The English engagement of Mlle. Alboni the following year at Covent Garden was at a salary of four thousand pounds, and the popularity she had accomplished in England made her one of the most attractive features of the operatic season. Her delicious singing and utter freedom from aught that savored of mannerism or affectation made her power of captivation complete in spite of her lack of dramatic energy. She sang in the same company with Grisi, Persiani, and Viardot, while Mario and Tamburini added their magnificent voices to this fine constellation of lyric stars. When she returned to London in 1849, Jenny Lind had retired from the stage where she had so thoroughly bewitched the public, and Mlle. Alboni became the leading attraction of Her Majesty's Theatre, thus arraying herself against the opera organization with which she had been previously identified. Among the other members of the company were Lablache and Ronconi. Mlle. Alboni seemed to be stung by a feverish ambition at this time to depart from her own musical genre, and shine in such parts as _Rosina, Ninetta, Zerlina_ ("Don Giovanni ") and _Norina_ ("Don Pasquale"). The general public applauded her as vehemently as ever, but the judicious grieved that the greatest of contraltos should forsake a realm in which she blazed with such undivided luster. It is difficult to fancy why Alboni should have ventured on so dangerous an experiment. It may be that she feared the public would tire of her luscious voice, unperturbed as it was by the resistless passion and sentiment which in such singers as Malibran, Pasta, and Viardot, had overcome all defects of voice, and given an infinite freshness and variety to their tones. It may be that the higher value of a soprano voice in the music market stirred a feeling in Alboni which had been singularly lacking to her earlier career. Whatever the reason might have been, it is a notorious fact that Mlle. Alboni deliberately forced the register upward, and in doing so injured the texture of her voice, and lost something both of luscious tone and power. In later years she repented this artistic sin, and recovered the matchless tones of her youth in great measure, but, as long as she persevered in her ambition to be a _soprano_, the result was felt by her most judicious friends to be an unfortunate one.