On October 19, 1814 – 206 years ago today – Franz Schubert composed his first masterwork, the song Gretchen am Spinnrade – “Gretchen at the Spinning Wheel” – for solo voice and piano, on a text by Johann von Goethe. Schubert was 17 years old. It is an enduring and, in the end, unanswerable question: how many songs did Franz Schubert compose?