Volume III contains the last four sonatas. They present increasing technical challenges, and in particular the 12th sonata is quite difficult. The delightful second movement of the 9th sonata is a Caccia, or hunting piece. The 10th and 11th sonatas see Cervetto spending increasing amounts of time in the cello's upper range. The 11th ends with a lengthy and complex Rondeau. The 12th sonata is the most complex, difficult, and imaginative of the set, with extensive and difficult double-stops throughout. The second movement is the most contrapuntally sophisticated, a real fugue. The last movement is a set of variations on a short Borea. It is unusual in that it presents two variations of the first strain, then two variations of the second strain, and so on through the piece.
Sonata 9: Caccia
Sonata 12: Fuga
