Transvergence

by Charles Sheffield

  "What?" That was Louis Nenda. It was nice to know that he did not understand any better than Rebka.

  "The configuration is that of the Indulgence—Dulcimer's ship. And it is an uncommon design. I would like to suggest a theory, consistent with all the facts. Those of our party left behind on the Erebus must have received the message drone describing a safe path through the singularities, and decided to follow us here. They located the seedship by a remote scan of the planetary surface, and sent the Indulgence to land near it. But there was no sign of us, and no indication of where we had gone or when we might come back. Therefore they kept one or two individuals on Dulcimer's ship, with its heavy weapons, waiting for our possible return, and the rest returned to space in the unarmed seedship, safe from the Zardalu. If this analysis is correct, one or two members of our party now wait for us in the Indulgence. And the Erebus itself waits in orbit about Genizee."

  Kallik's explanation was neat, logical, and complete. Like most such explanations, it was, in Hans Rebka's view, almost certainly wrong. That was not the way the real world operated.

  But at that point theory had little role to play in what they had to do next. That would be decided by facts, and certain facts were undeniable. Day was approaching—the first hint of light was already in the sky. They dared not remain on the surface of Genizee, at least not close to the shoreline, once the sun rose and the Zardalu became active. And the most important fact of all: there was a ship just a few hundred yards away. How it got there, or who was on it, was of much less importance than its existence.

  "We can all compare theories—once we're safe in space." Rebka peered around him. He could at last distinguish rock outcrops from lightening sky. In a few minutes he and Louis Nenda would be able to walk or run without killing themselves. But by that time he wanted to be close to the ship. "I know it will be rough going across the rocks, but we have to try it even while it's still dark. I want Atvar H'sial and Kallik to guide Nenda and me. Tell us where to put our feet—set them down for us if you have to. Remember, we have to be as quiet as we can, so don't take us through any patches of rubble, or places where we might knock stones loose. But we have to get to where the moss and mud begins before it's really light."

  The predawn wind was dying, and the sound of waves on the shore had vanished. Hans Rebka moved through an absolute silence, where every tiny clink of a pebble sounded like thunder and a dislodged handful of earth was like an avalanche. He had to remind himself that human ears, at least, would not detect him more than a few feet away.

  And finally they were at a point where the amount of noise they made did not matter. The gray-green moss lay level before them, soft and fuzzy against the brightening sky. All that remained was a dash across it to the ship, a couple of hundred yards away.

  Rebka turned to the Hymenopt, who, even with one injured leg, was four times as fast as any human. "Kallik, when you reach the hatch, you go right in, leave it open, and ready the ship for takeoff. Don't get into a discussion or an argument with anyone on board—we'll have time for that later. By the time I'm there, I want us ready to lift. All right?" The Hymenopt nodded. "Then go."

  Kallik was a dark moving streak against the flat mossy surface, her legs an invisible blur. Atvar H'sial, surprisingly fast for her bulk, was not far behind. The Cecropian covered the ground in a series of long, gliding leaps that took her smoothly up to and inside the hatch. Louis Nenda was third, his stocky body capable of real speed over short distances. Rebka was catching up with him on the final forty meters, but Nenda was through the hatch a couple of yards ahead.

  Rebka jumped after him, turned as his foot skidded across the threshold, and slammed the hatch closed. "All in," he shouted. "Kallik, take us up."

  He swung around to see what was happening. It had occurred to him, in the final seconds of the dash across the moss, that there was one real possibility that he had refused to consider because it had final and fatal implications. What if the Indulgence had somehow been captured by the Zardalu, and they were waiting inside?

  Breathe again. There were no signs of Zardalu—the cabin was empty except for the four new arrivals. "Kallik, bring us to a hover at three hundred meters. I want to look for Zardalu."

  But the little Hymenopt was pointing at the control display where multiple lights were flashing. "Emergency signal, Captain Rebka. Not for this ship."

  Rebka was across to the console in a couple of steps, scanning the panel. "It's the Erebus! In synchronous orbit. Take us right up there, Kallik. Graves should have stayed outside the singularities. What sort of trouble is he in now?"

  The hover command was aborted and the rapid ascent began. All eyes were on the display of the dark bulk of the Erebus, orbiting high above them. No one took any notice of the downward scope. No one saw the dwarfed image of Darya Lang, capering and screaming on the sunlit surface far below.

  Chapter Twenty

  Darya was learning the hard way. There was no way of knowing just how much discomfort and fatigue a person could stand, until she had no choice.

  The irritating little black bugs that crawled into her eyes, nose, and ears were nothing. Limbs that cried out with fatigue were nothing. Hunger and thirst were nothing. All that mattered was the disappearance of the Indulgence, the only escape from the surface of Genizee.

  As the sun rose higher she sat down on a flat stone, filled with despair that changed little by little to annoyance and then at last to rage. Someone—someone of her own party, not a Zardalu—had stolen the ship, just a couple of minutes before she and Tally were ready to board it. Now they were hopelessly stranded.

