In the spring of 1750 a two-day series of riots erupted in Paris when the populace discovered that police were sweeping children off the streets in an overzealous attempt to control vagrancy. Arlette Farge and Jacques Revel use this bizarre incident and its colorful cast of actors to view broader issues such as the power of rumor, mob psychology, the exercise of authority, and the maintenance of peace in Paris under the ancien r gime.