Mozart's name by Mozart scholar Michael Lorenz in the registers of the Lower Austrian Governorship, where in May 1787 "Mozart Wolfgang Amadeus" is referred to as having applied for the return of his written surety for his friend . Other uses of "Amadeus", from immediately after Mozart's death in 1791, are given above. The 19th century saw the gradual victory of "Amadeus" over alternative middle names. The earliest (18th century) biographers of Mozart, such as Friedrich Schlichtegroll and Franz Niemetschek, used "Gottlieb". However, in 1798 the publishing firm of Breitkopf & Härtel began to issue a (partial) Complete Works edition under the
Wolfgang Amadeus Mozart listeners and performers. These developments were not witnessed by Mozart's father, who had died on 28 May 1787. In December 1787, Mozart finally obtained a steady post under aristocratic patronage. Emperor Joseph II appointed him as his "chamber composer", a post that had fallen vacant the previous month on the death of Gluck. It was a part-time appointment, paying just 800 florins per year, and required Mozart only to compose dances for the annual balls in the Redoutensaal (see "Mozart and dance"). This modest income became important to Mozart when hard times arrived. Court records show that Joseph's aim was