The Shield of Time Read Online Free PDF Page A

But biologically I’m in my thirties,
he wanted to tell her and mustn’t.
Antisenescence treatment, preventive medicine future to this century. We Patrol agents have our perks. We need them, to carry us through some of the things we see.
He wrenched his mind into an attempt at lightness. “Actually, Galileo never said what I quoted, under his breath or aloud. It’s a myth.”
The kind of myth humans live by, more than they do by facts.
    “Too bad.” She leaned back on the sofa and, in her turn, smiled again. “Manse. Okay, then, those timecycles or hoppers or whatever you call them, they are what they are, and if you tried to explain, scientists today wouldn’t understand.”
    “They’ve got a glimmering already. Non-inertial reference frames. Quantum gravity. Energy from the vacuum. Bell’s theorem was lately violated in the laboratory, wasn’t it? Or won’t that happen for another year or two? Stuff about wormholes in the continuum, Kerr metrics, Tipler machines—Not that I understand it myself. Physics was not my best subject at the Patrol Academy, by a long shot. It’ll be many thousands of years from now when the last discoveries are made and the first working space-time vehicle is built.”
    She frowned, concentrating. “And … expeditions begin. Scientific, historical, cultural—commercial, I suppose? Even military? I hope not that. But I can see where they’d soon need police, a Time Patrol, to help and advise and rescue and … keep travelers in line, so you don’t get robberies or swindles or”—she grimaced—“taking advantage of people in the past. They’d be helpless against knowledge and apparatus from the future, wouldn’t they?”
    “Not always. As you can testify.”
    She started, then uttered a shaky laugh. “Hoo boy, can I ever! Are there many guys in history as tough and smart as Luis Castelar?”
    “Enough. Our ancestors didn’t know everything we do, but they did know things we don’t, stuff we’ve forgotten or leave moldering in our libraries. And they averaged the same brains.” Everard sat forward in his chair. “Yes, mainly we in the Patrol are cops, doing the work you mentioned, plus conducting research of our own. You see, we can’t protect the pattern of events unless we know it well. That’s our basic job, protection. That’s the reason the Danellians founded our corps.”
    She lifted her brows. “Danellians?”
    “English version of their name in Temporal. Temporal’s our mutual language, artificial, developed to deal with the twists and turns of time travel. The Danellians—Some of them appeared, will appear, when chronokinesis was newly developed.”
    He paused. His words turned low and slow. “That must have been … awesome. I met one once, for a few minutes. Didn’t get over it for weeks. Of course, no doubt they can disguise themselves when they want to, go among us in the form of human beings,
if
they ever want to. I’m not sure they do. They’re what comes after us in evolution, a million or more years uptime. The way we come after apes. At least that’s what most us suppose. Nobody knows for certain.”
    Her eyes went large, staring past him. “How much could Australopithecus know for certain about us?” she whispered.
    “Yeah.” Everard forced prosiness back into his tone. “They appeared, and commanded the founding of the Patrol. Otherwise the world, theirs and everybody’s, was doomed. It would not simply be wrecked, it would never have existed. On purpose or by accident, time travelerswould change the past so much that everything future-ward of them would be something else; and this would happen again and again till—I don’t know. Till complete chaos, or the extinction of the human race, or something like that brought a halt, and time travel had never occurred in the first place.”
    She had gone pale. “But that doesn’t make sense.”
    “By ordinary logic, it doesn’t. Think, though. If you go into the past, you’re as