LLANVAIR-YNGHORNWY (LLANFAIR-YN-NGHORNWY), a parish, in the hundred of TALYBOLION, union of ANGLESEY and county of ANGLESEY, NORTH WALES, 8 miles (N. W.) from Elanerchymedd; containing 857 inhabitants. This parish, which is of small extent, is situated at the northwestern extremity of Anglesey, 'near Cemlyn bay, and almostAirectly opposite to the Isle of Skerries; .the name in Welsh implying "Saint Mary% in the Promontory." Its surface is boldty varied, and in mime parts rises into abrupt and rugged eminences: the scenery is strikingly diversifl , and the views, extending on the west over St. George's Channel, and on the north to the Irish Sea, comprehend many interesting objects, and are finely contrasted with those over the adjacent country on the east, which embrace a rich variety of rand and picturesque 'features. Near Cemlyn bay is a fine quarry of serpentine marble, of the species called vend antique, which is intersected with veins of asbestos, of a beautiful silky texture: this marble is more highly esteemed than the finest specimens from Italy, and many of the slabs obtained here have produced very large Sums; the asbestos found here is superior in softness and brilliancy to any yet 'discovered in Europe. Among the mineral productions of the parish are likewise steatite, or soap- rock, and amiamhirs. There is safe anchorage for small vessels on the coast, in Cemlyn, or Crooked Pool bay, which might at little expense be rendered a safe port, and even a serviceable dock might easily be constructed in it The living is a perpetual curacy, 'anneted to the rectory of Llandensant: the tithes have been tom-muted fora rent-charge of £195; and there is a house with a glebe of above 04 acre*, the 'whole valued at £126 per minims. The church, dedicated to St. Mary, is a spacious structure, partly in the Norman style, with a lofty square touter Of rude architecture at the west end; and consist* of a nave and double chancel, the latter divided by a 'series of mataive octagonal pillars and arches: the south chancel be.' longs exclusively to the proprietor of the Monachtt estate, in the parish; and the north, which is the burial place or vault of the family 'of Williams, Of Friars, contains many elegant monuments to Mem,. bets of that family, and of the Bulkeleys: upon one of the pillars that separate the chancel is a very ancient inscription in rude Saxon charactets, « Sancta Maria ora pro nobu." There are plates of worship for Wesleyans. A Sunday school, appertaining to the Methodists, and consisting of about 115 males and females, was commenced in 1819, and Is supported by voluntary i luntary contributions. Monaelitt, the estate above mentioned, Supposed by Sonte writers anciently to have been the site of a religious bodge, was granted by Liewelyn ab Grofydd as part of the endowment of the abbey that he founded at Abetconway, from which circuinstanee it derived its pre.. sent appellation, and the exemption froth tithes which it still enjoys. Cadet Monachtt is an elevated point on this estate, well suited for the erection of a lighthouse, as it is opposite to the Sherries, and forms the north-eastern entrance into Holyhead bay, and is also distinguished by three land-marks, consisting of narrow white stone walls tapering to a point, and of considerable height. Near the church are three upright stones of large dimensions, placed in the form of a triangle, at a distance of six hundred yards from each other, and called Meini Hirion, or " 'the Stones of Heroes;" and near the same place are the remains of an extensive circular camp, termed Castell Crwn, surrounded by a vellum and fosse.