"LLYWELL, (or Llewyllt), a parish in the hundred of Devynnock, county Brecon, 11 miles W. of Brecknock, its post town, and 8 from Llandovery. It is situated in a hilly neighbourhood, on the Roman Via Julia Montana, and watered by the river Usk. The parish includes the ward of Trecastle, chapelry of Ysclydach, and the hamlets of Traian-Glas, Traian-Hale, and Traian-Mawr. Woollen goods are manufactured here. The village is considerable. The living is a vicarage in the diocese of St. David's, value £152, in the patronage of the bishop. The church of Llantrisaint is a small ancient structure. There is also the district church of Rhyd-ybryw, the living of which is a perpetual curacy, value £145, in the gift of the vicar. The Independents have a chapel. The parochial charities amount to about £6 per annum."
"LLEWELL, a village in the hamlet of Traian-Mawr, county Brecon, 12 miles W. of Brecknock."
"PENTREFELIN, a hamlet in the parish of Llywell, county Brecon, 11 miles W. of Brecknock. It is situated in a hilly country near the river Usk."
"TRAIAN GLAS and TRAIAN MAWR, hamlets in the parish of Llywell, hundred of Devynnock, county Brecon, 11 miles W. of Brecknock, near the river Usk, under the Black mountains."
"TRECASTLE, a ward in the parish of Llywell, county Brecon, 10 miles W. of Brecknock. It is situated on the river Usk, and belongs to the Marquess Camden. There was formerly a castle, and on the confines of this ward is the Beacon Mountain, 2,594 feet in height."
"YSCLYDACH, a hamlet and chapelry in the parish of Llywell, hundred of Devynnock, county Brecon, 9 miles W. of Brecknock. It contains Pentre-felin, situated among the hills on the Roman road Via Julia Montana, near the river Usk."