Difficulty level, roughly compared to ABRSM exam grades. 0 is beginner, 9 is advanced (beyond grade 8).
Sonata RV9 (op.2/11) for Violin & continuo written in 1709 and published in Venice & Amsterdam with a dedication to Frederich IV of Denmark.
Sonata RV40 for Cello & Continue was composed between 1720 & 1730 and published in Amsterdam in 1740.
The Continuo part has been released for Harp(with pedal indications), and the Violin & Cello parts have been transcribed for Flute