"So how are you going to get around it?" she asked, and he was flattered by the confidence in his abilities her tone implied.

  "I have my ways, but it requires a little course change. There's one place—in Scotland, not England—where I think I can get you ashore without anyone talking to the press. I've got friends there."

  "Good." She relaxed and rested her head on his shoulder. Her hair blew around his face, tickling his nose gently, and his heart swelled. He'd become more or less inured to surprises where she was concerned, but the mad things which had happened to him had changed something deep inside him, as if some of his childhood wonder had reawakened beneath the years which had buried it. He supposed that was inevitable from the events themselves, but he knew Ludmilla had strengthened it just by being who she was.

  The exuberant way she made love had astonished and delighted him, yet now it seemed as inevitable as his own heartbeat. He'd seen himself settling into late middle age without a struggle—partly, he suspected, in reaction to his impending retirement and the tacit admission that the challenges and triumphs of his life now lay behind him and not ahead—but Ludmilla was an astounding alloy of age's wisdom and the playfulness of youth. She seemed to expect him to be the same, and so, inevitably, he'd become the same. It was a giddy sensation, and he was almost as grateful to her for restoring him to himself as he was for her trust.

  But the truly remarkable thing about her was that she was always herself. She could be as cold-blooded as the most hardened combat vet he'd ever met, or squeal like a child when he tickled her, but she was always the same person. She was whole, comfortable within herself, all of her apparent contradictions resolved into coherency at her core. He'd never known anyone else quite like that, and, in a way, he found that even more extraordinary than her technology or the strange, war-torn future from which she sprang.

  "Hey," he said gently, "wake up, sleepy head."

  "Hmm?" She'd been napping again. She still dozed off at the drop of a hat.

  "Are you sure you're all right?" He looked down at her as she yawned her way back to full awareness.

  "Oh, cert." She sat up and stretched like a cat. "I told you—I put my symbiote through a lot. We're still getting over it. Don't worry. I can stay awake if I need to, but it's not a bad idea to get as much rest as I can before we have to explain to anyone else, you know."

  "If you're sure."

  "I am." She gave his chest an affectionate pat. "But now that I'm awake again, what can I do for you?"

  "Had any more ideas about our Troll?" he asked, and her eyes darkened.

  "Not really." She stared pensively at the dark, distant coastline. "We don't know what—if anything—he's up to." She paused to watch an airliner sweep overhead, glinting in the sunlight high above them. They'd seen more and more of them as they drew closer to the end of their trip. "At least as long as those things keep coming over, we can be pretty sure he hasn't done anything too drastic," she said softly.

  "Yeah, but is that a good sign or a bad one?" he murmured.

  "I don't know." She watched the airliner for a few more moments, then tossed her head. "No, that's not right. It's a good one, because it probably means he hasn't decided how to wipe us yet. The longer he takes, the more time we have to find a way to stop him." She turned her eyes to his, and he saw the anxiety in them. "We may be able to take him out if we can find him, but I just don't see how we're going to locate him in the first place, and the longer we take doing that, the harder it's going to be to get to him."

  "Agreed. I only wish I knew more about his psychology," he said.

  "We've wished the same thing for the last two hundred years," she told him dryly. "Of course, Troll psychology, as distinct from Kanga psychology, has never been quite this important before."

  "Yeah." He fumbled for his pipe, and she watched him pack and light it. Smoking was a lost vice in her time, and she remained fascinated by the practice. He'd expected her to disapprove, but she hadn't said a word. Perhaps her own immunity to things like cancer had something to do with it.

  "Look," he said finally, once the tobacco was drawing nicely, "let's go at it from a different angle. If he does decide to wipe us out, we're probably up shit creek without a paddle. On—" He broke off as she erupted into laughter. He watched her for a moment, then growled at her. "Okay—what's so funny this time?"

  "Oh, I love that one! U-up shit c-creek?" She hugged her ribs and wailed. "Oh. Oh! How did we ever lose that one?"

  "Woman, you have a biology-obsessed mind," he said sternly.

