Marcus Cara

Sprightly, so be sure to count in semibreves or breves.

Structure:

At the end of the piece is a custos and "ut supra" (as above) and "Sio douesse, etc" (referring to prior words).

So the structure seems to be

A (B CC D)x B with x being as many verses as you wish (three present). That is A is an introduction played only once, B is the "chorus" and CCD is the verse.