In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Cwmyoy like this:
CWMYOY, a parish in the district of Abergavenny, and counties of Monmouth and Hereford; on the river Honddu, under the Black mountains, 2¾ miles NW of Llanfihangel r. station, and 6½ N of Abergavenny. It contains the hamlets of Fwthog and Bwlch-Trewyn, and the abbey of Llanthouy; and its post town is Llanfihangel-Crucorney, under Abergavenny. ...
Acres, 10, 366. Real property, £3, 303. Pop., 649. Houses, 143. The property is divided among a few. The surface includes grand mountain and glen scenery. The living is a vicarage in the diocese of Llandaff. Value, £68. Patron, John Morgan, Esq. The church is good.
GB Historical GIS / University of Portsmouth, History of Cwmyoy in Monmouthshire | Map and description, A Vision of Britain through Time.
Date accessed: 26th March 2017
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