As the title suggests, Busoni did not include the music from Don Giovanni, shortening the currently known manuscript of more than 597 bars by 245 bars.
Kenneth Hamilton, in his review of Howard's later edition, notes that "for reasons of personal psychology that we can only guess at, [Busoni] chose to give the impression in his preface that he had expanded, rather than drastically cut, Liszt's manuscript."[REF]