Poul Anderson: The Year of the Ransom

Upbringing or no, she must be hideously shaken to raise such a question, she who had also been trained at that academy back in the Oligocene period—back before there was any human history for its existence to upset. Everard didn’t think the less of her. Rather, it made him appreciate the courage that maintained calmness. And, after all, her work did not expose her to the paradoxes and hazards of mutable time. Nor had Tamberly experienced them—he had been a straightforward, if disguised, observer—till suddenly they laid hold on him.

“You know that’s forbidden.” He kept his tone soft. “Causal loops can too easily turn into temporal vortices. Annulment of the whole effort would be the least of the disasters we’d risk. And it’d be futile, anyway. Those records, those memories could be of something that never happened. Just think how our actions would be influenced by what we believed was foreknowledge. No, we’ve got to go through with our jobs in as nearly causational a way as we possibly can, in order to make our successes or failures real.”

For reality is conditional. It is like a wave pattern on a sea. Let the waves—the probability-waves of ultimate underlying quantum chaos—change their rhythm, and abruptly that tracery of ripples and foam-swirls will be gone, transformed into another. Already in the twentieth century, physicists had a dim glimmering of this. But not until time travel came to be did the fact of it stab into human lives.

If you have gone into the past, you have made it your present. You have the same free will as always. You have laid no special constraints on yourself. Inevitably, you influence what happens.

Ordinarily the effects are slight. It’s as if the space-time continuum were like a mesh of tough rubber bands, restoring its configuration after it’s felt some disturbing force. Indeed, ordinarily you are a part of that past. There really was a man who traveled with Pizarro and called himself Brother Tanaquil. That was “always” true, and the fact that he wasn’t born in that century, but long afterward, is incidental. If he does minor anachronistic things, they don’t matter; they may excite comment, but memory of them will die out. It’s a philosophical question whether or not reality keeps flickering through such insignificant changes.

Some acts, though, do make a difference. What if a lunatic went back to the fifth century and provided Attila the Hun with machine guns? That kind of thing is so obvious it’s fairly easy to guard against. But subtler changes—The Bolshevik Revolution of 1917 came near failing. Only the energy and genius of Lenin pulled it through. What if you traveled to the nineteenth century and quietly, harmlessly prevented Lenin’s parents from ever meeting each other? Whatever else the Russian Empire later became, it would not be the Soviet Union, and the consequences of that would pervade all history afterward. You, pastward of the change, would still be there; but returning futureward, you’d find a totally different world, a world in which you yourself were probably never born. You’d exist, but as an effect without a cause, thrown up into existence by that anarchy which is at its foundation.

When the first time machine had been built, the Danellians appeared, the superhumans who inhabit the remote future. They ordained the rules of time traffic and established the Patrol to enforce these. Like other police, we mostly assist people on their lawful occasions; we get them out of tight spots when we can; we give what help and kindness we dare to the victims of history. But always our basic mission is to protect and preserve that history, because it is what shall finally bring forth the glorious Danellians.

“I’m sorry,” Helen Tamberly said. “That was idiotic of me. But I’ve been . . . so worried. Stephen was only supposed to be gone three days. Six years for him, three days for me. He wanted that much time merely to reaccustom himself to this milieu. He meant to wander about incognito, getting back into Victorian habits, so he wouldn’t absent-mindedly do something that would surprise the servants or our local friends. It’s been a week!” She bit her lip. “Forgive me. I’m still babbling, am I not?”

“Far from it.” Everard took forth pipe and tobacco pouch. He wanted that small comfort in the face of this anguish. “Loving couples like you make a bachelor like me feel wistful. But let’s get down to business. Best for us both. You’re native to England of this century, aren’t you?”

She nodded. “Born in Cambridge, 1856. I was orphaned at seventeen, left with modest independent means, studied classics, became rather a bluestocking, eventually was recruited into the Patrol. Stephen and I met at the Academy. In spite of the age difference—which doesn’t matter for us, thank God—we . . . hit it off, and married after we graduated. He didn’t think I would like his birthtime.” She grimaced. “I visited it, and he was right. For his part, he felt—feels happy here and now. His persona is that of an American employee of the import firm. When I go off to my own work, or bring some home with me, well, it is unusual for a woman to have scholarly interests, but not extraordinary. Marie Sklodowska—Madame Curie—will enroll in the Sorbonne just a few years hence.”

“And people in this milieu are better at minding their own affairs than they are in mine.” Everard occupied himself with tamping his briar full. “Uh, I daresay you two do more things together than is common for man and wife these days.”

“Oh, yes.” Her eagerness was pathetic to hear. “Beginning with our holidays, in this era and that. We fell quite in love with archaic Japan, and have been back several times.” Everard concluded that that was a country isolated enough, with a population small and unsophisticated enough, illiterate, that the Patrol allowed occasional visits by blatant outsiders. “We’ve taken up handicrafts; pottery, for example; that ashtray beside you is his work—” Her voice died away.

Hastily, he queried onward. “Your field is ancient Greece?” The man who met him at the base hadn’t been sure.

“The Ionian colonies, chiefly in the seventh and sixth centuries before Christ.” She sighed. “It’s ironic that there the Patrol cannot admit me, a Nordic woman.” She tried to rally. “But as I said, we’ve seen much else that is wonderful.” Suitably outfitted, carefully guided. “No, I mustn’t complain.” The stoicism cracked. “If Stephen—if you do bring him back—do you think he can be persuaded to settle down and do research in place, like me?”

Everard’s match cast a loud scrit across the silence that followed. He rolled smoke over his tongue and cradled the rough wood in his hand. “Don’t count on it,” he said. “Besides, good field historians are scarce. Good people of every kind are. You may not be fully aware of how undermanned we are in the corps. Your sort make it possible for his sort to operate. And mine. Normally we came home safe.”

Patrol work was anything but bravado and derring-do. It depended on exact knowledge. Agents like Steve collected most of that on the spot, but they too required the patient labor of those like Helen, who collated the reports. Thus, observers in Ionia brought back immensely more information than those chronicles and relics that survived into the nineteenth century had ever contained; but they could not do her job, which was to put it all together, interpret, arrange, and prepare briefings for the next expeditions.

“Someday he must find something safer.” She blushed. “I refuse to start a family until he does.”

“Oh, I’m sure he’ll move into an administrative post in due course,” Everard answered. If we can save him. “He’ll have gotten far too much experience for us to let him go on grubbing around. Instead, he’ll direct the efforts of newer people. Um, that may well require his assuming a Spanish colonial persona for a few decades. It’d be easiest if you could join him.”