"La serenata" (Serenade) - sometimes called "Angel's Serenade" or "Leggenda Valacca" (Wallachian Legend), is a dialogue between a worried mother and a girl who hears an angel's voice calling her. In the end the girl follows the voice ("O mamma buona notte, io seguo il suon, io seguo il suon!"). This work is mentioned in Anton Chekhov's short story "The Black Monk" as well as in other Russian works of the late 19th and early 20th centuries.