Sources
Appendix I.20. Cadenza e Basso P. Mattei

Appendix I.20.B.1

Full score. 1 double leaf and 1 single leaf (6 pages total), oblong format, 10 staves, containing fair copies of a series of cadenzas and contrapuntal exercises, some for string quartet. Printed along the left margin of both leaves, perpendicular to the staves: "Proprietà del R. Stabilimento Musicale Tito di Gio. Ricordi – Milano."

From the second system of p. 3 of the double leaf: 4 bars of “Cadenza” for “Violini I II – Viola – Cello,” followed by the indication “Segue il Basso in re magg. del P_Mattei”; on p. 4: “Allo,” 12 bars of counterpoint, incomplete.

For the remaining contents of the double leaf, see 111 and Appendix I.19.