1. Seal XCI.56 Reference (shelfmark): Seal XCI.56 Title: Scope & Content: Richard, Duke of Gloucester, afterwards Richard III., 19 Edw.. iv. Richard III of England: Cast of seal of, as Duke of Gloucester: 1479-1480. Collection Area: Western Manuscripts Languages: English Date Range: 2nd half of the 15th century Extent: 1 item