Small-format paper partbook with music copied in a round hand in from both ends (with the book turned through 180 degrees for the copying at the back) towards a blank ruled middle section 66v-142 (apart from a cantus firmus written inverted on 94r), but foliated continuously from front to back ignoring the inversion of the latter copying. The latter images (from 142v) are therefore inverted for readability (so recto/verso appear on left and right pages respectively) and folio numbers after 142r run from the back of the book in reverse to end at 142v to make it easier to follow the pieces in the scroll view.
Inventory provided by John Morehen. No further information.