PENCELLY (PEN-CELLI), a hamlet, in the parish of LLANVIGAN, hundred of PENCELLY, county of BRECKNOCK, SOUTH WALES, 3/ miles (S. E.) from Brecknock; containing 875 inhabitants. It is situated on the western -bank of the Usk, where it is joined by the Mehascyn brook, on which are several mills. The manor of Pencelly anciently formed one great lordship, and was, in the 28th of Edward I., the property of Roger Mortimer, who was summoned to parliament that year by the title of Baron Mortimer, of Pencelly; but in the reign of Edward II. it was divided into English and Welsh Pencelly, and was subsequently converted into five minor lordahips, namely, those of the Castle and the Manor, Pencelly English, Cwm Orgwm, Wenallt, and Welsh Pencelly, to which was afterwards added the adjoining lordship of Scethrog. Of the ancient castle of Pencelly, which stood in the village, about a quarter of a mile to the east of the church, scarcely a vestige is discernible, a mansion of the Herberts having been erected on its site, with a part of its materials; and even of the latter building there now remain only a few rooms and ruined walls, which have been converted into a farm-house. A chapel, dedicated to St. Leonard, stood within the precincts of the castle, but that also has been demolished; it was endowed with a portion of the great tithes, now the property of the lord of the manor. The parochial church is situated in this hamlet, which is in general well wooded and picturesque; there are a few agreeable residences overlooking the Usk. It forms the lower division of the parish, and gives name to the hundred; and its rateable annual value is returned at £2368. The Brecknock canalthrough it, on the banks of which are wrase wharfs for landing coal and limestone for the supply of the neighbourhood.