GLYN-COLLWYN, a chapelry, in the parish of LLANVIGAN, hundred of PENCELLY, county of BRECKNOCK, SOUTH WALES, 10 miles (S. S. E.) from Brecknock, containing 274 inhabitants. This place, of which the name signifies "the glen of hazel wood," is pleasantly situated on the upper part of the small river Carvanell, which falls into the Usk at Tal y Bout. The living is a perpetual curacy, in the archdeaconry of. Brecknock, and diocese of St. David's, endowed with £1000 royal bounty, and in the patronage of the Rector of Llanvigan. A cairn in this chapelry was opened within the last thirty years by a person named Twm Bich, who came to this place from North Wales, in the hope of finding treasure, to which he is said to have been prompted by the perusal of some ancient Welsh verses. In the prosecution of his search a large kist was found, in which were various antiquities, but none of them have been preserved; as the finder, disappointed in his expectations of a different kind of treasure, sold them to an itinerant Jew.