The prudent thing to do would be to surface according to the dive tables he’d memorized decades ago and wait for Max to return. But Juan wasn’t one to let opportunity go to waste, so he inverted himself and swam back for the bottom. There was no sense leaving until he was positive he’d missed nothing.
He examined the niche first, going so far as to press himself into it to see if it activated any kind of device. The chiseled stone around him remained innocuous. He sank lower still. The silt he’d kicked up earlier had settled back to the bottom. He cleared away an area where the wall met the floor. And something caught his attention. He pulled his dive knife from the sheath strapped to his calf and ran it along the seam. The tip vanished into a tiny gap between the floor and wall. He tried again at another spot and found the same thing.
Three more attempts convinced him that the floor of the Treasure Pit was fitted like a plug. There was something deeper in the earth, something buried below this false bottom.
He thought for a moment. There had to be a way to get there. The Ronishes had figured it out. Cabrillo swam a slow circuit of the floor, his dive light shining on the joint. It was in a corner. A stone was wedged tightly between the floor and a small irregularity projecting from the wall.
Juan didn’t touch it. Instead, he pulled his knees up to his chest and thrust them down onto the floor. The impact sent pain shooting up from his heels but also made the entire floor of the pit bobble ever so slightly. He glanced back up at the niche.
Clever, he thought. Very, very clever.
He returned to the rock wedge and got himself ready. He had no idea how much time he had, but he assumed he’d have to be quick. Reaching out a hand, he pulled the stone free, then finned for the grotto as fast as he could. Where a second ago all he could hear was the sound of his breathing, the pit was suddenly filled with the scrape of stone against stone.
The bottom of the chamber was an enormous float, kept in place by the wedge. Juan threw himself into the niche just as the silt-covered floor reached it. He pressed himself as far back as possible. The pit’s designers hadn’t had bulky scuba tanks, so the fit was tight. He watched in awe as the floor rose higher and higher. It climbed past his knees, then waist, and continued upward. It wasn’t so buoyant that it raced for the surface, but rather it ascended at a stately pace.
He realized that his fiber-optic cable was trapped between the float and the wall, and said a silent prayer that it wouldn’t get cut. No sooner had he thought it than the frayed end drifted down over him, the plastic abraded away. A second later, the loose end of his lifeline drifted past, too.
He had no idea how the float would stop but he figured it must, otherwise the Ronish brothers would have perished down here seventy years ago.
One mystery was solved when he got his first look at the side of the giant float. The top layer was just a thin veneer of slate while the rest of it was metal. When he tapped it, it rang hollow. The metal had withstood centuries of immersion in salt water because the designer had covered it in a layer of fine gold flake. Gold never corrodes, and could protect the metal float for centuries.
There were marks in the gold, thin lines cut through it as if someone had scraped some away with a knife. He imagined it had been one of the Ronish boys thinking the whole drum was made of gold only to see it was just a patina not even a millimeter thick. Where the knife had left scars, Juan could see that the float was made of bronze. While this metal resisted corrosion better than steel, he figured in another couple of decades the sea would find a way to eat through the scar. The hollow float would fill with water, and the trap would never work again.
Cabrillo estimated the drum was ten feet tall, and when the bottom of it finally passed over his head it stopped in line with the top of the niche. It had to have hit another small projection from the shaft wall that he had overlooked on his way down. He marveled at the engineering it took to make this work.
He swam out of the niche and looked up. There was a handle on the underside of the float. He grabbed it and tugged. The buoyancy had been so perfectly calculated that he was able to pull the enormous contraption downward a bit. He knew he could get out by tying his lead weight belt to the handle and letting the float settle back to the bottom while he waited in the niche. He assumed that’s what the Ronishes had done, only their weight had dropped away. He descended past where the bottom of the shaft had been and sank lower still.
In the exact center of the real floor of the Treasure Pit he found a pile of rocks from the beach. The Ronish brothers’ counterweight. The bag that had once held them had long since been dissolved by the Pacific’s salt water. The other discovery Juan made was far more intriguing. There was a low tunnel off the main vertical shaft.
Cabrillo entered it, his tanks tapping on the ceiling because the fit was so tight. The tunnel angled up sharply, forcing him to pause several times in order to let the excess nitrogen dissolve out of his system. He checked his air supply. If he didn’t dawdle, he’d be okay.
His light suddenly flashed on a reflection above him. He was approaching the surface, though he was still many hundreds of feet belowground. He also estimated that a person could swim from the niche to this point on a single held breath if the tide was low enough.
Juan rose slowly, his arms extended over his head to probe for any unseen obstructions above him. His head emerged in a bedroom-sized grotto with a ceiling about seven feet high. He realized that all of this had to be a natural rock formation, otherwise it would have taken years to excavate.
His light zigged and zagged across the dank stone until settling on an object hanging from the wall.
“What the hell is that?” Cabrillo asked aloud, his voice muffled by awe and the surrounding rock.
Just above the waterline was a plaque made of some metal. Bronze, he supposed. On it were lines of characters that looked to him like Chinese and the outline of a coast showing a deep bay. He had surmised since the Argentines had shown up at James Ronish’s house that the Treasure Pit had nothing to do with an eighteenth-century privateer, but he hadn’t expected this. What was Chinese writing doing in this place?
More important, why did anyone else care?
Cabrillo had always known to trust his instincts. They had served him well with the CIA and even better when he formed the Corporation. For reasons unknown, someone had gone to great lengths to hide the plaque and yet made it possible to be found. Their logic eluded him, and he could only hope that the writing would explain their motivations. Juan knew he was onto something, and, while he didn’t know what, he felt certain it went far beyond lost blimps and downed satellites.
With the fiber-optic severed, he couldn’t use video to record an image of the bronze plaque, so he pulled a small digital camera from a bag tied around his waist and removed it from its waterproof case. He snapped dozens of pictures, the flash searing his eyes after so much time in the pit.
He ducked back under the surface and followed his light as he retraced his way back to the main shaft. He had to force himself not to think about the enigma and concentrate on the dive instead.
Once he reached the big floating plug, Juan unclasped his weight belt and buckled it around the handle the—Chinese?—had left just for that purpose. The mystery of the Treasure Pit went back more than a hundred years, he thought. When had the Chines
e been to Washington State long enough to reshape the cave system to suit their needs?
Concentrate, Juan.
With the belt in place, the well-balanced hollow drum began to sink ever so slowly. He pushed himself into the niche and waited for the contraption to sink past him. He helped it along by pressing downward against its flank with his hands. In a few moments, he was clear to make his ascent to the surface. It was awkward without the weight belt, and he had to fight his positive buoyancy, especially at the decompression stops. By the time his head thrust clear of the water, he was sucking on empty tanks.
He stripped off his helmet and gulped the salty air greedily. The sun’s angle had changed, and the tiny amount of light filtering down from the surface was a welcome sight. He swept the beam of his torch around, vainly trying to find the tow cable. The implications were too horrible to consider if something had happened to Max. A two-hundred-foot climb without the proper equipment would tax even his abilities. Worse, though, would be losing his best friend.