250 years ago in 1760, the German composer Johann Christoph Graupner died. He is a composer who rather languishes in obscurity today, but he is probably best-known as the man who, along with Telemann, unwittingly gave a leg-up to the musical career of Johann Sebastian Bach. In Graupner's anniversary year, Catherine Bott explores this tale of three composers vying to fill the boots of the Kantor of the Thomaskirche, Leipzig - Johann Kuhnau.