The Italians mistakenly searched the ocean near Africa for centuries while Louisa's family held the key to the location of the treasure in a mahogany and brass telescope. Derek slowly unwrapped the fragile paper. The lost ship could be an insanely lucrative find, but perilous if others knew one of the coordinates was dead on. Submerging with their underwater craft was a fall-rise-fall thrill ride with more than just the creatures of the deep.