  Who could have done it? And finally, with that thought, Darya's head cleared. The answer was obvious: the survivors, whoever they were, of the first group that had flown down to the surface of Genizee. They had arrived on the seedship, but it had not been there when they wanted to leave. With that gone, they must have seen the Indulgence as their only way off the surface. But if that was so, once they realized that they had left people behind on Genizee, surely they would return. Hans Rebka would come for her. So would Louis Nenda. She was absolutely sure of it.

  The problem—and it was a big one—was to be alive and free when that return took place. And one way that would certainly not work was to remain on the surface. When she peeked over the sheltering line of vegetation between her and the shore she could see the water bubbling with activity. Now and then a great blue head would break the surface. The Zardalu might not like the rocky, broken terrain where she and Tally were hiding as much as they liked the sea and shoreline, but by now they would have realized that the escaped prisoners had taken to the air ducts. It would surely not be more than another hour or two before a systematic examination of the surface vents began.

  She rubbed flies from the corners of her eyes and crawled across to where E.C. Tally was sitting in front of a little bush bearing fat yellow leaves.

  "E.C., we have to go back. Back into the ducts."

  "Indeed? We went to considerable trouble to remove ourselves from them."

  "The ship will come back for us"—she told herself she believed that, she had to believe it—"but we can't survive on the surface while we wait."

  "I am inclined to disagree. May I speak?" Tally raised a bunch of the yellow leaves, each bloated at its extremity to a half-inch wrinkled sphere. "These are not good in taste to a human palate, but they will sustain life. They are high in water content, and they have some food value."

  "They might be poisonous."

  "But they are not—I already consumed a number." A considerable number, now that Darya's attention had been drawn to it. While she had been sitting and thinking, two or three bushes in the little depression had been denuded of foliage and berries.

  "And although I am an embodied computer," Tally went on, "and not a true human, the immune system and toxin reactions of this body are no different from yours. I have suffered no adverse effects, and I am sure you will also feel none."

  Logic tol
d Darya that Tally could be quite wrong. He had direct control over elements of his immune system, where she did not, and the body used for his incorporation had been carefully chosen to have as few allergic reactions as possible. But while her mind was telling her that, her hands were grabbing for a branch of the bush and plucking off berries.

  Tally was right. Too tart and astringent to be pleasant, but full of water. The juice trickled down her dry throat like nectar when she crunched a berry between her teeth. She did the same to a dozen more before she could force herself to stop and speak again. "I wasn't thinking of food when I said we couldn't stay here. I was thinking of Zardalu."

  The embodied computer did not reply, but he raised himself slowly from a sitting position, until he was able to look out toward the shore. "I see nothing. If any are close-by, they are still in the water."

  "Do you want to bet on their staying there? The air vent we came up is more than a mile from here and we don't know of a nearer one. If the Zardalu came out of the sea farther along the shore, between us and the vent, it would be all over. We have to get back there."

  Tally was already pulling whole branches off the bushes. Darya began to do the same, eating more leaves and berries as she did so. Tally had the right idea. On the surface or under it, the two of them would still need nourishment. There might be bushes closer to the vent, but they could not take the risk. Collection had to be done now, even though it meant an added burden. She broke off branches until she had an armload. She would need the other arm free to help her over rough spots. She nodded to Tally. "Let's go."

  The trip to the air-duct exit was surprisingly easy and quick—good light made all the difference over broken ground. And the light was more than good—it was blinding. Darya paused a few times to wipe sweat from her face and neck. Here was another reason why the surface might be intolerable. Genizee close to noon promised to be incredibly hot. She turned and went uphill, far enough to peer uneasily at the shore over the ragged line of plants. The water was calm. No towering forms of midnight blue rose to fill her with terror. Did the Zardalu keep fixed hours, for water and land living? She knew so little about them, or about this planet.

  As they came close to the vent Darya noticed what she had not seen in the half-light of dawn: the whole region was covered with low bushes, similar to the ones whose branches they were carrying but with fruit of a slightly lighter shade of yellow. She broke off half-a-dozen more branches and added them to her load, popping berries into her mouth as she did so to quench her increasing thirst. These seemed a little sweeter, a little less inclined to fur her teeth and palate. Maybe the fruit was an acquired taste; or maybe these new berries were a fraction riper.

  At the vent itself Darya hesitated. The aperture was dark and uninviting, heading off at a steep angle into the rocky ground. Its only virtue was its narrow width, barely enough for a human and far too small to admit an adult Zardalu. But it represented safety . . . if one were willing to accept an unconventional definition of that word.

  "Come on, E.C. No point in hanging around." She led the way, wondering what to do next. They did not want to be too far below-ground in case the ship came back. But they also had to reach a certain depth, to be sure that groping Zardalu tentacles could not pull them out.

  What they really needed—the thought struck her as she took her first steps down—was a vent closer to the place where the Indulgence had rested. One of the only sure things in this whole mess was that anyone who came back for her would try to land at the same point where they had taken off.

