Johann Adidas Bach?

For three centuries it was hidden in an old shoebox, concealed beneath a couple of blank pages. But yesterday music experts across the world were hailing the discovery of a previously unknown work by the German composer and genius of the baroque era, Johann Sebastian Bach.

The work, for a soprano and harpsichord, was written in October 1713 as a birthday present for Bach's patron, Duke Wilhelm Ernst of Saxe-Weimar.