While on the way from Italy to England the musician promised, when he had discharged his obligations in London, to compose an opera for the Royal Theatre in Turin. In 1788 he fulfilled his promise by the production of "Iphigenia in Aulis." This opera was given during the carnival season in Turin, where it was enthusiastically received, and was also performed in other Italian theatres. It was the last work which he wrote for the stage of his fatherland. The impressions produced upon him by the French opera, the works of Gluck, and Haydn's orchestral music had filled his mind with new ideals. Before his visit to Turin, he had already begun to compose the music of "Démophon," an operatic poem by Marmontel, and he now proceeded with the work. This, his first French opera, was performed in the _Academie royale de musique_ on the 2d of September, 1788, but proved only a partial success,--a fact which was due partly to the character of the piece, partly to unfavorable external influences. Before Cherubini was commissioned to undertake the composition for the poem, it had been intrusted to Johann Christoph Vogel of Nuremberg, an imitator of Gluck, but he advanced so slowly with his task that Marmontel became impatient. Vogel had resided in Paris since 1776 and had won many friends for himself through his opera "La Toison d'Or," which appeared in the year 1786. On the 26th of June, 1788, he died, while still in the prime of life, and, as the completed score of "Démophon" was found among his papers, the wish was expressed by many that his composition should be performed before Cherubini's. This, however, did not happen, and a feeling of dissatisfaction existed in consequence. The overture, which was played in February, 1789, at a concert of the _Loge Olympique_, was received with unusual favor, and gave rise to disparaging comments upon Cherubini's work. But Vogel's opera, taken as a whole, could lay as little claim to permanent success as that of his rival, though it was more frequently put upon the stage.