"RHÔSDIAU (RHÔS-DDÛ), a parish in the upper division of the hundred of ILAR, county of CARDIGAN, SOUTH WALES, 7 miles (S. by E.) from Aberystwith, containing 152 inhabitants. This parish, which is situated within a few miles of Cardigan bay, is of very small extent. The surface is varied, and in some part mountainous ; and the surrounding scenery is characterized rather by features of rugged boldness than of pleasing or picturesque appearance: the soil in the lower grounds is productive, and the declivities of the hills afford scanty pasturage for sheep and young cattle. Its distance from any great turnpike road renders this place difficult of access, and it has therefore little intercourse, even with the neighbouring places. The living is a discharged rectory, in the archdeaconry of Cardigan, and diocese of St.David's, rated in the king's books at £1.6.8., endowed with £200 royal bounty, and in the patronage of the Bishop of St. David's. The church, dedicated to St. Michael, having for some time been in a state of ruinous dilapidation,was rebuilt in 1816.The average annual expenditure for the maintenance of' the poor is £25. 8."
[From Samuel Lewis's A Topographical Dictionary of Wales 1833]