The son of Lewis Maurice, who descended from the Moeliwrch family in Llansilin, by Jane, daughter of John Holand, vicar of Guilsfield (1586-1639), he spent his life at Cefn-y-braich or Ty Newydd in Cynllaith, Llansilin. It is said that he erected a building of three stories, locally known as ‘the Study,’ to house his library.
He had sufficient means to collect books and manuscripts, to employ copyists, and to spend his time copying and studying manuscripts. In these studies he regarded Robert Vaughan of Hengwrt as his Gamaliel. He worked much at Hengwrt and compiled a catalogue of the manuscripts in the collection. He himself acquired some important Welsh manuscripts, e.g. the ‘White Book of Hergest,’ which was lost in a fire at a bindery in Covent Garden in 1810, and the manuscript of the Welsh laws which his cousin Meredith Lloyd of Bryn Elen gave him (Wynnstay MS. 36). He transcribed a considerable body of Welsh poetry, and made a pioneer study of the texts of the Welsh laws in his ‘Deddfgrawn’ or ‘Corpus Hoelianum’ (Wynnstay MSS. 37-8) in 1660-3. He was interested in the early history of Wales and the Celts. He wrote a letter on Brennus to Robert Vaughan in 1662 (Wynnstay MS. 12). Contemporary problems also engaged his attention, and, in 1653, he wrote a treatise against altar-worship in which he criticised the work of Dr. George Griffith, afterwards bishop of S. Asaph, and Richard Jervis, vicar of his own parish. He is also said to have compiled a chronicle of the events of the Civil War in North Wales. Evan Evans (see Panton MS. 72) listed over 100 manuscripts which were in his possession or had been written by or for him.
He was twice married (1), to Lettice, daughter of Roger Kynaston, Ruabon, by the daughter and heiress of Roger Eyton of Cefn y Carneddau; by her he had three sons who died young, and two daughters — Ann, wife of David Williams of Glan Alaw, brother of (Sir) William Williams (1634 - 1700), Speaker of the House of Commons, and Lettice, wife of Roger, son of Thomas Gethin of Maesbrook; (2) to Elizabeth, daughter of George Ludlow of Morehouse, and widow of Thomas Gethin, and by her he had one daughter, Elizabeth, who married George Jukes of Pool. In 1678 he had a share in (Sir) William Williams's attempt to purchase the Hengwrt library.
He was buried at a great age at Llansilin, 23 March 1680. His library he left to his daughter, Lettice. It was valued, in 1682, from a list, at £60 by Edward Millington, and sold to (Sir) William Williams. Until about 1771 it was kept at Llanvorda, and then removed to Wynnstay, where it was practically all lost by fire, 5-6 March 1858. In addition to the manuscripts cited, the chief surviving manuscripts in the hand of William Maurice are Llanst. MSS. 15, 31, 54, and 197. In some of his manuscripts he used a Welsh orthography peculiar to himself, and no manuscript was too precious for him to disfigure with his scrawl.
Published date: 1959
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