In the neighbourhood of the lake north-eastward, and near the head of the Lleveny brook, which empties itself into the pool, I find described the ruins of BLAEN-LLEVENY CASTLE. It was fortified by Peter FitzHerbert, descended of Bernard de Newmarch, lord of Brecon, according to the opinion of some antiquaries, upon the site of the Roman Loventium. The road soon descends to the fine vale of Brecon, grandly accompanied by a semicircular range of mountains; where, proudly rising in superior majesty, the Van rears its furrowed and bipartite summit high above the clouds. Advancing, cultivation takes a more extensive sweep, and picturesque disposition becomes frequent. The Usk flowing round the foot of the Bwlch, cloathed with the extensive plantations of Buckland-house, salutes the beholder with renewed attractions; and farther up the vale laves the charming woody eminence of Peterstone in its sinuous career. On the left of the road, about five miles from Brecon, is a stone pillar, six feet in height, and nearly cylindrical; on which is an inscription that Camden read, N--- FILIUS VICTORINI, but which is now almost obliterated. He supposes it a monument of later ages than the Romans, although inscribed with their characters, and wearing the general appearance of a Roman _cippus_. In the parish of Llahn Hamwalch, standing on the summit of a hill near the church, (which is to the left of the road a little beyond the former monument) I find described St. Iltut’s hermitage, composed of four large flat stones; three of which, standing upright, are surmounted by the fourth, so as to form a sort of hut, eight feet long, four wide, and nearly the same in height. This kind of monument is called a Kist-vaen, a variety of the Cromlech order, and supposed to have been applied to the same purposes. BRECON is delightfully situated upon a gentle swell above the Usk, overlooking a fertile highly-cultivated valley enlivened with numerous seats, and enriched with several sylvan knolls. On one side of the town, beneath the majestic hanging groves of the priory, the impetuous Hondy loudly murmurs, and unites with the Usk a small distance beyond its handsome bridge. Though the town boasts many capital residences, yet, encumbered by a number of mean hovels even in its principal situations, and deficient in regulations of cleanliness, it fails to create any idea of importance. Its once magnificent castle is now curtailed to a very insignificant ruin; and that little is so choaked up with miserable habitations, as to exhibit no token of antique grandeur: some broken walls and a solitary tower compose its remains.