In the original Cantus index for this manuscript, differentiae were identified with a two-digit system, whereby the first character indicates the last note of each differentia and an arbitrarily-assigned number distinguishes between differentiae of the same mode that end on the same note.
Mitchell, Andrew. Inventory of Rouen, Bibliothèque municipale, 248 (olim A. 339). Edited by Debra Lacoste. In: Cantus: A Database for Latin Ecclesiastical Chant: Inventories of Chant Sources. Directed by Debra Lacoste (2011-), Terence Bailey (1997-2010), and Ruth Steiner (1987-1996). Web developer, Jan Kolácek (2011-).
Differentiae indexed in consultation with a microfilm facsimile of the manuscript.
Standardized manuscript tonary completed by Rebecca Shaw (Dalhousie University) on March 11, 2018. Edited by Jennifer Bain, Sister Ilaria Culshaw, Lucia Denk, Brayden Olson, and Rebecca Shaw (Dalhousie University) on June 18, 2019.