DREWERN (TREWERN), a township, in the parish of GLISCOME, hundred of COLWYN, county of RADNOR, SOUTH WALES, 7 miles (N. E. by E.) from Builth, containing 203 inhabitants. This place is situated in a valley in the upper part of the parish, near the source of the river Edwy. It comprises one-half of the parish, of which the township of Vainor forms the other. In some places the scenery is of a pleasing character, agreeably contrasting with the contiguous mountains. The mineral springs called Blaen Edwy Wells are situated in this township. A bridge crosses the Edwy here on the road from New Radnor to Builth.