In July of 1774, Captain James Cook arrived back in London from his second voyage. With him was a man named Mai, a native of an island called Raiatea in the South Pacific. Cook’s intention was to showcase a human souvenir—a live specimen—who would help the British understand the exotic nature of his circumnavigation. Mai remained in England for two years and returned to the South Pacific in 1776. While in England, he sat for...