Esmeralda, a gipsy street singer, is loved by the profligate priest Claude Frollo, who with the assistance of Quasimodo, the deformed bell-ringer of Notre Dame, tries to carry her off by night. She is rescued by Phoebus de Chateaupers, the captain of the guard, who speedily falls in love with her. Frollo escapes, but Quasimodo is captured, though, at Esmeralda's entreaty, Phoebus sets him once more at liberty. In gratitude the dwarf vows himself to her service. Frollo is mad with rage at seeing Phoebus preferred to himself; he assassinates the captain and accuses Esmeralda of the crime. She is condemned to death, but is saved by the appearance of Phoebus, who was not killed after all, and opportunely turns up in time to rescue Esmeralda. Frollo attempts once more to murder Phoebus, but the blow is received instead by Quasimodo, who sacrifices himself for Esmeralda's happiness. When the opera was produced in French at Covent Garden in 1890, the composer introduced several alterations into the score. An elaborate air for Esmeralda in the prison was the most important of the additions, and the close of the opera was also materially changed. It was generally thought, however, that the original version was the more successful. Thomas's training and sympathies were thoroughly French, and except for the words 'Esmeralda' has very little claim to be called an English opera. The score is extremely graceful and charming, and it is only at the more dramatic moments that the composer fails to do justice to his theme. In 'Nadeshda,' an opera written upon a Russian subject, which was produced in 1885, there was much charming music, but the libretto was uninteresting, and the success of the work never equalled that of its predecessor. The most attractive part of the opera was the delightfully quaint and original ballet music, to which local colour was given by clever orchestration and ingenious use of Russian rhythms.