Captain Nemo was obviously familiar with this bivalve's existence. This wasn't the first time he'd paid it a visit, and I thought his sole reason for leading us to this locality was to show us a natural curiosity. I was mistaken. Captain Nemo had an explicit personal interest in checking on the current condition of this giant clam. The mollusk's two valves were partly open. The captain approached and stuck his dagger vertically between the shells to discourage any ideas about closing; then with his hands he raised the fringed, membrane–filled tunic that made up the animal's mantle. There, between its leaflike folds, I saw a loose pearl as big as a coconut. Its globular shape, perfect clarity, and wonderful orient made it a jewel of incalculable value. Carried away by curiosit