Oxford, GB, Bodleian Library, MS Rawl.c.400 B Date:1300 -1400 Date Quality:? Dimensions:Unknown xUnknown Type:Music Shelfmark:MS Rawl.c.400 B Provenance:Unknown Provenance Contents:Roll fragment with Office of St. Margaret on verso. Bibliography:Dittmer, Luther A. “An English Discantuum Volumen.” Musica Disciplina 8 (1954): 19–58. Hohler, Christopher. “Reflections on Some Manuscripts Containing 13th Century Polyphony.” Journal of Plainsong and Medieval Music Society 1 (1978): 2–38.