Some thirty years after the initial publication of Montesquieu's Persian Letters in 1721, the author hinted at the presence of 'a secret, and somehow unnoticed, chain' tying together this entertaining, insightful, yet disparate collection of fictional letters to and from two Persian travelers in France. Ever since Montesquieu's subtle hint, readers have tried to identify the chain, but the riddle has resisted solution. The reason may be that...