protosphere came about, and what it means to us.'
'Oh, I can tell you that,' said one of the visitors stepping through the hull. 'Insofar as anyone can tell anyone else anything in this symbology of yours.'
'Talk fast,' said Will stiffly. 'Our time is important.'
The stranger chuckled delightedly. 'I could give you all the time you want,' he said. 'I gave you all the probabilities you wanted. I could have given you an infinite number, practically. How much time did you say you wanted—twenty thousand years? A hundred thousand? And in the past, present or future?'
'No thanks,' said Will hastily. 'You were going to tell us about the protosphere.'
'I was. It's our garbage-can, in a way. We had our neat little solar system, well-balanced around two suns; and
