1. Egerton MS 823 Reference (shelfmark): Egerton MS 823 Title: TRACTATUS varii Astronomici. Codex membranaceus, sec. xii. Duodecimo. [Bibl. Eg. 823.] Scope & Content: Astronomy: Tractatus varii astronomici. Collection Area: Western Manuscripts Languages: English Date Range: 12th century Extent: 1 item