TRECASTLE, a hamlet, in that part of the parish of LLANDILO-VAWR which is in the hundred of ISCENNEN; county of
CARMARTHEN, SOUTH WALES, 4 miles (S. E.) from Llandilo-Vawr; containing 378 inhabitants. In this hamlet, about two miles
and a half to the east of the turnpike-road from Llandilo-Vawr to Swansea, stand the picturesque and romantic, remains of
CarreF Clennen Castle, on a perpendicular isolated rock, rising nearly three hundred feet above the river Cennen, which
flows at its base. The whole summit is covered by the build. ings, which occupy about an acre and can only be approached
on one side, and with some difficulty: The principal. entrance is at the north-east angle, where is an octagonal tower,
protected by two square towers OR thersame side, and at the nor ,,west angle is a round tower.  In the .interior is a
quadrilateral court, measuring .thirty yards by twenty-five. The east end still exhibits the ruins of several apartments,
while -the south side seems to have been occupied by the offices. But the most singular ' portion is the well, which is
supposed to have supplied the garrison with water.; the entrance to it is under sparrow arched. way at the  northern edge
of the cliff, which leads to a gradually descending passage of . unequal height and breadth, lighted at intervals by.
apertures out outward .through the rock; at the distance of about fifty yawls is the well, aonsistingof a basin
excavated in. the rock, into which the water drip* but it is not capable of containing mere than a few gallons. . The
situation of the castle is peculiarly interesting; and though surrounded by lofty hills, the views from it,specially on.
the right, where the Vale of the Towy presents itself,: in front that of Llangendeirn' and on the left the Vale of
Llandebie, with a part of that of Loughor, are rich and varied. The castle is said to have been erected by Urien Rheged,
lord of Isoennen, a knight of King Arthur's round table; the chief .circumstance in its authentic history is its capture
from the English by Rhys Vychan, whose mother .had delivered it to them out a dislike to him. For want of a little .
annual care this extremely curious fortress is rapidly falling. into a shapeless ruin, and irretrievable decay. Roman
coins, among which have been some of the Emperor Domitian, are continually found in the soil at the foot of the rock on
which the castle stands; and an ancient British  colt has been discovered in the immediate vicinity.