Behind the House are to be seen two vast _Cromlechs_, the upper stone of one is twelve feet seven inches long, twelve broad, and four thick, supported by five tell ones; the other is but barely separated from the first, is almost a square of five feet and a half, and supported by four stones. The number of supporters to _Cromlechs_ are supposed to be merely accidental, and to depend on the size and form of the incumbent stone. Dr. Borlase, in his History of _Cornwall_, has shewn the improbability of these stones ever being designed or used as Altars; the figure proves the impossibility of making fires, or performing sacrifices on their sloping summits, and almost all which I have seen (observes Mr. Pennant) have an inclination. It is reasonable to suppose them to have been sepulchral monuments, (probably of their Arch Druids) and that the body might be lodged in the space beneath, and near the monument divine honours might be paid, or sacrifices performed to the manes of the dead.—This species of monument is to be found in most parts of Europe, in Scandinavia, in Holland and in France; in the last, the _Pierre Levee_, near Poitiers, is a stupendous specimen; they extend even farther South, for Mr. Armstrong gives a drawing of one of this nature in Minorca. They vary in form, in many the space between the supporters is closed up with stones of greater or lesser size, and thus formed a sufficient security to the remains of the deceased therein deposited. Probably all or most of those which we see in our Island, might originally have been thus closed up, and the stones since taken away, and applied to other uses; others are again quite bedded in the _Carnedd_, as is the case with that at Llanfaelog, in this Island. Not far from the _Cromlech_ is a large _Carnedd_, part of which has been removed; within was discovered a Cell, about seven feet long and three wide, covered at the top with two flat stones, and lined on the sides with others. On the top of the stones were two semicircular holes, of size sufficient to take in the human neck; it is conjectured that above might have been another, so that both together might perform the office of a stocks.—It is indeed conjecture, yet not an improbable one, that in this place were confined, the wretches destined for sacrifice, as it is well known that they performed those execrable rites, and often upon captives who had suffered long imprisonment, perhaps in Cells similar to this, and the common Welsh proverb “_Bwrw caeth i Gythraul_,” to offer a captive to the Devil, seems to confirm this opinion. After the tourist has examined the interior of Plasnewydd, which he may easily do if he be so disposed, he is recommended to pay a visit to Mr. Saunderson’s beautiful Cottage, the _Lodge_, about a quarter of a mile to the East of this Princely mansion, where his curiosity will no doubt be amply gratified, as that gentleman has displayed peculiar taste and judgment in the embellishment and