Spohr soon gave two important new works to the musical world, the opera of "Faust," and the cantata, "The Liberation of Germany," neither of which, however, was immediately produced. Weber brought out "Faust" at Prague in 1816, and the cantata was first performed at Franken-hausen in 1815, at a musical festival on the anniversary of the battle of Leipsic, a battle which turned the scale of Napoleon's career. The same year (1815) also witnessed the quarrel between Spohr and Count Palffy, which resulted in the rupture of the former's engagement. Spohr determined to make a long tour through Germany, Switzerland, and Italy. Before shaking the dust of Vienna from his feet, he sold the Von Tost household at auction, and the sum realized was even larger than what had been paid for it, so vivid were the public curiosity and interest in view of the strange bargain under which the furniture had been bought. On the 18th of March, 1815, Louis Spohr, with his beloved Dorette and young family, which had increased with truly German fecundity, bade farewell to Vienna. Two years of concert-giving and sight-seeing swiftly passed, to the great augmentation of the German violinist's fame. On Spohr's return home he was invited to become the opera and music director of the Frankfort Theatre, and for two years more he labored arduously at this post. He produced the opera of "Zemire and Azar" (founded on the fairy fable of "Beauty and the Beast" ) during this period among other works, and it was very enthusiastically received by the public. This opera was afterward given in London, in English, with great success, though the opinion of the critics was that it was too scientific for the English taste. IV.