In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Llandrillo Yn Rhos like this:
LLANDRILLO-YN-RHOS, a parish in the district of Conway, and counties of Carnarvon and Denbigh; on the coast and on the Chester and Holyhead railway, near Little Orme's Head, 3¼ miles NE by E of Conway. It contains the township of Eirias, in Carnarvonshire, and the townships of Cilgwyn, Dinerth, Llwydcoed, Mochtre, Rhiw, and Colwyn in Denbighshire; and the last of these townships has a station on the railway, and a postoffice under Conway. Acres of the Carnarvon portion, 941; of which 110 are water. ...
Real property, £1,245Pop., 295. Houses, 65. Acres of the Denbigh portion. of which £151 are in quarries, and £15 in fisheries. Pop., 1,026. Houses, 219. The property is divided among a few. An old seat of the Vychans and the Conways is under Bryn-Euryn; and an ancient palace of Maelgwyn Gwynedd, prior to his residing at Diganwy, is at Llys-Euryn. A well here, called Fynnon-Eilian, was formerly held in superstitions veneration. The living is a vicarage in the diocese of St. Asaph. Valne, £343. * Patron, the Bishop of St. Asaph. The church stands on an eminence; is a handsome later English edifice, with double aisles; has a tower, with stepped-stepped battlements; and contains a Norman font. Capel-Trillo, about ½ a mile distant, is a rude structure, commonly thought to be of very high antiquity, but probably not really older than the 15th century. The p. curacy of Colwyn is a separate benefice. There are a Wesleyan chapel, and charities £14.
A Vision of Britain through Time includes a large library of local statistics for administrative units. For the best overall sense of how the area containing Llandrillo Yn Rhos has changed, please see our redistricted information for the modern district of Conwy. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Llandrillo Yn Rhos and units named after it.
GB Historical GIS / University of Portsmouth, History of Llandrillo Yn Rhos, in Conwy and Denbighshire | Map and description, A Vision of Britain through Time.
Date accessed: 19th April 2015
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Llandrillo Yn Rhos".