"As a matter of fact, he never forgave you for filling his boots with ice during an expedition north of the Bering Sea."

"Jim certainly holds a grudge. That was fifteen years ago."

"You've spent quite a number of years in the Arctic and Antarctic."

"Been studying sea ice for eighteen years. By the way, I volunteered to go with you."

"Don't think me ungrateful, but I'd rather go it alone."

Northrop nodded and held his ample stomach with both hands. "Won't hurt to have a good man along who can read the ice, and I'm more durable than I look."

"You make a good point."

"Bottom coming up," Gillespie announced. Then he called down to the engine room. "All stop, Chief. This is as far as we go." He glanced in Pitt's direction. "We're sitting on top of the lat.i.tude and longitude you gave me."

"Thank you, Dan. Good work. This should be the approximate spot where the Paloverde was frozen in the ice during the Antarctic winter of 1858."

Northrop stared through the bridge windows at the ice spreading from the ship to sh.o.r.e. "I make it about two miles. A short hike in the brisk air will do us good."

"You have no snowmobiles on board?"

"Sorry, our work takes place within a hundred yards of the ship. We saw no need to add luxuries to the project budget."

"What temperature do you consider brisk air?"

"Five to ten degrees below zero. Relatively warm in these parts."

"I can't wait," Pitt said laconically.

"Consider yourself lucky it's autumn down here. It's much colder in spring."

"I prefer the tropics, with warm trade winds and lovely girls in sarongs swaying to the beat of a drum under the setting sun."

His eyes traveled to an attractive Asian lady who walked straight up to him. She smiled and said, "Aren't you being overdramatic?"

"It's my nature."

"I'm told you're Dirk Pitt."

He smiled cordially. "I do hope so. And you must be Evie Tan. Dan Gillespie has told me you're doing a photo story about the ice expedition."

"I read a great deal about your exploits. May I interview you when you return from whatever it is you're looking for?"

Pitt instinctively threw a questioning look at Gillespie, who shook his head. "I haven't told a soul about your target."

Pitt pressed her hand. "I'll be happy to give you an interview, but the nature of our project must be off the record."

"Does it have to do with the military?" she asked, with an innocent face.

Pitt caught her sneaky probe instantly. "Nothing to do with cla.s.sified military activities, or Spanish treasure galleons, or abominable snowmen. In fact, the story is so dull, I doubt any self-respecting journalist would be interested in it." Then he addressed Gillespie. "Looks like we left the submarine at the edge of the ice floe."

"Either that," said the captain, "or else they followed us under the ice."

"They're ready for you," said First Officer Bushey to Pitt.

"On my way."

The crew lowered the gangway and brought down three sleds to the ice, one with a box of ice-cutting tools covered by a tarpaulin. The other two carried only tie-down rope to secure any artifacts they might find. Pitt stood in the feathery foot-deep snow and looked at Gillespie, who had motioned to a man who was about the size and shape of a Kodiak bear. "I'm sending my third officer with you and Doc Northrop. This is Ira c.o.x."

"Glad to meet y'all," said c.o.x, through a beard that came down to his chest. The voice seemed to rise from somewhere deep below the Mason-Dixon line. He didn't offer a hand. His immense paws were covered by equally immense Arctic gloves.

"Another volunteer?"

"My idea," offered Gillespie. "I can't allow one of Admiral Sandecker's chief directors to traipse through a field of unpredictable ice alone. I won't take the responsibility. This way, if you encounter any problems, you'll have a better chance of surviving. If you should run into a polar bear, c.o.x will wrestle it to death."

"There are no polar bears in the Antarctic."

Gillespie looked at Pitt and shrugged. "Why take chances?"

Pitt did not make a formal or indignant protest. Down deep, he knew that if worse came to worst, one or both of those men just might save his life.

AS autumn takes over the Antarctic, the stormy seas surround the continent, but as winter arrives and temperatures drop, the water thickens into oily-appearing slicks. Then the ice fragments form floating saucers called pancake ice, which enlarge and merge together before eventually forming ice floes covered by snow. Because the ice came early this year, Pitt, Northrop, and c.o.x moved without incident across the uneven but fairly smooth surface. They detoured around several ice ridges and two icebergs that had drifted offsh.o.r.e before being frozen in the pack ice. To Pitt, the floe looked like an unkempt, lumpy bed with a white quilt thrown over it.

Trudging through a foot of feathery snow did not hinder their motion. Their pace never slackened. Northrop went first, studying the ice as he went, watchful for any deviation or crack. He walked without the burden of a sled, insisting that he required more freedom of movement to test the ice. Harnessed to a sled, Pitt followed Northrop, easily moving on cross-country skis that he had shipped from his father's lodge in Breckenridge, Colorado. c.o.x brought up the rear, wearing showshoes and pulling two sleds as effortlessly as if they were toys.

What began as a beautiful day with a dazzling sun in an uncluttered sky deteriorated as clouds crept over the horizon. Slowly, the blue skies went gray and the sun became a muted ball of faded orange. A light snow began to fall, reducing visibility. Pitt ignored the worsening weather, and did not allow his mind to linger on the green, frigid water only an arm's length below his feet. He kept glancing at the cliffs, which rose higher and higher above the tips of his skis the closer they came. He could see the ice-free rugged Hansen Mountains far inland, but still no sign of a shadowy shape embedded in the ice. He began to feel like an intruder in this vast, remote domain unspoiled by human habitation.

They made their crossing over the floe and reached the base of the ice cliffs in slightly over an hour. Gillespie followed their every movement until they stopped at the inner edge of the ice floe. Their turquoise NUMA arctic gear made them easily visible against the brilliant white. He checked the meteorological reports for the tenth time. The falling snow was light and there was no wind, but he knew well that could change in a matter of minutes. It was the wind that was the unknown factor. Without warning, it could turn a dazzling white landscape into a howling whiteout.

Gillespie picked up the ship's satellite phone and dialed a number. He was put through immediately to Sandecker. "They're on sh.o.r.e and beginning the search," he informed his boss.

"Thank you, Dan," Sandecker replied. "Report to me when they return."

"Before I ring off, Admiral, there is something else. I'm afraid we have a rather baffling situation." He then gave Sandecker a concise report on the U-boat. When he finished, there was the expected pause while the admiral tried to digest what he had just heard.

Finally, he replied tersely, "I'll take care of it."

Gillespie went back to the broad windshield of the bridge and picked up his gla.s.ses again. "All this for a shipwreck," he said under his breath. "It had better be worth it."

ON sh.o.r.e, Pitt was fighting off discouragement. He was well aware that any search for something lost so far back in time was a long shot. There was no way of determining how much ice had formed to enshroud the entire ship in 150 years. For all he knew, it could be a hundred yards deep within the ice. Using the Polar Storm as a base point, he marked off a two-mile grid below the sheer, icebound cliffs. Pitt and c.o.x each used small handheld GPS units the size of a cigarette pack to pinpoint their precise location at any moment. They split up, leaving the sleds at the departure point. Pitt headed to his left, making good time on his skis along the ice floe where it met the cliffs, while c.o.x and Northrop searched to the right. When they each reached the approximate end of a mile, they agreed to return to their starting point.

Making better time than the others, Pitt was the first to return to the sleds. Examining every foot of the lower cliffs going and coming, he was disappointed not to find the slightest clue to the Madras. Thirty minutes later, the glaciologist arrived and lay with his back over a small hummock of ice, legs and arms outstretched, catching his breath and resting his aching knees and ankles. He looked at Pitt through his dark bronze goggles and made a gesture of defeat.

"Sorry, Dirk, I saw nothing in the ice that resembled an old ship."