"Dierkz was on the survey team," Oscar said patiently, his washed out hazel eyes trying to read Anna's face.

It wasn't an earth-shattering revelation. Most cavers led other lives. They were geologists and physicists, beekeepers and bums; regular folks who had been bitten by an irregular bug that compelled them to creep beneath the skin of the world every chance they got. Anna had seen the photos of a helmeted and mud-bedaubed Frieda grinning out from nasty little crevices Anna wouldn't go into for love or money, and she'd listened with half an ear about her upcoming "vacation." She'd just not put two and two together.

"What does she want me for?" Without much caring, Anna noted the disapproval sharpening Iverson's gaze. She could guess where it came from: cavers helped cavers. It was an unwritten law of survival. Who else was going to fish them out of the god-awful places they insisted on pushing their way into? Iverson stared, and Anna stared back, refusing to apologize or explain. A moment passed, and his look softened. Perhaps he reminded himself she was not a caver but a mere mortal.

"The injury is worse than first thought." He spoke slowly as if Anna had a learning disability. His voice was low, gentling. She would have been irritated at the condescension had she not known Iverson always talked that way. "The caver who hiked out said a broken leg. Painful but not life-threatening. Apparently the rock that smashed her kneecap struck a glancing blow to her left temple as it fell. She was knocked unconscious but only briefly. We just got a second report. It was brought out by a member of another team surveying in the Great Beyond. He met up with one of Dierkz's team in Windy City and brought out a message. She's been slipping in and out of consciousness and has suffered some disorientation."

"Head injury," Anna said. "Bad news."

"Bad news," Iverson agreed. "Peter McCarty, a member of Dierkz's team, is an M.D. in real life. That's the good news. She's got a doctor with her. McCarty recommended we get Ms. Dierkz what she wants. She's agitated, and it is not helping her medical condition any. He feels it would soothe her if she could have a friend there."

"A lady-in-waiting?"

"Exactly."

A chilling image filled Anna's mind: herself crouched and whimpering, fear pouring like poison through her limbs, shutting down her brain as the cave closed in around her. Adrenaline spurted into her bloodstream, and she could feel the numbness in her fingertips and a tingling as of ice water drizzling on her scalp. To hide her thoughts she rubbed her face.

"Will you go?" Iverson asked.

Anna scrubbed the crawling sensation from her hair with her knuckles. "Just deciding what to wear."

Oscar looked at her shrewdly, the long, narrow eyes turning the color of bleached lichen. "Let me rephrase that: can you?"

"I don't know," Anna answered truthfully. "Can I?"

"Caving?"

"None."

"Climbing?"

"Some."

"Rapels sixty to a hundred fifty feet. Ascents ditto, naturally. Rope climbs with ascenders."

"I can do that."

"Crawl on your belly like a reptile?"

Jesus. "How much?"

Oscar laughed, a huffing noise concentrated in the back of his throat and his nostrils. "Not much where we're going. Lechuguilla is a big place. Huge. It's where the NPS stores Monument Valley during the off-season."

It was Anna's turn to laugh, but she didn't. "The crawls," she said. "How much is 'not much'?"

"Three or four good crawls."

"An oxymoron."

Iverson sat, letting her absorb the information. His heel rang its dull music from the side of the desk. Anna quashed an urge to grab his ankle, stop the pendulum. She tried to think of Frieda, alone and confused, hurt and afraid. She tried to think of friendship and honor and courage and duty. Cowardly thoughts of a way out pushed these higher musings aside: claims of a bad heart, a dying mother's call, or, if all else failed, "accidentally" shooting herself in the foot.

"Can you?" Iverson asked finally. Her time had run out.

Over the cringing claustrophobia, her mind had begun to chant the Little Engine That Could's mantra. She gave the cave specialist the edited version. "Sure."

Oscar Iverson had vanished into what in any other law enforcement organization might have been gloriously termed a council of war. Under the civilizing influence of the NPS it was called a "team briefing." In an attempt to feel unity and coherence during cuts and down-sizings, the Park Service had begun to overuse comforting words: team, group, symposium, cluster. Words to keep from feeling alone and, if necessary, to diffuse the blame.

Anna had been handed over to two cavers from Palo Alto, California. Timmy, a man who when aboveground was actually employed as a bona fide rocket scientist, though he preferred a less incendiary title, and his wife, Lisa, a New Zealander who had caved all over the world, enjoying photographic junkets in places with such alluring names as the Grim Crawl of Death.

Had Anna been able to focus on anything other than not getting the shakes, she might have enjoyed the transformation process. Like an ugly duckling in an old movie, she was made over from head to toe. She was fitted with a brimless helmet and a battery-powered lamp strapped on with elastic. The batteries, three C-cells, resided in a black plastic case at the back of the helmet. The pack Timmy and Lisa put together for her was unlike anything she had used before. An elongated sack with a drawstring top, it was worn on the hip, with the strap over the opposite shoulder, like a woman's purse. A second strap secured it loosely around the waist.

"It's a sidepack," Lisa explained as Anna fussed with the unfamiliar equipment, unable to get comfortable. "In tight squeezes you can slip it off easily and shove it ahead. Or tie it to your foot and drag it behind."

Dumbly, Anna nodded. The image gave her the willies.

"You could probably take a regular pack where you're going. Tons of room," Timmy said, and Anna wondered what had given her away, the bloodless lips or the slight trembling in her knees. She doubted Timmy's words were meant kindly. There was a coldness in him that she suspected was born of contempt. In the narrow world of a specialty-diving, climbing, caving-cliques formed, egos became wrapped in layer after layer of shared hype, of the glamour of overcoming real and imagined dangers, of feeling the exquisite pleasure of keeping secrets denied the uninitiated. Devotees ran the risk of becoming intoxicated by their own differences. Finally they came to resemble the stereotypical Parisian; if one couldn't speak his language, and flawlessly, the conversation was over.

Screw him, Anna thought uncharitably.

"How about Razor Blade Run?" Lisa asked her husband. Lisa was in her forties and wore her hair in two long plaits that reached to the back of her knees. Her face was round and gave the impression of being lumpy, but her eyes were fine, and Anna'd seen a smile transform her into an exotic kind of beauty.

"Okay, you'll need a sidepack at Razor Blade," Timmy conceded. He was a spare man, shorter than his wife and leaner, with pale wisps of hair defining upper lip and chin. His eyes, colorless behind tinted glasses, took on a faraway look as his hands continued buckling the web gear girdling Anna. "And the Wormhole," he said finally.

"And coming out of Tinker's," his wife added.

"I get the picture," Anna snapped.

Chastened, the two cavers stopped talking. It was clear they were sensitive individuals, aware they'd offended. Equally clear was the fact that they hadn't a clue as to why. The few cavers with whom Anna had ever conversed insisted that they, better than anyone, understood claustrophobia because, when wedged in some tight Floyd Collinsian crack with the very real possibility of never getting out, they felt fear.