LITMIR.BIZ

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to a parking garage. Art drove his rover right at this hole—the Beast was moving at three kilometres a day, so it was no trick to hit it—and once inside, he drove up a curving ramp, following a short tunnel into a lock. There he spoke by radio to the Beast’s AI, and doors behind his rover slid shut, and in a minute he could simply get out of his car, and go over to an elevator door, and take an elevator up to the observation deck.

      It did not take long to realise that life inside the Beast was not the essence of excitement, and after checking in with the Sheffield office, and taking a look at the ion chromatograph down in the lab, Art went back out in the rover to have a more extensive look around. This was the way things went when working the Beast, Zafir assured him; the rovers were like pilot fishes swimming around a great whale, and though the view from the observation deck was nice and high, most people ended up spending a good part of their days out driving around.

      So Art did that. The fallen cable out in front of the Beast showed clearly how much harder it had been coming down here than it had back at the start of its fall. Here it was buried to perhaps a third of its diameter, and the cylinder was flattened, and marked by long cracks running along its sides, revealing its structure which consisted of bundles of bundles of carbon nanotube filament, still one of the strongest substances known to materials science, though apparently the current elevator’s cable material was stronger yet.

      The Beast straddled this wreckage, about four times as tall as the cable; the charred black semi-cylinder disappeared into a hole at the front end of the Beast, from which came a grumbling, low, nearly subsonic vibration. And then, every day at about two in the afternoon, a door at the back of the Beast slid open over the tracks always being excreted from the back end of the Beast, and one of the diamond-capped train cars would roll out and glide off toward Pavonis, winking in the sunlight. The trains disappeared over the high eastern horizon (into the apparent “depression” now between him and Pavonis) about ten minutes after emerging from their maker.

      After viewing the daily departure, Art would take a drive in the pilot fish rover, investigating craters and big isolated boulders, and, frankly, looking for Nirgal, or rather waiting for him. After a few days of this, he added the habit of suiting up, and taking a walk outside for a few hours every afternoon, strolling beside the cable or the pilot fish, or hiking out into the surrounding countryside.

      It was odd-looking terrain, not only because of the even distribution of millions of black rocks, but because the hard blanket of firn had been sculptured into fantastic shapes by the sand-blaster winds: ridges, boles, hollows, tear-shaped tailings behind every exposed rock, etc. Sastrugi, they were called. It was fun to walk around among these extravagant aerodynamic extrusions of reddish snow.

      Day after day he did this. The Beast ground slowly westward. He found that the windswept bare tops of the rocks were often coloured by tiny flakes that were scales of fast lichen, a kind that grew quickly, or at least quickly for lichen. Art picked up a couple of sample rocks, and took them back into the Beast, and read about the lichen curiously. These apparently were engineered cryptoendolithic lichens, and at this altitude they were living right at the edge of the possible—the article on them said that over ninety-eight percent of their energy was used simply to stay alive, with less than two percent going toward reproduction. And this was a big improvement over the Terran template species.

      More days passed, then weeks; but what could he do? He kept on collecting lichen. One of the cryptoendoliths he found was the first species to survive on the Martian surface, the lectern said, and it had been designed by members of the fabled First Hundred. He broke apart some rocks to have a better look, and found bands of the lichen growing in the rocks’ outer centimetre: first a yellow stripe right at the surface, then a blue stripe under that, then a green one. After that discovery he often stopped on his walks to kneel and put his faceplate to coloured rocks sticking up out of the firn, marvelling at the crusty scales and their intense pale colours—yellows, olives, khaki greens, forest greens, blacks, greys.

      One afternoon he drove the pilot fish far to the north of the Beast, and got out to hike around and collect samples. When he returned, he found that the lock door in the side of the pilot fish would not open. “What the hell?” he said aloud.

      It had been so long that he had forgotten that something was supposed to happen. The happening had taken the form of some kind of electronic failure, apparently. Assuming this was the happening, and not … something else. He called in over the intercom, and tried every code he knew on the keypad by the lock door, but nothing had any effect. And since he couldn’t get back in, he couldn’t turn on the emergency systems. And his helmet’s intercom had a very limited range—the horizon, in effect—which down here off Pavonis had shrunk to a Martian closeness, only a few kilometres away in all directions. The Beast was well over the horizon, and though he could probably walk to it, there would be a section of the hike where both Beast and pilot fish would be over the horizon, and himself alone in a suit, with a limited air supply …

      Suddenly the landscape with its dirty sastrugi took on an alien, ominous cast, dark even in the bright sunshine. “Well hell,” Art said, thinking hard. He was out here, after all, to get picked up by the underground. Nirgal had said it was going to look like an accident. Of course this was not necessarily that accident, but whether it was or it wasn’t, panic was not going to help. Best to make the working assumption that it was a real problem, and go from there. He could try walking back to the Beast, or he could try getting into the pilot fish rover.

      He was still thinking things over, and typing at the keypad of the lock door like a champion speed-typist, when he was tapped hard on the shoulder. “Aaa!” he shouted, leaping around.

      There were two of them, in walkers and scratched old helmets. Through their faceplates he could see them: a woman with a face like a hawk’s, who looked as if she would be happy to bite him; and a short thin-faced black man, with grey dreadlocks crowding the border of his faceplate, like the rope picture frames one sometimes saw in nautical restaurants.

      It was the man who had tapped Art on the shoulder. Now he lifted three fingers, pointing at his wrist console. The intercom band they were using, no doubt. Art switched it on. “Hey!” he cried, feeling more relieved than he ought to, considering that this was probably Nirgal’s set-up, so that he had never been in danger. “Hey, I seem to be locked out of my car? Could you give me a lift?”

      They stared at him.

      The man’s laugh was scary. “Welcome to Mars,” he said.

       PART THREE Long Runout

       Ann Clayborne was driving down the Geneva Spur, stopping every few switchbacks to get out and take samples from the roadcuts. The Transmarineris Highway had been abandoned after ’61, as it now disappeared under the dirty river of ice and boulders covering the floor of Coprates Chasma. The road was an archaeological relic, a dead end.

       But Ann was studying the Geneva Spur. The Spur was the final extension of a much longer lava dike, most of which was buried in the plateau to the south. The dike was one of several—the nearby Melas Dorsa, the Felis Dorsa farther east, the Solis Dorsa farther west—all of them roughly parallel, all perpendicular to the Marineris canyons, and all mysterious in their origin. But as the southern wall of Melas Chasma had receded, by collapse and eolian removal, the hard rock of one dike had been exposed, and this was the one named the Geneva Spur, which had provided the Swiss with a perfect ramp to get their road down the canyon wall, and was now providing Ann with a nicely exposed dike base. It was possible that it and all its companion dikes had been formed by concentric fissuring resulting from the rise of Tharsis; but they could also be much older, remnants of a basin-and-range type spread in the earliest Noachian, when the planet was still expanding from its own internal heat. Dating the basalt at the foot of the dike would help answer the question one way or the other.

       So she drove a little boulder car slowly down the frost-covered road. The car would be quite visible from space, but she didn’t care. She had driven all

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