1. Harley MS 1, ff 31r-40v Reference (shelfmark): Harley MS 1, ff 31r-40v Title: Albumasar, De revolutionibus annorum Scope & Content: Albumasar, De revolutionibus annorum, in the Latin translation probably by John of Seville. Collection Area: Western Manuscripts Languages: Latin Date Range: 3rd quarter of the 13th century Extent: 10 folios.