The latest indication of date in the manuscript is the name of Dominic (canonized in 1232) in the kalendar, in the main hand. Apart from that, no clear indications of date have been uncovered. The differentiae of each mode have been numbered with a two-digit system: an upper-case letter indicating the final pitch of the differentia and a sequentially ordered numeral. Differentiae that vary in terms only of immediately repeated notes, presence/absence of liquesence or neumation are give the same differentia code, but are distinguished with a lowercase letter in the first column of the “Extra” field .
The codes for differentiae are consistent with those used for the other Franciscan manuscripts in the database:
Assisi, Biblioteca comunale, 693
Assisi, Biblioteca comunale, 694
Assisi, Cattedrale San Rufino - Archivio e Biblioteca, 5
Budapest, Egyetemi Könyvtár (University Library), lat. 118, 119, 122, 121
Chicago, Newberry Library, 24
Fribourg (Switzerland), Bibliothèque des Cordeliers, 2
München, Franziskanerkloster St. Anna, Bibliothek, 12o Cmm 1
Napoli, Biblioteca nazionale Vittorio Emanuele III, vi. E. 20
- Bannister, Henry Marriott. Monumenti vaticani di paleografia musicale latina. 2 volumes. Lipsia: O. Harrossowitz, 1913.
- Bruning, Eliseus. “Giuliano da Spira e l’Officio ritmico di S. Francesco.” Note d’archivio per la storia musicale 4 (1927): 145-47.
- Felder, Hilarin. Die liturgischen Reimofficien auf die heligen Franciscus und Antonius gedichtet und componiert durch Fr. Julien von Speier (†c. 1250). Freiburg: Universitäts-Buchandlung, 1901.
- Mitchell, Andrew W. “The Chant of the Earliest Franciscan Liturgy.” Ph.D. diss., The Unversity of Western Ontario, 2003.
- van Dijk, S.J.P. and Joan Hazelden Walker. The Origins of the Modern Roman Liturgy: The Liturgy of the Papal Court and the Franciscan Order in the Thirteenth Century. London: Darton, Longman and Todd, 1960.