SS Central America, sunk in 1857 with 14,000 kg of gold.."the old insurance companies who’d paid out when the original ship demanded, and were rewarded, in court a substantial amount of the gold recovered."
https://www.thenakedscientists.com/articles/interviews/how-f...
Search for the SS Central America: Mathematical Treasure Hunting, Lawrence D. Stone https://www.researchgate.net/publication/247823555_Search_fo...