A combination of two journeys, Scotsman Mungo Park's story of his first trip in 1795 as a 24-year old, and again in 1805, provided Europeans with their first reliable description of the interior of the continent. The first trip was full of an endearing vulnerability and the heroic generosity of a fit young man, while the second was one of Conradian tragedy, murder, and mayhem. Despite starvation, imprisonment, and frequent illness, he managed to keep...