Sources
Appendix I.17. [Contrappunto] "Per imitazione"

Appendix I.17.B.1

Full score. Fascicle of 3 double leaves, oblong format, 16 staves, containing a series of three-part contrapuntal exercises for a total of 8 pages of music; pp. 1-2 and 11-12 are blank.
On pp. 3-4: bars of an incomplete contrapuntal exercise. Preceded on p. 3 by Appendix I.16 and followed on pp. 4-10 by Appendix I.18.