For two violoncellos and continuo or bass (bass line only, unrealized). Transcribed by Luigi Silva. Cover title. Manuscript in the hand of Luigi Silva. Violoncello lines in ink; bass line of continuo sketched in pencil. Sonata 11 followed by an alternate version ("Sonata 11, alternate"). Sonata 9, unfinished: rhythms sketched, but notes not filled in. Sonata 12 includes first solo cello line and bass only; last section (from measure 23) omits bass. Score only. 1 ms. score (80 leaves) ; 32 cm