"A parish in the Union of Llanrwst, hundred of Isaled, county of Denbigh, 6 miles (ESE) from Llanrwst. ..... Within this parish, which is situated in the mountainous district of the county, are the sources of the rivers Elwy, Aled and Alwen, upon the first of which, about two miles below its source, the village is pleasantly seated. The surface of the surrounding country is beautifully diversified, and in many parts the scenery is highly picturesque: within the parish are three noble lakes, Llyn Alwen, Llyn Moelvre, and Llyn Aled, the last of which is enclosed on almost every side by mountains covered with dark and barren heath." [A Topographical Dictionary of Wales, 1833 & 1849, Samuel Lewis]
This is a remote and mountainous parish of about 6000 acres, divided into two townships, Is-llan and Uwch-llan. At one time, there were two other townships, Pennant and Cornwal.