‘Jocelyn’ is a four-act opera by Benjamin Godard and is best remembered for Godard's most enduring composition, the tender berceuse (lullaby) for tenor ‘Oh! ne t'éveille pas encore’ commonly known in English as ‘Angels Guard Thee’. Dutch arranger Jos van de Braak transcribed this ´Berceuse´ for Euphonium with accompaniment of a Symphonic Band.