In April 1764 the Mozart family arrived in London on a concert tour arranged by Mozart�s father Leopold which had already taken them to cities in Germany and to Paris. They were to stay until summer the following year. Received at the English court, Mozart played for the King and Queen, and in January 1765 Leopold Mozart had published a set of six sonatas by his eight-year old son for violin or flute and keyboard, dedicated to the Queen. The sonatas show the influence of the Johann Christian Bach, youngest son of Johann Sebastian, a friend of the Mozart family in London.