TREV-HELYG, a township, in that part of the parish of CASTLECAER-EINION which is in the upper division of the hundred of
CAWRSE, county of MONTGOMERY, NORTH WALES: the population is included in the return for the parish. It is a detached
township, bounded on the east by the river Severn; and the Montgomeryshire canal passes through it in a parallel line
with that river, and also the road from Welshpool to Newtown. It is within the liberties of the borough of Welshpool.