THREE hours into the flight, they were in good shape fuel-wise after picking up a tailwind of five knots. The Indian Ocean slowly vanished as they entered overcast skies that came from the east, bringing rain squalls and turbulence. Giordino climbed to find smooth air and blue skies again, rising above white puffy clouds that rolled beneath them like a stormy sea.

Giordino had the uncanny ability to sleep for ten minutes, then pop awake to check his instruments and make any course alteration suggested by Gunn before dozing off again. He repeated the process more times than Gunn bothered to count, never varying the routine by more or less than a minute.

Actually, there was no fear of becoming lost and missing the island. The tilt-rotor carried the latest Global Positioning System (GPS) navigation equipment. With the GPS receiver measuring the distance to a string of satellites, the precise lat.i.tude, longitude, and alt.i.tude were calculated, and the data programmed into the aircraft computer so Gunn could determine course, speed, time, and distance to their destination.

Unlike Giordino, he was an insomniac. He was also what Giordino often called him-a worrywart. Gunn couldn't have relaxed if he was lying under a palm tree on a Tahitian beach. He constantly read his watch and checked their position in between studying an aerial photo of the island.

When Giordino came awake and scanned the instrument panel, Gunn tapped him on the arm. "Don't drift off again. You should begin your descent. I make the island forty miles dead ahead."

Giordino rubbed water from a canteen on his face and eased the control column a slight inch forward. Slowly, the executive tilt-rotor began to descend, thrown about as it dropped through the turbulence from inside the clouds. With nothing to see, Giordino could have simply watched the altimeter needle swing counterclockwise, but he kept his eyes fixed on the white mist swirling past the windshield. Then, suddenly, at 5,000 feet they emerged from under the overcast and saw the ocean again for the first time in three hours.

"Nice work, Rudi," Giordino praised him. "St. Paul looks to be about five miles ahead, less than two degrees off to starboard. You as good as. .h.i.t her right on the nose."

"Two degrees," Gunn said. "I really must do better next time."

With the turbulence behind them, the wingtips stopped fluttering. Giordino eased the throttles back, the roar of the engines falling to a m.u.f.fled hum. The heavy rain had subsided, but rivulets of water still streaked across the windshield. Only now did he turn on the wipers, as he aimed the bow of the plane over the high cliffs that shielded the island from the relentless onslaught of the sea.

"Have you picked out a spot to set down?" asked Giordino, staring at the little island and its single mountain that seemed to rise up out of the sea like a giant cone. There was no obvious sign of a beach or open field. He saw only 360 degrees of steep rock-covered slopes.

Gunn held up a magnifying gla.s.s in front of his eyes. "I've gone over every inch of this thing, and have come to the conclusion that it's the worst piece of real estate I've ever seen. It's nothing but a rock pile, good only for supporting a gravel company."

"Don't tell me we've come all this way only to turn back," Giordino said sourly.

"I didn't say we couldn't land. The only flat area on the whole island is near the base of the mountain on the west side. Looks like little more than a ledge, maybe fifty by a hundred feet."

Giordino looked downright horrified. "Not even in the movies do they land helicopters on the sides of mountains."

Gunn pointed through the windshield. "There, on your left. It doesn't look as bad as I thought."

From Giordino's angle, the only level site to be found against the mountain looked no larger than the bed of a pickup truck. His feet finessed the rudder pedals as his hands stroked the wheel on the control column, correcting his angle and rate of descent with the elevators and ailerons. He thanked heaven that he had a head wind, even if it was only four knots. He could see the rocks scattered across his tiny landing site, but none looked large enough to cause damage to the aircraft's undercarriage. One hand came off the column and began manipulating the levers operating the prop rotors, tilting them from horizontal to vertical until the aircraft was hovering like a helicopter. The large-diameter propellers began sending small stones and dust swirling in damp clouds below the landing wheels.

Giordino was flying by feel now, head turned downward, one eye on the approaching ground, the other on the sheer side of the mountain not more than ten feet beyond the starboard wingtip. And then there was a slight b.u.mp as the tires struck the loose rock, and the tilt-rotor settled like a fat goose over her unhatched eggs. He let out a great sigh and pulled back on the throttles before shutting down the engines.

"We're home," he said thankfully.

Gunn's owlish face crinkled into a smile. "Was there ever a doubt?"

"I've got the mountain on my side. What's on yours?"

During the landing, Gunn's attention had been focused on the side of the mountain, and only now did he look out the starboard window. Not more than four feet from his exit door, the ledge dropped off at a steep angle for nearly eight hundred feet. The wingtip hung far out over empty air. The smile was gone and his face pale when he turned back to Giordino.

