La belle Hélène
In the mid-19th century, John Lawrence Toole established his comedic reputation at the Adelphi. Also in the mid-19th century, the Adelphi hosted a number of French operettas, including "La belle Hélène". In 1867, however, the Adelphi gave English comic opera a boost by hosting the first public performance of Arthur Sullivan's first opera, "Cox and Box".