1. Sloane MS 2542 Reference (shelfmark): Sloane MS 2542 Title: Scope & Content: Owners of Manuscripts: Guide, Family of. includes: ff. 1-55 Roger Bacon: De perspectiva: 15th cent. ff. 55 b-59 Nicolas Oresme, Bishop of Lisieux: De motibus spherarum: 15th cent. Collection Area: Western Manuscripts Languages: English Date Range: 15th century Extent: 1 item