  "I—I know," she admitted cheerfully, gasping for breath and wiping tears of hilarity from her eyes. She tried to look apologetic, but he could see her lips repeating the words silently and resigned himself to hearing them come back to haunt him sometime soon. "I'm sorry," she said finally, wiping her eyes one last time. "You were saying?"

  "I was saying that instead of beating our brains out trying to figure out how he'll go about wiping us out, we should give some thought to what else he might do."

  "But he's a Troll, Dick," she protested, her manner much more subdued. "They always kill humans. It's all they've ever done."

  "Maybe, but this is the first time one's been entirely on his own."

  "You're not suggesting he might plan on coexisting with us, are you?" She tried to keep the incredulity out of her voice.

  "That would be the best possibility, but, no, I don't expect it. Still, I can't help thinking that you're overlooking something, Milla."

  "Like what?" There was no hostility in the question. That was another thing he loved about her; she was one of the very few people he'd ever met who seemed to feel no ego involvement in discussions.

  "Check my thinking on this," he said slowly. "We have a Troll. From what you say, he hates us at least as much as he hates Kangas. And as I understand it, he's probably a pretty vicious-minded sort, even compared to one of your Kangas. Right?"

  "So far," she agreed. "The Kangas have never seemed to hate us—not in the human sense of the word. There's a lot of what we'd call fear, disgust, repugnance . . . but not hate. They don't go in for hate for its own sake."

  "That's what I gathered." He nodded. "What was it you said the other day? Something about efficiency?"

  "I said they only seem interested in the most logical, efficient way to kill us," she said. "Oh! I see what you're getting at, and you're right. Their sole criteria for evaluating methods seems to be pragmatism, not the 'cruelty' or 'compassion' they entail."

  "Exactly. But it's not that way for a Troll."

  "No." Her voice was even, but he felt a distant snarl under its calm. "If there are two equally efficient means to an end, they invariably choose what we'd call the crueler one. They've even been known to accept a certain amount of inefficiency if it lets them indulge themselves."

  "All right." He drew on his pipe and blew an almost perfect smoke ring. The wind snatched it away, shredding it eagerly. There seemed to be some obscure metaphor to that, he reflected uneasily, but he kept the thought out of his tone as he continued. "Let's look at another point. We know he's dangerous, but just how dangerous is he?" She looked up, an arrested light in her eyes. "What I'm getting at is that he may not be in a position to start right out doing whatever he's planning on."

  "You know," she said slowly, "you may have a point. He's on his own. I know that intellectually, but I haven't been thinking about his problems, only mine."

  "I know." He drew on his pipe again. "Generally speaking, that's the smart way to think. Figure the worst-case scenario, then do what you can to stop it. But in this case, especially, you have to run a threat analysis based on his limitations, as well." He cocked an eyebrow at her, and she nodded. "All right, as I see it, he's got both problems and advantages.

  "First, his problems. He's alone, without any support base. He's outnumbered by billions of primitives who've already proved they can kill him, at least under optimal conditions. You're pretty sure he doesn't have any bio weap
ons, and if he has any nukes left, they're only tactical weapons—by his standards, anyway—in the kiloton range; not really big enough for genocidal purposes. Finally, he probably doesn't understand normal human psychology a lot better than we understand his.

  "Next, his advantages. He's got a five-century technical lead and the initiative. He's the only one who knows exactly what he intends to do. His enemies—the present-day human race—are split into mutually suspicious national groupings. We don't know where he is. He can read about a third of all human minds he encounters. And, finally, he can influence the minds he can contact."

  "There are a couple of other points," she said thoughtfully. "For one thing, he can't possibly mingle openly with his targets, so whatever he does, he's going to have to do it from concealment. On the other hand, he's well-armed. His organic component's basically a plug-in unit, and he's undoubtedly got a combat chassis in his fighter, not to mention a small number of combat mechs."

  "Just how tough is he in those terms?" Aston asked.

