In this parish stands Castell-an-Dinas. It consists of about six acres of ground, within three circles or intrenchments, upon the top of a pyramidal hill, composed or built of turf and unwrought stones, after the British manner, without lime or mortar, comparatively a hedge; each of those circles or ramparts rising about eight foot above each other towards the centre of the castle, consisting of about an acre and a half of land, in the midst whereof appear the ruins of some old dilapidated houses; near which is a flat vallum, pit, or tank, wherein rain or cloud-water, that falls down from the middle regions, abides more or less in quantity as it falls one half of the year; which, I suppose, heretofore supplied the soldiers’ occasions, as no fountain, spring, or river water is within a thousand paces thereof. There were two gates or portals leading to this fort, the one on the east, the other on the west side thereof, which, on a stony causeway now covered with grass, conducts you up and down the hill towards Tre-kyning, that is to say the king’s, prince, or ruler’s town. Moreover, contiguous with this castle are tenements of land or fields, named Tre-saddarne, that is to say god Saturn’s town, a place where the god Saturn was worshipped by the soldiers, who probably had their temple or chapel here before Christianity. Near this castle, by the highway, stands the Coyt, a stony tumulus so called, of which sort there are many in Wales and Wiltshire, as is mentioned in the Additions to Camden’s Britannia in those places, commonly called the Devil’s Coyts. It consists of four long stones of great bigness, perpendicularly pitched in the earth contiguous with each other, leaving only a small vacancy downwards, but meeting together at the top; over all which is laid a flat stone of prodigious bulk and magnitude, bending towards the east in way of adoration, (as Mr. Lhuyd concludes of all those Coyts elsewhere,) as the person therein under it interred did, when in the land of the living; but how, or by what art this prodigious flat stone should be placed on the top of the others, amazeth the wisest mathematicians, engineers, or architects, to tell or conjecture. Colt, in Belgic-British, is a cave, vault, or cott-house, of which coyt might possibly be a corruption. Not far from this coyt, at the edge of the Goss-moor, there is a large stone, wherein is deeply imprinted a mark, as if it were the impress of four horseshoes, and to this day called King Arthur’s Stone; yea, tradition tells us they were made by King Arthur’s horse’s feet, when he resided at Castle Denis, and hunted in the Goss Moor. But this stone is now overturned by some seekers for money.