Manuscripts, estate records and papers of the Wynne family of Bodewryd, Anglesey, including records of the Bodowyr estate (Bodedern), Anglesey, and Plas Einion estate, Denbighshire, and papers of the Owen family of Penrhos, Anglesey; important Welsh literary manuscripts, legal manuscripts relating to civil and ecclesiastical law; the antiquarian collections of Edward Wynne, chancellor of Hereford, relating to Wales and to the diocese of Hereford, and part of the collection of Humphrey Humphreys, bishop of Bangor and later of Hereford; letters to Humphrey Humphreys, 1691-1709 (mainly 1705-1709); Wynne family correspondence, 1613-1816; legal papers, [17 cent.]-[18 cent.], especially relating to a lengthy action between Chancellor Edward Wynne and the Mostyn estate following the purchase by Wynne of the Bodowyr estate, 1721-1746; estate, personal and household accounts, 1603-1753; and title deeds, [13 cent.]-1864.