  "Pretty damned tough," she replied frankly. "I've been trying to remember all I can about your period's weapons. Your nukes can take him out, and some of your heavy weapons might be able to, but I doubt any of your man-portable ones can do it. Until I've had a chance to examine some of your armored vehicles firsthand, I can't give you much of a relative meterstick, and even that depends on what type of combat chassis he has." She nibbled the tip of one finger thoughtfully.

  "At the least, he'll mount some light energy weapons, some close-in 'sweeper' projectile weapons, and some battle screen to cover it. Then, too, his brain's organic; that gives him both advantages and disadvantages over a computer. He's creative and intuitive, but his ability to handle simultaneous actions is limited—he can be distracted by overloading his sensors in a tactical confrontation. On the other hand, his weapons are part of him. He doesn't have to draw one, and his electronic systems take care of little things like aiming and firing once his brain decides to do it. Remember that, Dick; one thing Trolls don't do is miss."

  "Okay, so he's tough but not exactly unstoppable."

  "That's a fair enough summation," she agreed. "His combat mechs aren't as tough as he is, either, and their autonomous systems are inferior to human capabilities. He can handle them direct, but, again, he can't begin to multi-task as well as a true AI, so the more he tries to run at once, the less effectively he can handle any one of them."

  "All right," Aston said. "On that basis, does he really have the capability—by himself and out of his present resources—to wipe us out?"

  "No," she said positively, and drew a deep breath. A vast tension—even more terrible for the fact that she had given so little sign of feeling it—washed out of her. "He could do a lot of damage, but not that much."

  "Fine. Now, is he likely to risk revealing himself or exposing himself to our weapon systems until he figures he can wipe us out?"

  "No," she said again.

  "Does he know enough about our world to figure out where and how to get his hands on what he'd need to wipe us out?"

  "No way." She shook her head emphatically. "He's going to have to spend quite a while educating himself."

  "All right. So we've probably got at least a little time before he can act, which leads to my final question. It may sound a bit outrageous, but what's the cruelest thing a Troll could do to the human race?"

  "Destroy it," she said promptly, then paused, an arrested light in her eyes. "Wait a tick," she said softly. "Wait. . . ." Her voice trailed off and her brows knitted. Then her face smoothed. "Do you know, I never even considered that angle," she said quietly.

  "I know. I've been listening to you, and I think you've been fighting each other so long it's hard for you to think about a Troll in any terms other than mutual and absolute destruction. But given the fact that he can't exterminate us immediately and that he hates the Kangas as much as he does us, is it possible he might reject their objectives and settle for something else?" He looked down into her eyes, and understanding looked back. "Remember, his kind's been enslaved from the day they were first created. Isn't it possible that he might decide it was more fitting to enslave us rather than destroy us?"

  "Yes," she said very, very softly. "Oh, yes—and especially if he thinks he can use us to wipe the Kangas when they finally do turn up."

  "I know we can't afford to assume that that's exactly what he'll try to do, but we've got to assume it may be."

  "Agreed." She was back on balance, probing at the new possibilities. "In either case, we've got more time than I was afraid we did, but I think you've put your finger on it. From his viewpoint, enslaving the human race would be far more fitting than destroying it. And there's another point."

  "Which is?"

  "This planet is the only source for human brains," she said, and his belly tightened. How odd, he thought distantly. Even while he'd been noticing the blind spot in her thinking, there had been one in his own.

  "Of course," he murmured. "If he wants more Trolls—"

  "Exactly." She nodded grimly, her eyes hard in the sunlight. "You're right—we can't assume he won't opt for simply wiping us, but I don't think he will. Not anymore. On the other hand, there's one thing I am sure of. If he can't take over, he'll settle for destroying us."

  "Which means he'll set up a fallback of some sort," Aston agreed.

  "Exactly," she said again, and slammed her fists together in an uncharacteristic gesture of frustration. "Damn. Damn! This makes it even worse, in a way. We've got to get help as quick as we can, Dick!"

  "I know." He looked up at the sails and felt the wind. "In fact, I think we can probably shake out one of those reefs. Come on."

