1. Lansdowne MS 121/13 Reference (shelfmark): Lansdowne MS 121/13 Title: Scope & Content: 13. W. Bourne's Treatise on the property or qualities of glasses (for optical purposes), according to the making, polishing and grinding of them; addressed to Lord Burghley. Collection Area: Western Manuscripts Languages: English Date Range: 13th century-17th century Extent: 1 item