Madeline and the Gypsies. Ludwig Bemelmans. Viking Press, New York, 1959. First edition.
Pepito, the son of the Spanish Amassador invites Madeline and her fellow students to a Gypsy carnival. However, in the chaos caused by a sudden rainstorm, Miss Clavel and the other girls lose sight of Madeline and Pepito. The two children find themselves guests of the gypsies, and soon wind up part of the carnival themselves.