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 "Op. 2" – that can either be played as piano trios, as violin sonatas or simply on the piano.
This edition contains both marked and unmarked string parts.