1. Cotton MS Vitellius A XI, ff 3–37 Reference (shelfmark): Cotton MS Vitellius A XI, ff 3–37 Title: John Beleth, Summa de ecclesiasticis officiis (3r–37v); Nigel Witeker, verses on the archbishops of Canterbury from Augustine (597–604) to Richard of Dover (1174–1184) (37v: Walther 7883) Collection Area: Western Manuscripts Languages: Latin Date Range: 4th quarter of the 12th century Extent: 1 item