KIDWELLY is an ancient corporate and market town, in the hundred of its name, parish of Saint Mary, and county of Carmarthen; 225 miles W. from London, 19 N.W. from Swansea, 9 S. from Carmarthen, and 8 N.W. from Llanelly. This town, formerly of considerably more importance in point of trade than at present, is situated on the river Gwyndrathfach, about half a mile, from its junction with the sea, in Carmarthen bay and about four miles from the port of Pembrey, where are extensive coal works. The coal from these works is said to be the best for smiths' purposes in the kingdom, and particularly adapted for making iron; and is exported to Ireland, Devonshire, Cornwall, &c. The quay is convenient and the harbour safe, and vessels of considerable burden can come close up to the wharf. Copper and lead ores are found in the neighbourhood, and in the vicinity of the town are tin and iron works. The Kidwelly Canal and the Dock Company's Railway pass contiguous to the town, and furnish every facility for transmitting the produce of the district to various parts. The town consists principally of one spacious street, containing some good houses; and its general appearance is clean and neat. It is under the jurisdiction of the Dutchy of Lancaster, and is governed by, a recorder, two magistrates, (one of whom is mayor), twelve other aldermen, and the like number of principal burgesses, assisted by a town-clerk and inferior, officers. Kidwelly is included in the Carmarthen circuit of towns under the County Court Act, for the recovery of debts to any amount not exceeding £20, and sessions are held here quarterly independent of those for the County. Numerous visitors are attracted during the summer season to the beautiful ruins of Kidwelly Castle, a fortress that appears to have been of great strength; it is the property of Earl Cawdor.

The parish church of Saint Mary is a handsome structure: the living is a vicarage, in the gift of. the Crown; the Rev. Thomas Harris is the present Incumbent. A chapel for Wesleyan Methodists and a national school are in the town. The market, which is a well supplied one; is held on Friday; fairs, August 1st, and October 29th. The parish contained, in 1831, 1,681 inhabitants, and in 1841, 1,563.

POST OFFICE, Julia Shankland, Post Mistress. Letters from London and various parts of ENGLAND arrive every forenoon at twenty minutes past eleven, and are despatched at eight in the morning.
Letters from CARMARTHEN, arrive every morning at ten minutes past eight, and are despatched at twenty minutes past eleven in the forenoon.
Letters from FERRY-SIDE, arrive every morning at seven, and are despatched at half past four in the afternoon. From LLANELLY letters arrive at ten minutes past four afternoon, and are despatched at the same hour.