Beloved as the city of light, Paris in the nineteenth century sparked the acclaim of poets and the odium of the bourgeois with its distinctive sounds. Street vendors bellowed songs known as the Cris de Paris that had been associated with their trades since the Middle Ages; musicians itinerant and otherwise played for chan≥ and fl'neurs-writers, fascinated with the city's underside, listened and recorded much about what they heard. Aimée Boutin...