The founder, and the time of its erection are very uncertain; but I refer my readers to the first volume of the _Archæologia_; to an ingenious Dissertation, by Daines Barrington, where it is satisfactorily proved to have been the work of Edward I. This Castle is one of the noblest ruins of ancient architecture now remaining in the kingdom, and exceeds all in bigness, except that of Windsor. The Hall and the Chapel may still be traced; the former measures about seventy feet in length, thirty-four in breadth, and seventeen in height. The roof is vaulted about eight feet high, and supported by twenty arches. On the North side is a chimney, ten feet wide, with two windows on each side, extending down to the floor, and carried above the supposed height of this room. At each angle was originally a round tower of four stories, communicating with each other by a gallery. On the West side of the Hall stairs, is a low round tower, of one story, called the Mint-house, with three painted arches on the South side, and a square well on the West. The leaning tower, towards the East end, more particularly engaged our notice: it is divided into two separate parts, by a large fissure, which runs from the top down almost to the middle. Its lineal projection is supposed to be on the outer side, about eleven feet and a half. On the West and North are visible vestiges of a draw-bridge. The East wall, on the South side of the principal entrance, is fluted between the buttresses, with battlements on their tops, to protect the intermediate walls. At Caerphily we perceived a great change in the manners of the people; in the whole village, scarcely one person was capable of speaking English. We now came to the celebrated vale of Glamorganshire, so justly styled the _Garden of South-Wales_; the rapid Taafe forms an almost continued uproar for many miles; on the opposite side the mountains rose almost perpendicularly in a massy wall, and sometimes to the water’s edge, finely clothed with wood. Every circumstance conspired to heighten the solitary grandeur of the scene, and to prolong the luxurious melancholy, which the views inspired. In this celebrated vale is found the famous Pont y Pridd, or New Bridge, about three quarters of a mile from the Duke of Bridgewater’s Arms, a comfortable inn, and far surpassing our miserable quarters at Caerphily. This wonderful bridge, of one arch, is the segment of a circle; the chord of it is one hundred and forty feet, and the heighth of the key-stone, from the spring of the arch, thirty-two feet and a half. It was erected, in the year 1750, by William Edwards, a country mason, who failed in his attempt three times, till, by lightening the abutments, it has resisted, for many years, the torrents of the Taafe.