Tupaia was the brilliant Polynesian navigator and translator who sailed with Captain James Cook from Tahiti, piloted the "Endeavour" across the South Pacific, and interceded on behalf of the European voyagers with the warrior Maori of New Zealand. As a man of high social ranking, Tupaia was also invaluable as an intermediary, interpreting local rituals and ceremonies. Joseph Banks, the botanist with Cook's expedition, is famous for describing the manners and customs of the Polynesian people in detail. Much of the credit for this information rightfully belongs to Tupaia--indeed, he could...