The Gentleman in Black

The Gentleman in Black is a two-act comic opera written in 1870 with a libretto by W. S. Gilbert and music by Frederic Clay. The "musical comedietta" opened at the Charing Cross Theatre on 26 May 1870. It played for 26 performances, until the theatre closed at the end of the season. The plot involves body-switching, facilitated by the magical title character. It also involves two devices that Gilbert would re-use: baby-switching and a calendar oddity.