“So I understand,” Art said. He had done work with ion chro-matography during analyses in Georgia, and this was his ostensible reason for being sent into the outback. So over the next few days Zafir and some Beast technicians trained Art in dealing with the Beast, and after these sessions they had dinner together at a small restaurant in the suburb tent on the east rim. After sunset they had a great view of Sheffield, some thirty kilometers around the curve of the rim, glowing in the twilight like a lamp perched on the black abyss.

As they ate and drank, the conversation seldom turned to the matter of Art’s project, and, considering it, Art decided that this was probably a deliberate courtesy on his colleagues’ part. The Beast was fully self-operating, and though there were some problems to be solved in sorting out the recently discovered full fullerenes, there must have been local ion chromatographers who could have done the job. So there was no obvious reason why Praxis should have sent Art up from Earth to do it, and there had to be something more to his story. And so the group avoided the topic, saving Art the embarrassment of lies, or awkward shrugs, or an explicit appeal to confidentiality.

Art would have been uncomfortable with any of these dodges, so he appreciated their tact. But it put a certain distance in their conversations. And he seldom saw the other Praxis newcomers, outside of orientation meetings; and he didn’t know anyone else in town, or elsewhere on the planet. So he was a little lonely, and the days passed in an increasing sense of uneasiness, even oppression. He kept the drapes closed on his window view, and ate in restaurants away from the rim. It began to feel a bit too much like the weeks on the Ganesh, which he now understood to have been a miserable time. Sometimes he had to fend off the feeling that it had been a mistake to come.

And so after their last orientation lecture, at a reception luncheon in the Praxis building, he drank more than was his custom, and took a few inhalations from a tall canister of nitrous oxide. Inhalation of recreational drags was a local custom, fairly big among Martian construction workers, he had been told, and there were even little canisters of various gases for sale from dispensers in some public men’s rooms. Certainly the nitrous added a certain extra bubbly quality to the champagne; it was a nice combination, like peanuts and beer, or ice cream and apple pie.

Afterward he walked down the streets of Sheffield bouncing erratically, feeling the nitrous champagne as a kind of antigravita-tional effect, which, added to the Martian baseline, made him feel altogether too light. Technically he weighed about forty kilos, but as he walked along it felt more like five. Very strange, even unpleasant. Like walking on buttered glass.

He nearly ran into a young man, slightly taller than him — a black-haired youth, as slender as a bird and as graceful, who quickly veered away from him and then steadied him with a hand to his shoulder, all in one smooth flow of movement.

The youth looked him in the eye. “Are you Arthur Randolph?”

“Yes,” Art said, surprised. “I am. And who are you?”

“I’m the one who contacted William Fort,” the young man said.

Art stopped abruptly, swaying to get back over his feet. The young man held him upright with a gentle pressure, his hand hot on Art’s upper arm. He regarded Art with a direct look, a friendly smile. Perhaps twenty-five, Art judged, perhaps younger — a handsome youth with brown skin and thick black eyebrows, and eyes that were slightly Asian, set wide over prominent cheekbones. An intelligent look, full of curiosity and a kind of magnetic quality, hard to pin down.

Art took to him instantly, for no reason he could tell. It was just a feeling. “Call me Art,” he said.

“And I am Nirgal,” the youth said. “Let’s go down to Overlook Park.”

So Art walked with him down the grassy boulevard to,the park on the rim. There they strolled the path next to the coping wall, Nirgal helping Art with his drunken turns by frankly seizing his upper arm and steering him. His grasp had an electric penetrating quality to it, and was really very warm, as if the youth had a fever, though there was no sign of it in his dark eyes.

“Why are you here?” Nirgal asked — and his voice, and the look on his face, made the question into something other than a superficial inquiry. Art checked his response, thought about it.

“To help,” he said.

“So you will join us?”

Again the youth somehow made it clear that he meant something different, something fundamental.

And Art said, “Yes. Anytime you like.”

Nirgal smiled, a quick delighted grin that he only partly overmastered before he said, “Good. Very good. But look, I’m doing this on my own. Do you understand? There are people who wouldn’t approve. So I want to slip you in among us, as if it were an accident. That’s okay with you?”

“That’s fine.” Art shook his head, confused. “That’s how I was planning on doing it anyway.”

Nirgal stopped by the observation bubble, took Art’s hand and held it. His gaze, so open and unflinching, was contact of another kind. “Good. Thanks. Just keep doing what you’re doing, then. Go out on your salvage project, and you’ll be picked up out there. We’ll meet again after that.”

And he was off, walking across the park in the direction of the trr.m station, moving with the long graceful lope that all the young natives seemed to have. Art stared after him, trying to remember everything about the encounter, trying to put his finger on what had made it so charged. Simply the look on the youth’s face, he decided — not just the unself-conscious intensity one sometimes saw on the faces of the young, but more — some humorous power. Art remembered the sudden grin unleashed when Art had said (had promised) that he would join them. Art grinned himself.

When he got back to his room, he walked right to the window and opened the drapes. He went over to the table by his bed, and sat and turned on his lectern, and looked up Nirgal. No person listed by that name. There was a Nirgal Vallis, between Argyre Basin and Valles Marineris. One of the best examples of a water-carved channel on the planet, the entry said, long and sinuous. The word was the Babylonian name for Mars.

Art went back to the window and pressed his nose against the glass. He looked right down the throat of the thing, into the rocky heart of the monster itself. Horizontal banding of the curved walls, the broad round plain so far below, the sharp edge where it met the circular wall — the infinite shadings of maroon, rust, black, tan, orange, yellow, red — everywhere red, all the variations of red… He drank it in, for the first time unafraid. And as he looked down this enormous coring into the planet, a new feeling leaped into him to replace the fear, and he shivered and hopped in place, in a little dance. He could handle the view. He could handle the gravity. He had met a Martian, a member of the underground, a youth with a strange charisma, and he would be seeing more of him, more of all of them… He was on Mars.

And a few days later he was on the west slope of Pavonis Mons, driving a small rover down a narrow road that paralleled a band of disturbed volcanic rubble, with what looked like a cog railway track running right down it. He had sent a final coded message to Fort, telling him that he was taking off, and had gotten the only reply of his journey so far: Have a nice trip.

The first hour of his drive held what everyone had told him would be its most spectacular sight: going over the western rim of the caldera, and starting down the outer slope of the vast volcano. This occurred about sixty kilometers west of Sheffield. He drove over the southwest edge of the vast rim plateau, and started downhill, and a horizon appeared very far below, and very far away — a slightly curved hazy white bar, like the view of Earth as seen from a space plane’s window — which made sense, as the peak of Pavonis was about eighty-five thousand feet above Amazonis Planitia. So it was a huge view, the most forcible reminder possible of the stupendous height of the Tharsis volcanoes. And he had a great view of Arsia Mons at that moment, in fact, the southernmost of the three volcanoes lined up on Tharsis, bulking over the horizon to his left like a neighboring world. And what looked like a black cloud, over the far horizon to the northwest, could very possibly be Olympus Mons itself!