1. Cotton MS Julius D V, ff 71–167 Reference (shelfmark): Cotton MS Julius D V, ff 71–167 Title: Roger Bacon, Opus maius (71r–151v: imperfect); Ps.-Roger Bacon, Tres epistole (Tractatus trium uerborum) (T/K 290, 296, 332) (152r–158r, 160r–164r) Scope & Content: Dated: 2nd half of the 13th century to 1st quarter of the 14th century Collection Area: Western Manuscripts Languages: Latin Date Range: 2nd half of the 13th century-1st quarter of the 14th century Extent: 1 item