Information on differentia
In the original Cantus index for this manuscript, differentiae were assigned a two-digit code that identified the last note of each differentiae and used a number to distinguish between differentiae in the same mode that shared the same last note.
Noone, Michael, and Anna Kijas. Inventory of Franciscan antiphoner, John J. Burns Library, Boston College MS.1996.097. In: Cantus Manuscript 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-).
Images: Franciscan antiphoner (sanctorale) with sequences, circa 1300-1350