Flyleaves to a 75 folio manuscript from the library of John Angeli Altaemps, containing Lives of Cicero and Virgil. The flyleaves served originally as covers and now as endpapers; they were originally c. 300 x 220 mm. According to Besseler the leaves are perhaps from a north Italian manuscript; according to Fischer they come from a peripherally Florentine manuscript of the late 14th century. Cuthbert (p. 300) numbers the music containing parts of this manuscript as f. Ir/v and f. IIr/v., explaining that they were originally the other way round:
f. Ir [originally verso]
f. Iv [originally recto]
f. IIr [originally verso]
f. IIv [originally recto]
Curthbert also points to the unidentified work, item no. 3: 'The presence of additional music was noted by Fischer in RISM B IV 4 (p. 1033).'