Now it was Nick and his brothers’ turn, and he had deduced something his uncles and father had not. At the time Pierre Devereaux had excavated the pit to hide his treasure, the only pump available to him would have been his ship’s hand-operated bilge pump. Because of its inefficiency, there was no way the pirates could have drained the pit with their equipment when three ten-horse pumps couldn’t.

The answer to how the pit worked lay someplace else.

Nick knew from the stories his uncles told that they had made their assault during the height of summer, and when he consulted an old almanac, he saw the men had been working during a period of particularly high low tides. He knew that to be successful he and his brothers would have to try to reach the bottom at the same time of year Devereaux had dug the pit—when the tides were at their very lowest—and this year that fell at a little past two o’clock on December the seventh.

The older brothers had been planning their attempt at cracking the pit since early summer. By doing odd jobs for anyone who’d hire them, they’d scraped together money to buy equipment, notably a two-stroke gasoline-powered pump, the rope, and tin miner’s helmets with battery-powered lights. They’d practiced with the rope and a laden bucket so their arms and shoulders could work tirelessly for hours. They’d even devised goggles that would let them see underwater if necessary.

Jimmy was only along because he had overheard them talking about it all and had threatened to tell their parents if he wasn’t included.

There was a sudden commotion off to their right, an explosion of birds winging into the bright sky. Behind them, Amelia, their golden retriever, came bounding out of the tree line, barking wildly with her tail swinging like the devil’s own metronome. She chased after one gull that flew close to the ground and then halted, dumbfounded, when the bird shot into the air. Her tongue lolled, and a string of saliva drizzled from her black gums.

“Amelia! Come!” Jimmy cried in his falsetto, and the dog dashed to his side, nearly bowling him over in her excitement.

“Shrimp, take these,” Nick said, handing Jimmy the mining helmets and their satchels of heavy lead batteries.

The pump was the heaviest piece of gear, and Nick had devised a sling with two carrying polls like he’d seen on Saturday-matinee serials when natives carried the movie’s hero back to their camp. The poles were lengths of timber taken from a construction site, and the four older boys hoisted them on their shoulders and lifted the engine from the rowboat. It swung and then steadied, and they started the first mile-long trek across the isle.

It took forty-five minutes to haul all of their equipment across the island. The pit was located on a bluff above a shallow bay that was the only feature to mar its otherwise perfect heart shape. Waves smashed into the coast, but with the weather so fair only an occasional drop of white spume had the energy to climb the cliffs and land near the pit.