LLANLLYVNI (LLAN-LLYFNI), a parish, composed of the Upper and Lower divisions, in the hundred of UWCHGORVAI, union and county of CARNARVON, NORTH WALES, 7 miles (S. by W.) from Carnarvon; containing 2017 inhabitants. The name of this place is derived from its situation on the river Llyvni, which rises in the Nanlle lakes, in the upper part of the parish, and, after a short course, falls into Carnarvon bay. The parish is intersected by the road from Carnarvon to Tremadock, upon which the village is pleasantly situated; and is bounded on the north by Llandwrog, on the south by Clynnog, on the east by Llanvihangel-y-Pennant, and on the west by Carnarvon bay; it extends from three to four miles in length, and from one to two miles in breadth; and comprises 6000 acres by admeasurement, of which 2500 are arable, 1500 meadow, and the remainder sheep-pasture and turbary: a large portion of the land was once common, though a great part has of late years been inclosed, and many houses have been built upon the former wastes. The surroundin4 scenery is strikingly diversified, the parish consisting of a ridge of hills sloping in gentle undulations to the sea, and at the base of which is stretched out a number of lakes and turbaries: two fine pieces of water, called Nanlle, one more than half a mile in length and nearly a quarter of a mile broad, and the other, nearly adjoining it, of equal breadth, but not quite so long, add greatly to the beauty of the scenery, and formerly abounded with fish of superior quality, the quantity of which, however, has been greatly diminished by the influx of water from the copper-works in the vicinity. There are also two smaller lakes in the mountainous parts, named respectively Cwm Silin and Cwm Dillyn, and both of which afford better sport to the angler. One side of the parish is bounded by a fine range of mountains, the appearance of which is highly picturesque; and the lofty Snowdon, though eight miles distant, is seen with more strikingly romantic beauty from the parsonage-house here, than from any other point in the county. The district once formed a part of the forest of Snowdon, but it is now almost entirely denuded of timber, having neither natural wood nor plantations, on which account, being unsheltered, it is exceedingly bleak, and in many parts dreary in appearance. The soil is sandy and .grar - velly, producing chiefly oats and barley, but. the principal source of profit is fat pigs: some of the farms have existed for a very long period, and are mentioned in ancient records as of considerable celebrity. The parish, in common with the adjacent country, abounds with mineral wealth: beds of slate, intersected by veins of copper, extend through the whole of it, in a direction from south- west to northeast; manganese of superior quality has been recently discovered, and considerable quantities are shipped for Liverpool. The principal copper-works are those of Simdda Dylluan and Gwernoer; but the mines are not at present so extensively wrought as formerly; the slate quarries were also worked some years since, upon a very large scale, but the numbers of slates now procured is much less than heretofore. A railroad, eight miles in length, has been laid down from the quarries to the port of Carnarvon, for the conveyance of the slate and other mineral produce to that port, where it is shipped. The return made of the rateable annual value of the parish amounts to £3177. 11. 6. The living is a discharged rectory, rated in the king's books at £7. 17. 6., and endowed with £200 royal bounty; patron, Bishop of Bangor: the tithes have been commuted for a rent-charge of £260; and there is a glebe of above 2i acres, valued at £10 per annum. The church is dedicated to St. Rhedyw, whose tomb within it was destroyed about 60 years since; but his memory is still preserved in the name of a well termed Fynnon Rhedyw, and in that of a. stone called Eisteddva Rhedyw. It is a spacious cruciform structure, supposed to have been enlarged into its present form about the year 1032, which date was discovered above the east window of the ehancel, while repairing it some years since. 'Above the window of the Eithinog chapel, in this church, is an image of St. Rhedyw, which was formerly held in great veneration, but is now nearly defaced. There are two places of worship each for 'Baptists and Calvinistic Methodists, the latter of whom have three Sunday schools, in which are 470, and the former one, in which are 50, males and females; these schools are conducted by gratuitous teachers. A small rent-charge of 10s. left by Richard Evans is distributed at Christmas in bread and money among the poor. No Druidical monuments are actually remaining in the parish, but the existence of such within its limits at some former period is indicated by the names of various fields, such as Y Gistvaen, Cae-y-Cynghor, Tal-y-Garnedd, &c. On the banks of the river Llyvni are the vestiges of an ancient fortification, called Craig-y-Dinas, but whether of Roman or British origin it is not easy to determine:- it is about a mile from Pont-y-Cim, and comprises an area of about two acres, inaccessible, owing to the precipitousness of the ascent, on the side next the river, and defended on the others by two walls of stone, with a fosse between them. In the upper part of this, and also in the neighbouring parishes, are numerous remains of the dwellings of the aboriginal inhabitants, commonly designated Cuttiau 'r Gwyddelod, or the " Irishmen's Huts :" they are either circular or elliptical in form, and generally from five to six yards in diameter: several of them are grouped together within a quadrangular area, inclosed by a single, and in some instances by a double, wall; they also occur occasionally in concentric circles, and when cleared are generally found to contain great quantities of ashes.