Marcello's set of six cello sonatas was published as both Op.1 (in Amsterdam) and Op.2 (in London). Op.1 was also assigned to a set of flute sonatas, and a set of 12 Concerti a cinque.
Difficulty guide: 6
Difficulty level, roughly compared to ABRSM exam grades. 0 is total beginner, 9 is advanced (beyond grade 8).
