Inca Gold (Dirk Pitt 12)

"Only the finest rotorcraft in the sky today," replied Pitt. "Stable, reliable, and smooth as oil on water.

Costs about two point seven-five million. We couldn't have asked for a better machine to conduct a search and survey project from the air."

"How far to the Bay of Caraquez?"

"About two hundred and ten kilometers. We can make it in less than an hour with this machine."

"I hope you don't plan to fly over strange terrain in the dark during a tropical storm," Gunn said uneasily, holding a newspaper over his head as a shield against the rain.

Pitt shook his head. "No, we'll wait for first light."

Giordino nodded toward the helicopter. "If I know only one thing, it's not to take a shower with my clothes on. I recommend we throw our baggage and electronic gear on board and get a few hours sleep before dawn."

"That's the best idea I've heard all day," Pitt agreed heartily.

Once their equipment was stowed, Giordino and Gunn reclined the backrests of two passenger seats and fell asleep within minutes. Pitt sat in the pilot's seat under a small lamp and studied the data accumulated by Perlmutter and Yaeger. He was too excited to be tired, certainly not on the eve of a shipwreck search. Most men turn from Jekyll to Hyde whenever the thought of a treasure hunt floods their brain. But Pitt's stimulant was not greed but the challenge of entering the unknown to pursue a trail laid down by adventurous men like him, who lived and died in another era, men who left a mystery for later generations to unravel.

What kind of men walked the decks of sixteenth-century ships, he wondered. Besides the lure of adventure and the remote prospect of riches, what possessed them to sail on voyages sometimes lasting three or more years on ships not much larger than a modest suburban, two-story house? Out of sight of land for months at a time, their teeth falling out from the ravages of scurvy, the crews were decimated by malnutrition and disease. Many were the voyages completed by only ship's officers, who had survived on more abundant rations than the common seamen. Of the eighty-eight men on board the Golden Hind when Drake battled through the Strait of Magellan into the Pacific, only fifty-six were left when he entered Plymouth Harbor.

Pitt turned his attention to the Nuestra Senora de la Concepcion. Perlmutter had included illustrations and cutaway plans of atypical Spanish treasure galleon that sailed the seas during the sixteenth and seventeenth centuries. Pitt's primary interest was in the amount of iron that was on board for the magnetometer to detect. Perlmutter was certain the two cannon she reportedly carried were bronze and would not register on an instrument that measures the intensity of the magnetic field produced by an iron mass.

The galleon carried four anchors. Their shanks, arms, and flukes were cast from iron, but their stocks were wood and they were secured to hemp lines, not chains. If she had been riding on two anchors, the force of the wave, suddenly striking the ship and hurling it ashore, would have probably snapped the lines. That left a small chance her two spare anchors might have survived intact and still be somewhere in the wreckage.

He totaled up the rest of the iron that might have been on board. The fittings, ship's hardware, the big gudgeons and pintles that held the rudder and allowed it to turn. The trusses (iron brackets that helped support the yards or spars), any shackles or grappling irons. The cook's kettle, carpenter's tools, maybe a keg of nails, small firearms, swords, and pikes. Shot for the cannon.

It was an exercise in the dark. Pitt was hardly an authority on sixteenth-century sailing ships. He could only rely on Perlmutter's best guess as to the total iron mass on board the Concepcion. The best estimate ran between one and three tons. Enough, Pitt fervently hoped, for the magnetometer to detect the galleon's anomaly from 50 to 75 meters in the air.

Anything less, and they'd stand about as much chance of locating the galleon as they would of finding a floating bottle with a message in the middle of the South Pacific.

It was about five in the morning, with a light blue sky turning orange over the mountains to the east, as Pitt swung the McDonnell Douglas Explorer helicopter over the waters of the Bay of Caraquez. Fishing boats were leaving the bay and heading out to sea for the day's catch. The crewmen paused as they readied their nets, looked up at the lowflying aircraft and waved. Pitt waved back as the shadow of the Explorer flickered over the little fishing fleet and darted toward the coastline. The dark, radiant blue of deep water soon altered to a turquoise green streaked by long lines of breaking surf that materialized as the seafloor rose to meet the sandy beach.

The long arms of the bay circled and stopped short of each other at the entrance to the Chone River.

Giordino, who was sitting in the copilot's seat, pointed down to the right at a small town with tiny streets and colorfully painted boats drawn up on the beach. The town was surrounded by numerous farms no larger than three or four acres, with little whitewashed adobe houses next to corrals holding goats and a few cows. Pitt followed the river upstream for two kilometers where it foamed white with rapids. Then suddenly the dense rain forest rose like an impenetrable wall and stretched eastward as far as they could see. Except for the river, no opening beneath the trees could be seen.

"We're approaching the lower half of our grid," Pitt said over his shoulder to Gunn, who was hunched over the proton magnetometer.

"Circle around for a couple of minutes while I set up the system," Gunn replied. "Al, can you drop the tow bird for me?"

"As you wish." Giordino nodded, moving from his seat to the rear of the cabin.

Pitt said, "I'll head toward the starting point for our first run and hang around until you're ready."

Giordino lifted the sensor. It was shaped like an air-to-air missile. He lowered it through a floor hatch of the helicopter. Then he unreeled the sensor on its umbilical cable. "Tow bird out about thirty meters,"

he announced.

"I'm picking up interference from the helicopter," said Gunn. "Give me another twenty meters."

Giordino complied. "How's that?"

"Good. Now hold on while I set the digital and analog recorders."

"What about the camera and data acquisition systems?"

"Them too."

"No need to hurry," said Pitt. "I'm still programming my grid lane data into the satellite navigation computer."