"Okay," Hiro said, "that's your minute." I checked my watch; it was more like three minutes.

"Good luck, baby," she said softly, pretending to be intent on her cigarette. "Godspeed."

The promise of pain. It's there each time. You know what will happen, but you don't know when, or exactly how. You try to hold on to them; you rock them in the dark. But if you brace for the pain, you can't function. That poem Hiro quotes, Teach us to care and not to care.

We're like intelligent houseflies wandering through an international airport; some of us actually manage to blunder onto flights to London or Rio, maybe even survive the trip and make it back. "Hey," say the other flies, "what's happening on the other side of that door? What do they know that we don't?" At the edge of the Highway every human language unravels in your hands except, perhaps, the language of the shaman, of the cabalist, the language of the mystic intent on mapping hierarchies of demons, angels, saints.

But the Highway is governed by rules, and we've learned a few of them. That gives us something to cling to.

Rule One: One entity per ride; no teams, no couples.

Rule Two: No artificial intelligences; whatever's Out there won't stop for a smart machine, at least not the kind we know how to build.

Rule Three: Recording instruments are a waste of space; they always come back blank.

Dozens of new schools of physics have sprung up in Saint Olga's wake, ever more bizarre and more elegant heresies, each one hoping to shoulder its way to the inside track. One by one, they all fall down. In the whispering quiet of Heaven's nights, you imagine you can hear the paradigms shatter, shards of theory tinkling into brilliant dust as the lifework of some corporate think tank is reduced to the tersest historical footnote, and all in the time it takes your damaged traveler to mutter some fragment in the dark. not Flies in an airport, hitching rides. Flies are advised to ask too many questions; flies are advised not to try for the Big Picture. Repeated attempts in that direction invariably lead to the slow, relentless flowering of paranoia, your mind projecting huge, dark patterns on the walls of night, patterns that have a way of solidifying, becoming madness, becoming religion. Smart flies stick with Black Box theory; Black Box is the sanctioned metaphor, the Highway remaining x in every sane equation. We aren't supposed to worry about what the Highway is, or who put it there. Instead, we concentrate on what we put into the Box and what we get back out of it. There are things we send down the Highway (a woman named Olga, her ship, so many more who've followed) and things that come to us (a madwoman, a seashell, artifacts, fragments of alien technologies). The Black Box theorists assure us that our primary concern is to optimize this exchange. We're out here to see that our species gets its money's worth. Still, certain things become increasingly evident; one of them is that we aren't the only flies who've found their way into an airport. We've collected artifacts from at least half a dozen wildly divergent cultures. "More hicks," Charmian calls them. We're like pack rats in the hold of a freighter, trading little pretties with rats from other ports. Dreaming of the bright lights, the big city.

Keep it simple, a matter of In and Out. Leni Hofmannstahl: Out.

We staged the homecoming of Leni Hofmannstahl in Clearing Three, also known as Elysium. I crouched in a stand of meticulous reproductions of young vine maples and studied her ship. It had originally looked like a wingless dragonfly, a slender, ten-meter abdomen housing the reaction engine. Now, with the engine removed, it looked like a matte-white pupa, larval eye bulges stuffed with the traditional useless array of sensors and probes. It lay on a gentle rise in the center of the clearing, a specially designed hillock sculpted to support a variety of vessel formats. The newer boats are smaller, like Grand Prix washing machines, minimalist pods with no pretense to being exploratory vessels. Modules for meatshots.

"I don't like it," Hiro said. "I don't like this one. It doesn't feel right... ." He might have been talking to himself; he might almost have been me talking to myself, which meant the handler-surrogate gestalt was almost operational. Locked into my role, I'm no longer the point man for Heaven's hungry ear, a specialized probe radio-linked with an even more specialized psychiatrist; when the gestalt clicks, Hiro and I meld into something else, something we can never admit to each other, not when it isn't happening. Our relationship would give a classical Freudian nightmares. But I knew that he was right; something felt terribly wrong this time.

The clearing was roughly circular. It had to be; it was actually a fifteen-meter round cut through the floor of Heaven, a circular elevator disguised as an Alpine minimeadow. They'd sawed Leni's engine off, hauled her boat into the outer cylinder, lowered the clearing to the air-lock deck, then lifted her to Heaven on a giant pie plate landscaped with grass and wildflowers. They'd blanked her sensors with broadcast overrides and sealed her ports and hatch; Heaven is supposed to be a surprise to the newly arrived.

I found myself wondering whether Charmian was back with Jorge yet. Maybe she'd be cooking something for him, one of the fish we "catch" as they're released into our hands from cages on the pool bottoms. I imagined the smell of frying fish, closed my eyes, and imagined Charmian wading in the shallow water, bright drops beading on her thighs, long-legged girl in a fishpond in Heaven.

"Move, Toby! In now!" My skull rang with the volume; training and the gestalt reflex already had me halfway across the clearing. "Goddamn, goddamn, goddamn... ." Hiro's mantra, and I knew it had managed to go all wrong, then. Hillary the translator was a shrill undertone, BBC ice cracking as she rattled something out at top speed, something about anatomical charts. Hiro must have used the remotes to unseal the hatch, but he didn't wait for it to unscrew itself. He triggered six explosive bolts built into the hull and blew the whole hatch mechanism out intact. It barely missed me. I had instinctively swerved out of its way. Then I was scrambling up the boat's smooth side, grabbing for the honeycomb struts just inside the entranceway; the hatch mechanism had taken the alloy ladder with it.

And I froze there, crouching in the smell of plastique from the bolts, because that was when the Fear found me, really found me, for the first time.

I'd felt it before, the Fear, but only the fringes, the least edge. Now it was vast, the very hollow of night, an emptiness cold and implacable. It was last words, deep space, every long goodbye in the history of our species. It made me cringe, whining. I was shaking, groveling, crying. They lecture us on it, warn us, try to explain it away as a kind of temporary agoraphobia endemic to our work. But we know what it is; surrogates know and handlers can't. No explanation has ever even come close.

It's the Fear. It's the long finger of Big Night, the darkness that feeds the muttering damned to the gentle white maw of Wards. Olga knew it first, Saint Olga. She tried to hide us from it, clawing at her radio gear, bloodying her hands to destroy her ship's broadcast capacity, praying Earth would lose her, let her die....

Hiro was frantic, but he must have understood, and he knew what to do.

He hit me with the pain switch. Hard. Over and over, like a cattle prod. He drove me into the boat. He drove me through the Fear.

Beyond the Fear, there was ~ room. Silence, and a stranger's smell, a woman's.

The cramped module was worn, almost homelike, the tired plastic of the acceleration couch patched with peeling strips of silver tape. But it all seemed to mold itself around an absence. She wasn't there. Then I saw the insane frieze of ballpoint scratchings, crabbed symbols, thousands of tiny, crooked oblongs locking and overlapping. Thumb-smudged, pathetic, it covered most of the rear bulkhead. Hiro was static, whispering, pleading. Find her, Toby, now, please, Toby, find her, find her, find I found her in the surgical bay, a narrow alcove off the crawlway. Above her, the Schone Maschine, the surgical manipulator, glittering, its bright, thin arms neatly folded, chromed limbs of a spider crab, tipped with hemostats, forceps, laser scalpel. Hillary was hysterical, half-lost on some faint channel, something about the anatomy of the human arm, the tendons, the arteries, basic taxonomy. Hillary was screaming.