Cities in Flight

“I remember your City Fathers,” Miramon said, with a brief ironical motion of his eyebrows which was perhaps a last vestigial tremor of his old savage awe at the things which were the city and of the city. “But the major parameter that needs to be filled here is a precise determination of the energy level of the other universe.”

“Why, that shouldn’t be so very difficult,” Dr. Schloss said, in dawning astonishment. “That can’t be anything but a transform of energy level in our own universe; the mayor’s right, the City Fathers could give you that almost before you could finish stating the problem to them; t-tau transforms are the fundamental stuff of faster-than-light space travel—I’m astonished that you’ve been able to get along without them.”

“Not so,” Jake said. “No doubt the t-tau relationships are congruent on both sides of the barrier, I don’t doubt that for a minute, but you’re dealing in sixteen dimensions here; along what axis are you going to impose the congruency? Are you going to assume that t-time and tau-time apply uniformly and transformably along all sixteen axes? You can’t do that, unless you’re willing to involve the total system in such a double, which in t-time involves a monobloc for the whole apparatus; that’s hopeless. At least it’s hopeless for us, in the time we have left; we’d be frittering away our days in chase of endlessly retreating decimals. You might just as well set the City Fathers to work giving you a final figure for pi.”

“I stand corrected,” Dr. Schloss said, his tone halfway between wry humor and stiff embarrassment. “You’re quite right, Miramon; there’s a discontinuity here which we can’t read from theory. How inelegant.”

“Elegance can wait,” Amalfi said. “In the meantime, why is it so impossible to get an energy-level reading from the other side? Dr. Schloss, your research group used to talk about their hopes of constructing an anti-matter artifact. Couldn’t we use such a thing as an exploratory missile to the other side?”

“No,” Dr. Schloss said promptly. “You forget that such an object wouldn’t be on the other side—it would be on our side. We would have to work out some way of assembling it in the future of the experiment; by the time we were first able to see it, in the present of the experiment, it would be in an advanced state of decay, to say the least, and would then evolve only to the condition in which we assembled it. No reading that we got from it would tell us anything. but how anti-matter behaves in our universe; it would tell us nothing about any universe in which anti-matter is normal.”

After a moment, he added thoughtfully, “And besides, that would be a project hard to realize in anything under a century, I’d be more inclined to say it would take two; under the circumstances I too would rather be playing poker.”

“Well, I wouldn’t,” Jake said unexpectedly. “I think Amalfi may be right in principle. Difficult though the problem is, there ought to be some sort of probe that we could extend across the discontinuity. Mind you, I agree that the anti-matter artifact is the wrong approach entirely; the thing would have to be absolutely immaterial, a construct made entirely out of what we could pick up in No Man’s Land. But seeing across long distances under great odds is the discipline I was trained in. I don’t think we should count this an impossible problem. Schloss, how do you feel about this? If you and your group are willing to give up your anti-matter artifact for poker, would you be willing to work with me on this a while? I’ll need your background, but you’ll need my point of view; between us we just might devise the instrument and get the message. Mind you, Miramon, I hold out no hope, but—”

“—except the hope you hold out.” Miramon said, his eyes shining. “Now I am hearing from you what I hoped to hear. This is the voice of the Earth of memory. We will give you everything you need that is within our power to give; we give you our planet, to begin with; but the universe, the twin universes, the unthinkable meta-universe you must take for yourselves. We remember you now; you have always had that boundless ambition.” His voice darkened suddenly. “And we shall be your disciples; that, too, is as it has always been. Only begin; that is all we ask.”

Amalfi gathered the consensus of the present eyes around the chart table. Such agreement as he needed from the listeners on New Earth he was able to gather almost as well from the silence.

“I think,” he said slowly, “that we have begun already.”

CHAPTER FOUR: Fabr-Suithe