Sources
Appendix I.22. Fuga

Appendix I.22.B.1

Second part of a double leaf, 4° oblong format (33 × 24 cm) with 12 staves.
42 bars (the beginning is missing). The rubric “Altre fuge [sic]”, written at the top of the manuscript, was certainly added later.

45.B.1 is on the first part of the double leaf.