An outstandingly significant feat of Mozart scholarship.... A fundamental reassessment of the early history of 'Cos fan tutte' and a major contribution to its critical evaluation as a work of art. The author's scrutiny of the autograph score unleashes a torrent of information on how Mozart composed the opera, how he changed his mind or felt compelled to change his mind, how the nature of the work itself changed and, most startlingly, a frank exposure...