LLANAELHAIARAN, or LLANHAIRN, a parish, with a small village, in Pwllheli district, Carnarvon; in the Lleyn peninsula, 5½ miles N by E of Pwllheli, and 7 SW by S of Nanttle r. station. It has a post office under Pwllheli. Acres, 6,698; of which 220 are water. Real property, £2,885; of which £250 are in quarries. Pop in 1851,616; in 1861,736. Houses, 151. The increase of pop. arose from the extension of granite quarries. The property is divided among a few. Yr-Eivel or Rivel mountains, with Vortigern's pass, are on the coast; they rise, with great abruptness, to an altitude of 1,868 feet; and, as seen from the head of the pass near the village, they present a magnificent escarpment of frowning precipices. The ancient fortified British town of Tre'r Caeri is within the fastnesses of these mountains; and, though utterly unknown to record, is one of the most interesting and perfect antiquities of its class in the kingdom. It consists of several groups of cells or cyttiau, surrounded by a wall enclosing upwards of 5 acres, being more than 300 yards from E to W. The inner wall, which is very perfect, is in many places 15 feet high, and in some 16 feet broad; and has a parapet and walk upon it. There.are nine groups of cells of varions forms,-round, oval, oblong, square, and in some instances a combination of hexagonal chambers leading to a circular one. ''Traces exist of copper and manganese. The living is a rectory in the diocese of Bangor. Value, £225. Patron, the Bishop of Bangor. The church stands on cliffs, overlooking Carnarvon bay; and is later English and cruciform. Charities, £7.

(John Marius Wilson, Imperial Gazetteer of England and Wales (1870-72))