Valmai beat me to it on the Mozart. I'm particularly intrigued by Pleyel's Allemand which appears as Pleals Allemande in Wiliam Aylemore's (of West Wittering) manuscript of 1796. Ignaz Joseph Pleyel, born in Austria but relocated to Strasbourg, ran a series of highly successful concerts in London in the early 1790s. He bought a Chateau on the proceeds. Aylemore was picking up on the "pop" music of the day. Could it be that he played as a session musician in one of Pleyel's concerts?