Wanted: Adventurers for Treasure Hunt in the Pacific

Keith Thomson
3 min readApr 10, 2018
Cocos Island

As a kid in Connecticut, I had a pirating plan. It started with getting in good with the pirate captain William Thompson — an ancestor of mine, I thought. He spelled Thomson the wrong way (with a P), but pirates weren’t known for their literacy. The other hitch was he’d died 150 years earlier. But if you’re eight, you can stare out to sea and believe there’s a pretty good chance that your pirate ancestor’s masts might appear on the horizon, and that he might row ashore and say to you, “Kid, I need you to go on an adventure to get gold.”

For one reason or another, this never came to be. I spent the bulk of the ensuing forty years sitting in an office. But now I’m thinking: Why not actually find Capt. Thompson’s treasure?

Here are our clues: In 1820, Jose de San Martin was leading his rebel forces toward Lima. The Spanish colonists occupying Lima were worried he’d seize the gold and jewels they’d earlier seized from the natives, including solid gold roof panels worth $12 million (in 1820!) and a life size jewel-studded golden Virgin Mary. So the Spaniards hired then-trustworthy British sea captain, William Thompson, to stow the treasure on his brig Mary Dear, sail around for a few months until San Martin had moved on, then return the haul to Lima. The Spaniards sent a few of their men along to make sure Capt. Thompson stayed trustworthy. Thompson and his crew killed them all and turned pirate.

Almost immediately, dozens of Spanish men-o’-war were scouring the Seven Seas for the Mary Dear. The well-known roof panels and the life-size jewel-studded virgin would’ve been tough to fence under the best of circumstances; Thompson and his first mate secured the loot in a cave on an uninhabited island three hundred miles west of Costa Rica. They planned to return for it when things cooled off. Problem was, they died of Yellow Fever. The rest of the crew was caught by a man o’ war and sent to hang out with Davy Jones.

The island’s now called Cocos, and it’s still uninhabited. Thompson did draw up a map. Copies of it are around because, over the years, numerous people have tried to find the treasure, including Franklin Roosevelt, on two separate expeditions. The cave was clearly marked on the map, but no one ever located it because of severe shoreline erosion. Likely the cave is now underwater.

The thing is, none of the previous expeditions had the advantage of the sonar technology commonly found on modern dive ships. If you’ve got that sort of rig, talk to me. Alternatively, to get in the proper mindset, we can pirate one.

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