Ingots of Gold: A Miss Marple Short Story

Raymond West approaches the Tuesday Night Club with a question. He has recently visited a friend, John Newman, who has been searching for the Spanish ship, Otranto, which was shipwrecked off the coast of Cornwall. There's something strange, and he asks if the Club can offer guidance. John had disappeared for days, and upon his return he claimed that he had been abducted by the thieves who had stripped the ship of its gold. Will Miss Marple be the one to solve the mystery of the Otranto and its dangerous allure?