Their marriage was both improbable and inevitable. Isabel Arundell was a schoolgirl, the scion of England's most distinguished Catholic family. When she first saw him while walking at a seaside resort, Richard Burton had already made his mark as a linguist (he was fluent in twenty-nine languages), scholar, soldier, and explorer--at once a symbol of Victorian England's vision of empire and an avowed rebel against its mores. When she turned and saw...