In 1815, Napoleon Bonaparte arrived on the island of St. Helena to begin his imprisonment following Waterloo. By 1821 he was dead. During his brief stay, he crossed paths with six medical men, all of whom would be changed by the encounter, whether by court martial, the shame of misdiagnosis, or resulting celebrity. What would seem to be a straightforward post became entangled with politics, as Governor Hudson Lowe became paranoid as to the motivations...