  "E.C., do you remember all the turns and twists we made on the way up?"

  "Of course."

  "Then I want you to review the last few branch points before we came out on the surface, and see if any of the alternative paths that we didn't take might lead to an exit duct closer to where the Indulgence lay."

  "I did that long ago. If the directions of the ducts at those branch points were to continue as we saw them, then a duct at an intersection before the final one would run to the surface about a hundred yards inland from where we watched the Indulgence take off. A little more than a mile from here."

  Darya swore to herself. People could say what they liked about how smart embodied computers were, but something fundamental was missing. E.C. Tally must have had that information hours before; it had not occurred to him that it was important enough to pass on at once to Darya.

  Well, use the resources you have. Don't waste time pining for ones denied to you. That was one of Hans Rebka's prime rules. And E.C. Tally's memory was, so far as Darya could tell, infallible. "Lead the way back to that intersection. Let's see where it takes us."

  Tally nodded and went forward without a word. Darya followed, one arm full of laden branches, eating from them as they walked. The descent was far easier than their ascent. At this time of day the sun's rays lay close to the line of the entrance, so that the glassy walls of the tunnel served as a light trap, funneling sunlight deep below-ground. Even a couple of hundred feet down, there was ample light to see by.

  That was when they came to the first complication.

  Tally paused and turned. "May I speak?"

  But he did not need to. Darya saw the problem at once. The tunnel widened at that point to a substantial chamber, with one downward and three upward exits. Each would admit a human. But one of those upward corridors was more than wide enough for an adult Zardalu. If they went beyond this point and found no other exit, their one road back to the surface could be blocked.

  "I think we have to take the risk," Darya started to say. And then the second complication arrived. She felt a spasm across her middle, as though someone had taken her intestines and pulled them into a tight, stretching knot. She gasped. Her legs would not support her weight, and she slid forward to sit down suddenly and hard on the chamber floor.

  "Tally!" she said, and then could not get out another word. A second cramp, harder than the first, twisted her innards. Sweat burst out onto her forehead. She hung her head forward and panted, widemouthed.

  E.C. Tally came to her side and lifted her head. He raised her eyelid with his finger, then moved her lips back to peer at her gums.

  "Tally," she said again. It was the only sound she could make. The spasms inside her were great tidal waves of pain. As each one receded, it washed away more of her strength.

  "Unfortunate," Tally said quietly. She struggled to focus her eyes and see what he was doing. The embodied computer had picked up a branch of the bush that she had dropped and was examining it closely. "It is almost the same as the first one, but almost certainly a different species." He squeezed a pale yellow berry in his fingers and touched it carefully to his tongue. After a moment he nodded. "I think so. Similar, but also different. A medium-strength emetic in this, plus an unfamiliar alkaloid. I do not believe that this is a fatal poison, but it would, I think, be a good idea if you were to vomit. Do you have any way of inducing yourself to do so?"

  Darya was half-a-second ahead of him. Every berry that she had eaten came out in one awful, clenching spasm of her stomach and esophagus. And then, although the leaves and berries were surely all gone, her stomach did not know when to quit. She was racked by a continuing sequence of painful dry heaves, doubly unpleasant because there was nothing inside her for them to work on. She supported herself on the chamber floor with both hands and sat hunched in utter misery. Being so sick was bad enough. Being so stupid was even worse.

  "May I speak?"

  It was a few seconds before she could even nod, head down.

  "You should not seek to continue at this time, even if you feel able to do so. And it is surely unnecessary. You can wait here, and I will proceed to explore the tunnel system. Upon my return, we can decide on the next best course of action. Do you agree?"

  Darya was trying to throw up what was not there. She made another series of dreadful sounds, then produced a minuscule up-and-down motion of her head.

  "Very good. And in case you become thirsty again w
hile I am gone, I will leave these with you."

  Tally placed the fronds of leaves and berries that he had carried down the tunnel on the floor beside Darya. She gave them a look of hatred. She would not bite one more of those berries to save her life. And it needed saving. As Tally went away across the wide chamber, she fought off another agonizing fit of retching.

  She lay forward with her head on the cool glassy floor of the chamber, closed her eyes, and waited. If the Zardalu came along and caught her, that was just too bad. The way she was feeling, if she was killed now it would be a pleasant release.

  And it was all her own fault, a consequence of her sheltered upbringing on the safe garden planet of Sentinel Gate. No one else on the whole expedition would have been stupid enough to eat—to guzzle—untested foods.

  And no one else on the expedition would give up so easily. To come so far, and then to stop trying. It would not do. If somehow she survived this, she would never be able to look Hans Rebka in the eye again. Darya sighed and lifted her face away from the floor, straightening her arms to support her. She made a supreme effort and forced herself to crawl forward on hands and knees, until she was out of the chamber and ten yards into the narrowest of the ducts. Then she had to stop. The clenching agony in her stomach was fading, but her feet felt cold and her hands and forehead were damp and clammy.