CAERNARVON CASTLE. CAERNARVON is an ancient borough town, a favourite watering place, and enjoys the benefit of a considerable export trade in slates of the best quality, besides the supply of the interior with wines, coal, earthenware, &c. It is surrounded by walls, the space enclosed resembling the form of a harp, the royal castle being the head or termination of the upright arm, and a fine, broad, marine terrace outside it, now constitutes the chief promenade of inhabitants and visiters. The local position of Caernarvon is extremely beautiful,—the town walls, and long terrace are washed by the sea in front; the river Seiont flows round the castle walls, and meets the waters of the Mænai beneath its lofty turrets, while Coed-Helen Mount impends over the town on the south, Twt-Hill on the North, and Moel Eilio and the Snowdonian range cross and terminate the distant view. There is a striking similitude between the natural position of Algiers and that of the town of Caernarvon, as seen from the water. Twt Hill corresponds with the Jewish cemetery; there is a mount also hanging over Algiers on the right, and the terrace of Caernarvon is an exact miniature of the famous thousand-gun battery of the Turkish city, though happily deficient in such a supply of dread artillery. The name Caernarfon is compounded of the British terms _Caer yn ar-ffon_, or _Mon_, the citadel in Arfon, or in the district opposite to Mon (Anglesea). It was the ancient Segontium of the Romans, and was the only post of consequence in this part of Cambria over which the imperial eagle flapped his wings. Some fragments of a Roman wall are still distinguishable near the town, and outposts, roads, and encampments yet survive in the immediate vicinity. Upon the final subjugation of the ancient Britons, in the year 1282, King Edward the First commenced the building of a noble castle at Caernarvon. This he designed for his royal palace; and mixing up some soothing artifices with the vigorous measures of a conquering prince, caused his faithful and much beloved queen to be brought hither, at an interesting moment of her life, where she gave birth to Edward, afterwards sirnamed Caernarvon. This was the second wily stratagem practised upon the obstinate Welshmen by King Edward. His first attempt to render their fetters less galling, was made by assimilating the form of the fortifications of Conway and Caernarvon, which were actually species of state prisons, to the likeness and disposition of the arms of a harp.