By the age of 17, Schubert was teaching at his father’s school. He had been rejected by the army because he was too short (shorter than five feet) and his sight was very poor. He still had composition lessons from Antonio Salieri. He often went to the opera where he heard some of the finest music of the time. He liked reading. One of his favourite books was Goethe’s "Faust". He wrote a song called "Gretchen am Spinnrade" which is about the young girl in the book sitting at a spinning wheel dreaming of her lover. The piano has a gentle accompaniment which sounds like the throbbing of the spinning wheel. The music stops for a moment when the girl imagines her lover is kissing her, then the piano gradually starts again. It is a very famous song. Another song which soon made him famous in all Europe was "Erlkönig". When it was first published another composer whose name was also Franz Schubert, thought that somebody had published a song in his name because the music publishers sent it to him for correction. He sent a very angry letter back saying he had not composed that rubbish.