A mystery about White Pond and a pirate's treasure chest is retold by former Concord resident Carolou Marquet who wrote a history of this part of town. The following is excerpted from her history:
Edward Rowe Snow tells the details in his book True Tales and Curious Legends. Thomas Tew, a famous pirate in Captain Kidd's day, and his pirates captured a Moorish vessel off the coast of Africa, robbed it of its treasure, killed almost everybody, and scuttled the vessel. He rescued only a beautiful Moorish lady and brought her on board his ship. His booty consisted of three treasure chests filled with gold, diamonds, and other precious jewels, valued in today's market at about a quarter of a million dollars.
Tew sailed back to New England and was hit by a violent storm off the New Hampshire coast. His pirates got drunk and one by one were washed overboard. When his ship was finally wrecked on Boon Island, Maine, only he, his first mate Juan Carlos, and the Moorish lady were alive.
The survivors collected all the booty they could from the wreck and hid it in a chest on the island. Soon after, the Moorish lady killed Captain Tew and then committed suicide, leaving only Juan Carlos alive on the island. Juan Carlos was finally rescued and after three years was able to go back to Boon Island to collect his treasure. He put the treasure in deerskin pouches and a week later went to White Pond in Concord where he had friends. There they buried it on the shore.
Digging for the treasure went on for many years. Thoreau, many years later, tells of seeing holes at the beach made by treasure seekers. The fate of the treasure is unknown. Many are sure that those who dug up the treasure rowed out to the middle of the pond and dropped the sacks into 60 feet of water to what may still be their final resting place!