Note 73b — Chapter X · TYWY RIVER—CAERMARDYN—MONASTERY OF ALBELANDE

Much has been said and written by ancient authors respecting the derivation of the name of this city, which is generally allowed to be the Muridunum, or Maridunum, mentioned in the Roman itineraries. Some derive it from Caer and Merddyn, that is, the city of the prophet Merddyn; and others from Mûr and Murddyn, which in the British language signify a wall. There can, however, be little doubt that it is derived simply from the Roman name Muridunum. The county gaol occupies the site of the old castle, a few fragments of which are seen intermixed with the houses of the town.