DUNDALK, 40 m. N. of Dublin, is one of the most ancient towns in Ireland, claiming an early foundation from its bay and harbour on the Irish Channel.--Being at the very extremity of what was called the "English Pale," it often became exposed to hostilities, and presented a mass of castles and towers, for the purposes of defence, of which some remains may still be traced. See the remains of an ancient monastery for Crouched Friars, since turned into an hospital: also some ruins of a house of Gray Friars, of which a curious square tower still remains; the prospect from its summit is rich and extensive. Notice the Market-house. Inquire for Dundalk cambrics. See handsome seat of Lord Roden, with curious antique portraits of Hen. VIII. and Anne Bulleyn; spacious gardens; extensive well wooded demesne. See Court-house, Gaol, Barracks, and Charter School. Town irregular, yet neat; many of the houses displaying considerable taste and elegance. About a mile westward, on the summit of a hill, seen for several miles along the great north road, and commanding a most extensive prospect of the Mourne and Carlingford mountains, are some remains of a fine old Danish station and rath; a little below which, the tourist will notice the ruins of an old Ch. or Chapel, enveloped in ivy, and pointing out a Catholic cemetery of great sanctity. On the side of the hill stands the Castle of Castletown, an ancient edifice with towers and battlements, but partly repaired and habitable, forming the offices to a more modern mansion close to it. This castle was taken and sacked in the 14th century by Edward Bruce; and there are some apparent vestiges of those times in earth-works on the side of the hill, towards the river. The village itself is small, and contains nothing else deserving of notice. Balrichan is a peninsula, about 2 m. from Dundalk, containing several curious antiquities; some Druidical remains; ruins of a Castle with subterraneous cave; the Giant's load, a massy stone 12 feet long, 6 feet square, resting on three uprights; Mount Albani, an earthen camp, with a tumulus: also Castle Rath, and the tower of Ballug. At Bellurgan, see the park. Piedmont, a beautiful residence of Lord Clermont; ruins of old Ch. and several Castles. Carrickasticken has several raths, or sepulchral mounts. Fanghar, 2 m. N., has curious artificial mount, composed of stones and tarras, 60 feet high. At Killincool, on the Atherdee road, a fine old Castle, with numerous vaults and secret passages. Lurgan Green, a smart agreeable village; and a few miles N., see the Jonesborough mountains, in all their native wildness. Near them is Ravensdale, romantically seated on the rise of a mountain, with fine hanging-woods on every side. On the summit of a rocky hill, 4 m. S., curious rath at Miltown; and, close to the frontier of the English Pale,--in appearance and situation very much resembling Bolsover Castle in England,--stand the