1801, the family returned to Salzburg, where Weber resumed his studies with Michael Haydn. Weber composed his third opera Peter Schmoll und seine Nachbarn (Peter Schmoll and His Neighbours) which his teacher approved. After a concert tour in 1802 the Webers returned to Augsburg where it is believed Peter Schmoll premiered. In mid 1803, Weber continued his studies in Vienna with Abbé Vogler, founder of important music schools in Mannheim, Stockholm, and Darmstadt. Another famous pupil of Vogler in Darmstadt was Jakob Meyer Beer, later known as Giacomo Meyerbeer, who became a close friend of Weber. In letters they addressed each other as "brother". Early career 1804–1810 Vogler recommended the 17-year-old Weber for the post of Director at the Breslau Opera in 1804; Weber was offered and accepted the post. He sought to reform the Opera by pensioning off older singers, expanding the orchestra, and tackling a more challenging repertoire. His ambitious and dedicated work as director of the orchestra was acknowledged, though his tempi were frequently criticized as too fast. As the daily routine did not leave sufficient time for his own creative work, Weber did not seek to extend his two-year appointment. After an interlude at the court of Duke Eugen of Württemberg, who resided in Silesia, Weber served from 1807 to 1810 in Stuttgart as private secretary to Duke Ludwig, brother of King Frederick I of Württemberg. Weber's time in Württemberg was plagued with troubles. He fell deeply into debt and became entangled in the financial manipulations of his employer, e.g. the sale of confirmations of ducal service which exempted the purchaser from military service. Weber was arrested and charged with embezzlement and bribery. As he could disprove the allegations, the case was brought under civil law to avoid compromising the de facto manipulator, the brother of the king. Weber agreed to pay the costs (the last payment was made in 1816) and was banished from Württemberg/ together with his father. As a sobering side effect, Weber started to keep a diary to list his expenses and correspondence, and make occasional comments on special events. Weber remained prolific as a composer during this period, writing a quantity of religious music, mainly for the Catholic mass. This, however, earned him the hostility of conservatives working for the re-establishment of traditional chant in liturgy. In his biography of Weber, Warrack notes that Weber was an accomplished guitarist. It was