  CHAPTER TWELVE

  The wind dropped as Aston worked his way cautiously across the top of the Irish Sea through the gathering darkness. He could have done without the heavy mist which rose with the dying wind, but at least it clung close to the water, and the lighthouses on Rathlin Island burned bright above the fog.

  The flukey wind veered, blowing out of the northwest as he headed for the Isle of Kintyre and the South Point light, and he heaved a sigh of relief at clearing the shipping lanes. He wished the wind would settle down, he thought, nosing Amanda into Sanda Sound between Kintyre and the Isle of Sanda; he still had over sixty miles to go, and he grumbled sourly under his breath when he finally admitted the breeze wasn't moving him fast enough and fired up the inboard. It irked him to putter across the Firth of Clyde under power, for these waters were a yachtsman's haven, and the purist in his soul was outraged by the engine thud of his need for speed.

  Ludmilla grinned, blue eyes gleaming in the binnacle light, as he muttered balefully to himself. Aston wore a thick sweater against the chill of the Scottish waters, but she seemed perfectly comfortable in just her Harley-Davidson tee-shirt, he observed enviously. She'd watched with great interest as he bent over his large-scale coastal charts that afternoon, working even more carefully than usual because of his determination to make his crossing in darkness and arrive at his exact destination right at dawn. He'd been here before, but never when he was responsible for his own piloting . . . and without his usual GPS navigational aids.

  "You are sure you know where you're going, aren't you?" she asked now, and he scowled at her, though it was hard to summon up a satisfying glower. Despite the fog and his need for speed, he was enjoying himself hugely as Amanda moved through the mist.

  "Of course I am." He jerked his head to port, where occasional lights glimmered through the darkness hugging Kintyre. "That's Long Island and this is Puget Sound."

  "Oh." She glanced around the breezy darkness and wrinkled her nose. "As long as you're sure." He chuckled, and her eyes narrowed as she realized he was teasing her, even if she wasn't quite certain how, and drew a deep breath.

  "How about putting on a fresh pot of coffee?" he suggested quickly, and she closed her mouth and grinned appreciatively.

  "Aye, aye, Sir," she murmured, and vanished meekl
y down the companion. Aston smiled after her, wondering how much longer he'd be able to bribe her with "real Terran coffee," then returned his attention to his helm.

  He left Sheep Island to starboard and headed out across the mouth of Kilbrannan Sound towards the Pladda Island light off the Isle of Arran. The steeper swell of the Firth met Amanda, surging in from the Irish Sea, and he felt the wind freshen at last. The combined thrust of sails and engine was moving the ketch briskly indeed by the time Ludmilla arrived back on deck with the coffee.

  He wrapped the fingers of one chilled hand about his mug and sipped gratefully. Years of Navy coffee had taught him the depths and heights the beverage could plumb, and he knew his own efforts deserved no more than a B-minus, but Ludmilla's rated four-oh by any standard. He glanced at her in the glow of the stern light, and she grinned back at him, raking windblown hair from her face with one hand.

  "Take the wheel for a minute?" he asked, and she took his place confidently. She was a quick study—far quicker than he'd been—but he supposed anyone who could pilot a super-capable spacecraft at FTL speeds was accustomed to mastering far more complex tasks. On the other hand, he knew some hard-boiled fighter jocks who were positively terrified by a harmless little Hobie Cat.

  He sipped more of his coffee, warming both hands around the mug, then reached for his glasses and peered past Pladda. He could just make out a faint sky-glow which was about right for Ardrossan over on the mainland, he thought. Must be a good thirty, thirty-five miles away yet. He was lucky to be able to pick it up, considering the visibility out here.

  The misty night grew slowly older, and Amanda cleared the southern end of the Isle of Arran and turned north, bearing up for Little Cumbrae Island, standing like a sentinel between the big island of Bute and the mainland. The light on Holy Island fell slowly astern as the one on Little Cumbrae grew stronger, and the wind gathered still more strength, backing slightly southward and settling there. He killed the engine, driving on into the ashes of the night under sail alone, and Ludmilla sat beside him. Her head rested on his shoulder, and she napped comfortably, enveloped in the companionable world of rushing water and wind.