“ In 1830 he settled in London, having a connexion with the King’s theatre. His ballet Kenilworth was written in 1831, the ballet Une Heure à Naples in 1832, and the ballet Sir Huon (composed for Taglioni) in 1833. In this latter year he wrote his famous quartet Ecco quel fiero istante. Malek Adhel, an opera, was produced in Paris in 1837. In 1842 he wrote the ballet music of Alma for Cerito, and in 1844 his opera Don Carlos was produced in London. Costa became a naturalized Englishman and received the honour of knighthood in 1869. ”