Anyway, she accessed some repository of her personal files, and brought up a photo of Joshua-never-Josh Wilkins. Given how attractive Mrs. Wilkins was, he wasn't what I expected. He had cold, gray eyes, hair buzzed so short as to be nonexistent, and a thin, almost lipless mouth; the overall effect was reptilian. “That's before,” I said. “What about after? What's he look like now that he's transferred?”

“Umm, pretty much the same,” she said.

“Really?” If I'd had that kisser, I'd have modified it for sure. “Do you have pictures taken since he moved his mind?”

“No actual pictures,” said Cassandra. “After all, he and I only just transferred. But I can go into the NewYou database, and show you the plans from which his new face was manufactured.” She spoke to the terminal some more, and then typed in another lengthy passphrase. Soon enough, she had a computer-graphics rendition of Joshua's head on my screen.

“You're right,” I said, surprised. “He didn't change a thing. Can I get copies of all this?”

She nodded, and spoke some more commands, transferring various documents into local storage.

“All right,” I said. “My fee is two hundred solars an hour.”

“That's fine, that's fine, of course! I don't care about the money, Mr. Lomax — not at all. I just want Joshua back. Please tell me you'll find him.”

“I will,” I said, smiling my most reassuring smile. “Don't you worry about that. He can't have gone far.”

Actually, of course, Joshua Wilkins could perhaps have gone quite far — so my first order of business was to eliminate that possibility.

No spaceships had left Mars in the last ten days, so he couldn't be off-planet. There was a giant airlock in the south through which large spaceships could be brought inside for dry-dock work, but it hadn't been cracked open in weeks. And, although a transfer could exist freely on the Martian surface, there were only four personnel air locks leading out of the dome, and they all had security guards. I visited each of those air locks and checked, just to be sure, but the only people who had gone out in the last three days were the usual crowds of hapless fossil hunters, and every one of them had returned when the dust storm began.

I remember when this town had started up: “The Great Fossil Rush,” they called it. Weingarten and O'Reilly, two early private explorers who had come here at their own expense, had found the first fossils on Mars, and had made a fortune selling them back on Earth. More valuable than any precious metal; rarer than anything else in the solar system — actual evidence of extraterrestrial life! Good fist-sized specimens went for millions in online auctions; excellent football-sized ones for billions. There was no greater status symbol than to own the petrified remains of a Martian pentaped or rhizomorph.

Of course, Weingarten and O'Reilly wouldn't say precisely where they'd found their specimens, but it had been easy enough to prove that their spaceship had landed here, in the Isidis Planitia basin. Other treasure hunters started coming, and New Klondike — the one and only town on Mars — was born.

Native life was never widely dispersed on Mars; the single ecosystem that had ever existed here seemed to have been confined to an area not much bigger than Rhode Island. Some of the prospectors — excuse me, fossil hunters — who came shortly after W O's first expedition found a few nice specimens, although most had been badly blasted by blowing sand.

Somewhere, though, was the mother lode: a bed that produced fossils more finely preserved than even those from Earth's famed Burgess Shale. Weingarten and O'Reilly had known where it was — they'd stumbled on it by pure dumb luck, apparently. But they'd both been killed when their heat shield separated from their lander when re-entering Earth's atmosphere after their third expedition here — and, in the twenty mears since, no one had yet rediscovered it.

People were still looking, of course. There'd always been a market for transferring consciousness; the potentially infinite lifespan was hugely appealing. But here on Mars, the demand was particularly brisk, since artificial bodies could spend days or even weeks on the surface, searching for paleontological gold, without worrying about running out of air. Of course, a serious sandstorm could blast the synthetic flesh from metal bones, and scour those bones until they were whittled to nothing; that's why no one was outside right now.

Anyway, Joshua-never-Josh Wilkins was clearly not outside the dome, and he hadn't taken off in a spaceship. Wherever he was hiding, it was somewhere in New Klondike. I can't say he was breathing the same air I was, because he wasn't breathing at all. But he was here , somewhere. All I had to do was find him.

I didn't want to duplicate the efforts of the police, although “efforts” was usually too generous a term to apply to the work of the local constabulary; “cursory attempts” probably was closer to the truth, if I knew Mac.

New Klondike had twelve radial roadways, cutting across the nine concentric rings of buildings under the dome. My office was at dome's edge; I could have taken a hovertram into the center, but I preferred to walk. A good detective knew what was happening on the streets, and the hovertrams, dilapidated though they were, sped by too fast for that.

I didn't make any bones about staring at the transfers I saw along the way. They ranged in style from really sophisticated models, like Cassandra Wilkins, to things only a step up from the tin woodsman of Oz. Of course, those who'd contented themselves with second-rate synthetic forms doubtless believed they'd trade up when they eventually happened upon some decent specimens. Poor saps; no one had found truly spectacular remains for mears, and lots of people were giving up and going back to Earth, if they could afford the passage, or were settling in to lives of, as Thoreau would have it, quiet desperation, their dreams as dead as the fossils they'd never found.

I continued walking easily along; Mars gravity is about a third of Earth's. Some people were stuck here because they'd let their muscles atrophy; they'd never be able to hack a full gee again. Me, I was stuck here for other reasons, but I worked out more than most — Gully's Gym, over by the shipyards — and so still had reasonably strong legs; I could walk comfortably all day if I had to.

The cop shop was a five-story building — it could be that tall, this near the center of the dome — with walls that had once been white, but were now a grimy grayish pink. The front doors were clear alloquartz, same as the overhead dome, and they slid aside as I walked up to them. At the side of the lobby was a long red desk — as if we don't see enough red on Mars — with a map showing the Isidis Planitia basin; New Klondike was a big circle off to one side.

The desk sergeant was a flabby lowbrow named Huxley, whose uniform always seemed a size too small for him. “Hey, Hux,” I said, walking over. “Is Mac in?”

Huxley consulted a monitor, then nodded. “Yeah, he's in, but he don't see just anyone.”

“I'm not just anyone, Hux. I'm the guy who picks up the pieces after you clowns bungle things.”

Huxley frowned, trying to think of a rejoinder. “Yeah, well…” he said, at last.

“Oooh,” I said. “Good one, Hux! Way to put me in my place.”

He narrowed his eyes. “You ain't as funny as you think you are, Lomax,” he said.

“Of course I'm not,” I said. “Nobody could be that funny. I nodded at the secured inner door. “Going to buzz me through?”

“Only to be rid of you,” said Huxley. So pleased was he with the wit of this remark that he repeated it: “Only to be rid of you.”

Huxley reached below the counter, and the inner door — an unmarked black panel — slid aside. I pantomimed tipping a nonexistent hat at Hux, and headed into the station proper. I then walked down the corridor to McCrae's office; the door was open, so I rapped my knuckles against the plastic jamb.