_Brennanstown (Glen Druid) Cromlech._--In a picturesque valley, close to Cabinteely, County Dublin, stands a very perfect cromlech. This monument may be reached in a short walk from the Carrickmines railway station. The site is a little over one mile and a-half from the sea-coast. The covering stone is of an irregular form, but the under portion, which forms the top of the chamber, is quite flat and horizontal. The following are its dimensions:--length and breadth, 15½ feet; thickness, 3 to 5 feet. It is not easy to calculate the weight of this mass, on account of the irregularity of form which the block presents; but it is estimated at 36 tons. It rests, as Mr. Borlase points out, on two _antæ_, as well as on the larger stones, and so forms an ante-chamber 5 feet wide at the entrance. A number of detached stones lying about this very perfect example would indicate that it was originally accompanied by a circle of standing stones. [Illustration: Brennanstown Cromlech.] * * * * * _Glensouthwell Cromlech._--Of this ‘Druid’s or Brehon’s Chair,’ already referred to (page 42), Beranger wrote as follows:--‘This piece of antiquity, the only one yet discovered, is situated at the foot of the Three-Rock Mountain. It is supposed to be the seat of judgment of the Arch-Druid, from whence he delivered his oracles. It has the form of an easy-chair wanting the seat, and is composed of three rough, unhewn stones, about 7 feet high, all clear above ground. How deep they are in the earth remains unknown. Close to it is a sepulchral monument or cromlech, supposed to be the tomb of the Arch-Druid. It is 15 feet in girth, and stands on three supporters, about 2 feet high, and is planted round with trees. The top stone is 8½ feet long.’ The so-called ‘chair’ still remains, and the above account fairly describes it. The three stones, standing north, west, and east, are, however, 9¼ feet, 8¾ feet, and 8 feet high, respectively. It never was a ‘chair.’ It is evidently a rather small but high cromlech that has lost its covering stone. The ‘cromlech’ noticed by Beranger was probably the block destroyed by blasting in 1876. * * * * * _Glencullen Cromlech._--This monument is situated on the eastern side of Glencullen, half a mile north-west of Glencullen House, near Kilternan, in a very wild district, extending to the west of the Three-Rock Mountain, and at a distance of some three miles, in a direct line, from the sea. It is described by O’Neill as having ‘a roof rock 10 feet long, 8 feet broad, and 4 feet thick, extreme measures.... The longest direction of the roof rock is W.S.W., or nearly east and west. The chamber is greatly damaged.’[34] * * * * *