In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Llandysul like this:
LLANDYSSIL, a village, a parish, and a sub-district, in Newcastle-Emlyn district, Cardigan. The village stands on the river Teifi, at the boundary with Carmarthenshire, and on the Carmarthen and Cardigan railway, 8¼ E of Newcastle-Emlyn; and has a bridge, a railway station, and a post office,‡ under Carmarthen. A weekly market is held on Thursday; a monthly market, on the third Tuesday of the month; and fairs on 2 Jan., 11 Feb., the Thursday before Palm Sunday, the third Thursday after that day, 19 Sept., 31 Oct., and 11 Nov.The parish is divided into Llandyssil-Is-Kerdin, which includes the hamlet of Llanfrene; and Llandyssil-Uwch-Kerdin, which includes the hamlets of Borthin, Capel-Ddewi, Fairdref, Glandysilved, and Llanvair. ...
Acres, 17,556. Real property of L. Is-Kerdin, £3,167; of IL. Uwch-Kerdin, £4,913. Pop. of the whole in 1851,2,930; in 1861, 2,788. Houses, 682. The property is much subdivided. Allt-yr-Odyn, Waun-Ifor, Gilfachwen, and Llanfair are chief residences. Castell-Hywel, once a mansion, is now a farm-house. Castell-Gwynionydd stood near the church; Maelgwm's castle stood at Cilygriaig; and Humphrey's castle stood on the rivulet Cletwr. There are several barrows. The living is two-fold-a vicarage united with the chapelry of Capel-Ddewi, and a sinecure rectory-in the diocese of St. David's. Value of the vicarage, £220; * of the rectory £400. Patron of the former, the Bishop of St. David's; of the latter, Jesus' College, Oxford. The church is partly early English, and was recently in dierepair. There are three recently erected chapels of ease, and chapels for Independents, Baptists, Calvinistic Methodists, Wesleyans, and Unitarians.The sub-district contains also four other parishes in Cardigan and one in Carmarthen. Acres, 40,722. Pop., 5,934. Houses, 1,396.
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 Llandysul has changed, please see our redistricted information for the modern district of Ceredigion. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Llandysul and units named after it.
GB Historical GIS / University of Portsmouth, History of Llandysul, in Ceredigion and Cardiganshire | Map and description, A Vision of Britain through Time.
Date accessed: 13th February 2016
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Llandysul".