A sensational discovery was made in 1988 when two sheets containing 60 additional measures of the celebrated Rondo K. 371 were found. Robert Levin filled in not only this movement, but also the equally fragmentary Konzertsatz K. 370b that belongs to it. The preface reads in parts like a crime novel when Levin relates how he put together the various parts, supplemented them and orchestrated them in a Mozartian manner. It is to his flair and intuition that we owe the recovery of Mozart's Horn Conc...