Anna forced the sisters inside every day for music lessons — the piano for both girls, as well as the harp for Andrée (like her mother) and the violin for Huguette, who ended up owning three violins by Stradivari at the same time. Altogether, the Clarks owned at least seven Strads at one time or another, including the four instruments that Anna Clark lent to form the Paganini Quartet.