In Heidelberg Brentano collaborated with Arnim in the publication of _Des Knaben Wunderhorn_ and with Görres in _Die Geschichte des Uhrmachers BOGS_ ("Story of Bogs, the Watchmaker"). He had already published several works on his own account--_Ponce de Leon, die lustigen Musikanten_ ("The Merry Musicians"), _Chronika eines fahrenden Schülers_ ("Chronicles of a Roving Student"). In Frankfort he became entangled in a love affair, which led to one of the many tragi-comic episodes in his life. He ran away with a young girl who had fallen violently in love with him, Auguste Busmann, a niece of the famous banker, Bethmann. They went to Cassel, where he married her. It is said that he tried to escape from her on the way to church, but that the energetic bride held him fast. A few days after the ceremony she threw her wedding-ring out of the window. One of her fancies was to dash through the town on horseback, the long plumes of her hat and the scarlet trappings of her horse floating in the wind. She plagued her husband in many ways. We are told that one of the worst tortures he had to endure was caused by her skill in beating a tattoo with her feet against the footboard of the bed, a performance invariably followed by a skilful _pizzicato_ played with her toe-nails upon the sheet.[3] This and other things grew so unendurable that he ran away. The valiant lady procured a divorce the same year, and was ere long married again. Brentano settled in Berlin, and was soon in great request in social circles there, on account of his powers of conversation, his whimsicality, and his rocket-like sallies of wit. It was in Berlin that he wrote his fairy-tales and most of his _Romanzen vom Rosenkranz_ ("Romances of the Rosary"). His play, _The Founding of Prague_, was written in Bohemia, where lay the family estate, Bukowan, of which the younger brother, Christian, took charge. After his return to Berlin in 1816, he wrote the famous tale, _Geschichte vom braven Kasperl und der schönen Nannerl_ ("Story of Brave Kasperl and Fair Nannerl"), also _Die mehreren Wehmüller_, and _Die drei Nüsse_ ("The Three Nuts"). Then his conversion took place, and he no longer lived for literature. The profits of anything he wrote subsequently were devoted to charitable objects. Steffens remarks of Brentano that he is the only one of the Romanticists who seems to be thoroughly aware that he has no aim. He calls him an ironical, sportive Kronos, who fantastically demolishes every one of his definite utterances by means of its successor, in this manner devouring his own children. Still, as a lyric poet, a writer of fairy-tales, and a novelist, Brentano has produced works of art, few in number, but of permanent value.