"It wasn't as expansive as I thought," he murmured sheepishly.

Giordino threw off his safety harness. "Do you have a route to the chamber figured out?"

Gunn held up the aerial photo and pointed to a small canyon leading up from the sh.o.r.e. "This is the only way a hunting party could have penetrated the island and made their way up the mountain. Pitt said that according to the ship's log, the colonel and his party climbed halfway up the mountain. We're about at that level now."

"What direction is the ravine?"

"South. And to answer your next question, we're on the west side of the mountain. With a little luck, we won't have to hike more than three-quarters of a mile, provided we can stumble onto the ancient walkway the colonel mentioned."

"Thank G.o.d for small islands," Giordino murmured. "Can you detect the old road on your photo?"

"No, I can't see any sign of it."

They proceeded to untie the straps containing the survival gear and donned their backpacks. The rain returned in sheets, so they slipped foul-weather gear on over their clothes and boots. When ready, they threw open the pa.s.senger door and stepped to the rocky ground. Beyond the ledge was the sheer drop, and beyond the drop, nothing but the Indian Ocean and gray pewter waves. As a safety precaution, they tied down the aircraft to several huge boulders.

The threatening sky made the island seem all the more drab and desolate. Gunn squinted through the rain and motioned for Giordino to lead, pointing in the direction he wanted to follow. They set off diagonally across the slope of the mountain, staying inside the larger rocks where the ground was flatter and firm beneath their feet.

They struggled across small ledges and narrow crevices, trying to walk upright without resorting to mountain-climbing gear, a skill in which neither was proficient. Giordino seemed impervious to fatigue. His thick, powerful body took the climb over the rocks in stride. Gunn had no problems, either. He was wiry and far tougher than he looked. He began to fall back from the unyielding Giordino, not from weariness but because he had to stop every twenty yards to wipe the moisture from his gla.s.ses.

About midway across the west side of the mountain, Giordino came to a halt. "If your reckoning is right, the stone walkway should be a short distance above or below us."

Gunn sat down with his back to a smooth lava rock and peered at his photo, which had become dog-eared and soggy from the damp. "a.s.suming the colonel took the path of least resistance from the ravine, he should have worked his way across the mountain about a hundred feet below us."

Giordino crouched, placed his hands on slightly bent knees, and stared down the slope. He seemed entranced for several moments before he turned back and looked Gunn full in the face. "I swear to G.o.d, I don't know how you do it."

"What do you mean?"

"Not thirty feet below where we sit is a narrow road paved with smooth rocks."

Gunn peered over the edge. Almost within spitting distance, he saw a road, a path really, four feet wide, laid with stones long aged by the weather. The path traveled in both directions, but landslides had carried much of it down the slope. In the cracks between the stones, a strange-looking plant was sprouting. It had lettucelike heads and grew close to the ground.

"It must be the road described by the British colonel," said Gunn.

"What's that weird stuff growing in it?" asked Giordino.

"Kerguelen cabbage. It produces a pungent oil and can be eaten as a cooked vegetable."

"Now you know why the road was indistinguishable on the photo. It was hidden by cabbages."

"Yes, I can see that now," said Gunn.

"How did it get established on such a G.o.dforsaken island?"

"Probably by its pollen that was carried across the water by the wind."

"Which direction do you want to follow the road?"

Gunn's eyes scanned the flat-laid stones as far as he could in both directions until they were lost to view. "The colonel must have stumbled onto the road down to our right. Below that point it must have been destroyed by erosion and slides. Since it makes no sense to start at the top of the mountain and work down, the chamber must be hidden farther up the slope. So we go to the left and climb."

Stepping cautiously on the loose lava rock, they quickly reached the neatly laid stones and began ascending the road. The flat pa.s.sage was a welcome relief, but landslides were another matter. They had to cross two of them, each nearly thirty or more yards wide. It was slow going. The lava rock was jagged and knifelike. One slip and their bodies would tumble down the slope, gathering momentum until they bounced over the cliffs far below into the sea.

After negotiating the last hurdle, they sat and rested. Giordino idly picked a cabbage and flipped it down the hill, watching it bounce and shred on its erratic journey. He lost sight of it and did not see the splash as it shot into the water like a cannonball. Instead of lessening, the atmosphere chilled and thickened. The wind gusts strengthened and whipped the rain against their faces. Though they were protected by foul-weather gear, the water found ways of seeping in and around their collars, soaking their inner clothing.

Gunn pa.s.sed him a thermos of coffee that had gone from steaming hot to lukewarm. Their lunch consisted of four granola bars. They weren't quite in the realm of miserable just yet, but they would soon enter it.