LEIGHLIN BRIDGE,--is a small village about 8 m. S. of Carlow, with remains of an ancient Castle and some monastic ruins, which have also been castellated. The view from the bridge with the Black Castle at one end is very fine, though the bridge itself is more venerable than picturesque; built in 1320, by a liberal canon of Kildare. The course of the river Barrow presents views of great fertility and beauty, though certainly not so romantic as many smaller streams. See Bally Ellen Castle in ruins about 8 m. S.; also Ballylaghan Castle, which presents a gateway between two lofty circular towers, in the style of Tunbridge Castle. Though the castle stands low, yet the view to the westward is very fine; and, as its walls are in pretty good preservation, it affords an amusing object of research to the antiquary, who may ascend some ruinous staircases into several of the apartments, and gratify his fancy by the recollection of past times. Ballymorn Castle, 5 m. distant, is an extensive ruin standing in a deep vale surrounded by lofty mountains. It is of the middle ages, but has Gothic windows in the interior, and has the peculiarity of its outer walls being perforated by a gallery from whence the garrison could discharge their missiles through numerous loop-holes. Only one large tower remains. Clonmore is an extensive and pleasing ruin, presenting a good idea of the arrangements, half military half domestic, of the earlier times, though unroofed and much dilapidated, but rendered venerable by the covering of thick ivy that mantles its walls, affording shelter to the birds of night. Fenough, 9 m. S.E., has an old Castle near the church, once a residence of the kings of Leinster. Garryhaddon, 2 m. N.E., a deserted mansion of the Ormond family, has an appearance of ancient magnificence, with an extensive park and gardens. Whilst the picturesque tourist is rambling through the Carlow mountains, he will not omit visiting a deep recess in the Slieumargah, where stand the remains of the Abbey of Old Leighlin, recorded in the earliest monastic legends, but now exhibiting no remnants of architecture anterior to the 12th century, when it was re-edified, after destruction by fire about the time of the Norman conquest. Here was once a celebrated episcopal city; but the ruins of the Abbey, of which the cathedral is still kept in decent repair as a parish Ch., alone remain. The Abbey, though not very extensive, is deserving of notice on account of its pinnacled spire and the rich tracery of its Gothic windows, being about the time of Hen. II. or at least re-edified after a destructive fire; but suffered to sink into ruin since the union of the Sees of Leighlin and Ferns. On the west side of the Ch. under some trees, see the once celebrated well of St. Laferian, now nearly filled up, and near it a rude stone cross. The antiquary will also find subjects of research in some old termini