TREVLLYS, a township, in the parish of LLANGAMMARCH, union and hundred of BUILTH, county of BRECKNOCK, SOUTH WALES 9+
miles (W. S. W.) from Builth; containing 494 inhabitants. It forms the upper part of the parish, between the rivers Irvon
and Dulas; and the road from Builth to Llandovery passes through the township, which is hilly, but has some clumps of
well-grown timber trees in the valleys: the rateable annual value has been returned at £1655. Here is a day school, in
which about 20 children are educated at their parents' expense. At a place called Llwyn-y-Vynwent tradition reports that a
chapel of ease anciently stood, but no traces of it can now be discovered.