Leopold Mozart was only able to understand his son’s musical genius in terms of it being a God-given wonder: ''That my boy [”] knows all of this with his 8 years that could be expected of a man of forty years. In short: whoever has not seen or heard it, cannot believe it''. In 1764 Wolfgang composed six sonatas in London ╩ possibly after the model of Johann Christian Bach’s ''Opus 2'' ╩ that can either be played as piano trios, as violin sonatas or simply on the piano. ''Royal'' sources were co