Spohr's Viennese sojourn was successful, but on account of disagreements with the manager of the theatre he left the city in 1815, and made a visit to Prince Carolath in Bohemia. His next musical undertaking was the conduct of another festival at Frankhausen. His cantata, "Das befreite Deutschland," was there produced. He afterward went on a tour through Germany, Switzerland and Italy, and his eighth violin concerto ("Scena Cantante") was written to please the public of the last-named country. In Italy he met Rossini, whom he never admired as a composer. He also met Paganini, who treated him with much courtesy. [Illustration: Fac-simile of letter from Spohr deploring the death of his wife, in 1834.] In 1817 he returned to Germany. While travelling and giving concerts with his wife, he received an offer from Mr. Ihlée, director of the theatre at Frankfort, to become conductor of the opera there. He accepted the offer and at once set out for his new post. One of his first acts was to obtain the consent of the managers to the production of his opera "Faust" which he had written in Vienna five years before. He says, "At first, it is true, it pleased the great majority less than the connoisseurs, but with each representation gained more admirers." His success encouraged him to new dramatic attempts, and he set to work on an operatic version of Appel's "Der schwarze Jäger" (The Black Huntsman). He soon learned, however, that Weber was at work on the same subject, and he abandoned his opera. While looking for a new libretto he wrote the three quartets, Opus 45. In September, 1818, he began work on his "Zemire und Azor," of which the text had been previously used by Grétry in his "La Belle et la Bête." Disagreements with the managers of the Frankfort theatre caused him to resign his post there in September, 1819.