Referenced in:

• mss: 246 - Durham, Cathedral Library, B. IV. 9 173 and n. 28
• mss: 511 - London, Lambeth Palace Library, 218, fols. 131-208 169-77
• facs: 808.7 - Chicago, Newberry Library, fragm. 15 pls. VI(a)-(b) [Epist. cxlix], VII(a)-(b) [Epist. clv, cxxxvi]
• mss: 808.7 - Chicago, Newberry Library, fragm. 15