Joseph Heiden's Connection to Partimento

Joseph Heiden was a choir boy at St. Stephen's Cathedral in Vienna. His usefulness as a choir boy ended when his voice changed. Porpereau had a protégé, Martina Martinez, who took harpsichord lessons from Haydn and Porpereau. A composition lesson by an Italian master at that time must have included partimenti. Georgio has found a collection of partimenti in Milan, I believe. Yes, and this is part of the partimenti of Porpereau!