In 1887, John Bartholomew's Gazetteer of the British Isles described Rhuddlan like this:
Rhuddlan.-- (or Rhyddlan), parl. bor. and par., Flintshire, on river Clwyd, 3 miles N W. of St Asaph and 7½ NW. of Denbigh by rail - par. (containing Rhyl), 4730 ac., pop. 7426; bor. (extending into St Asaph par.), 3272 ac., pop. 1242; P.O., T.O. Rhuddlan was anciently a place of importance, and has the ruins of a castle of great strength said to date from the beginning of the llth century, the remains of an old religious establishment, and a fragment of the building where Edward I. ...
held his Parliament in 1283. Between the town and the sea, 3 miles distant, is Rhuddlan Marsh, where the Welsh, under Caradoc, were defeated in 795 by the Saxons, under Offa king of Mercia. The river is navigable by small vessels up to Rhuddlan, where it is crossed by a 2-arch bridge, built or improved in 1595. It is one of the Flint District of Parliamentary Boroughs, which returns 1 member.
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 Rhuddlan has changed, please see our redistricted information for the modern district of Denbighshire. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Rhuddlan and units named after it.
GB Historical GIS / University of Portsmouth, History of Rhuddlan, in Denbighshire and Flintshire | Map and description, A Vision of Britain through Time.
Date accessed: 21st October 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 "Rhuddlan".