 Mahler's original score (manuscript and first published edition, as well as Zemlinsky's piano duet arrangement) placed the Scherzo second and the Andante third; but during rehearsals for the work's first performance the composer decided that the slow movement should precede the scherzo, and he instructed his publishers C.F.Kahnt to begin production of a 'second edition' of the work with the movements in that order, and meanwhile to insert a printed instruction in all existing scores.This revised, 'second thoughts' ordering was observed by Mahler in every one of the three performances he gave; it is how the second edition of the symphony was published; and it is how the work was performed by others in the three additional performances that the work received during the composer's lifetime.