MONMOUTH, a borough and market-town and parish, having separate jurisdiction, though locally in the lower division of the hundred of Skenfreth, county of MONMOUTH, of which it is the chief town, 130 miles (W. N. W.) from London, containing 4164 inhabitants. This place, which derives its name from being situated at the mouth of the river Monnow, is by some antiquaries supposed to have been the Blestium of Antoninus, but no Roman antiquities have been discovered to confirm that opinion. It was a place of considerable importance during the time of the Saxons, who, to secure their conquests between the Severn and the Wye, and to repel the frequent incursions of the Britons, erected a stately castle, and fortified the town with walls of immense strength; of the former, a small portion is still remaining, and of the latter, one of the gateway towers, at the entrance from the Ross road, is almost entire, and several other vestiges may be traced in various parts of the town. At the time of the Norman Conquest, it was bestowed upon William Fitz- Baderon, one of the Conqueror's followers, who, irom that circumstance, assumed the name of William