ISCLYDACH (IS-CLYDACH), a hamlet, in the parish of LLYWEL, hundred of DEVYNOCK, county of BRECKNOCK, SOUTH WALES, 15 mile
(E.) from Tr& castle, containing 362 inhabitants. The name signifies below the Clydach, which stream bounds this hamlet on
the west, and the river Usk on the south, where it is crossed by a bridge on the road from Brecknock to Trecastle. The
vale through which the former stream flows is pleasingly diversified and well wooded, and, as well as the banks of the
Usk, is ornamented with several agreeable residences. The chapel of Rhfql y briw is situated in this hamlet, on the left
bank of the Usk, having been originally erected, as is supposed, for the convenience of the family of Penry of
Llwyncyntevin, and subsequently supported by the contributions of the inhabitants of the vicinity, who subscribed forty
shillings per annum towards the stipend of a clergyman. The living is now a perpetual curacy, in the archdeaconry of
Brecknock, and diocese of St. David's, endowed with £800 royal bounty, and in the patronage of the Vicar of Llywel. From
the circumstance of one of the pieces of ground, purchased in Glamorganshire with the above-mentioned endowment, having
valuable beds of coal, discovered subsequent to the purchase, this curacy has become more valuable than the superior
benefice of Llywel. The rites of sepulture, marriage, and baptism have for some time been celebrated here, though with
what right is questionable. About thirty years ago the curate was licensed on the nomination of the owners and occupiers
of land in this hamlet, the vicar not choosing to assert his claim. There is, for distribution among the poor, a small
bequest of 41 per annum, made by Roger Jeffreys, in 1714, being a rent-charge on lands near the chapel. The average annual
expenditure for the support of the poor amounts to £209. 1.