CAERLION, (Monmouthshire) 112 cm. and 141 mm. from London, has a wooden bridge over the Usk, where it has a harbour for barges. 'Twas formerly the quarters of a Roman legion, as the name signifies; had 3 noble Chs. an U. the see of an A.Bp. (removed afterwards to St.David's); and K. Arthur is said to have kept his court here. It was elegantly built by the Romans with brick walls, about 3 m. in compass; had sumptuous edifices, besides baths; and among other antiquities Roman bricks are often dug up here. Here is a Mt. on Th, and Fairs on W., before Easter, May 1, July 20, Sept. 20. It is said to have extended heretofore to St. Gilian; and is supposed to have been a very strong place in the R. of Hen. II. when it defended itself a long time against the English; and, according to Giraldus, it had then many footsteps of its ancient grandeur, but it is now become a small inconsiderable T.