In 1887, John Bartholomew's Gazetteer of the British Isles described Llanbadarn Fawr like this:
Llanbadarnfawr.-- par. and vil., Cardiganshire, in N. of co.- par. (containing Aberystwith), 52,750 ac. (330 water), pop. 14,399; vil., on river Rheidol, 1 mile E. of Aberystwith; P.O.
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 Llanbadarn Fawr 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 Llanbadarn Fawr and units named after it.
GB Historical GIS / University of Portsmouth, History of Llanbadarn Fawr, in Ceredigion and Cardiganshire | 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 "Llanbadarn Fawr".