This Cromlech is on a rocky promontory, south-west of Perelle Bay, in the beautiful parish of St. Saviour’s. The derivation of its name, “Castiau-Roc”--as it is properly--is from the “_Castelh Carreg_” “Castle Rock” of the Gauls. As one approaches it one is struck by the vestiges of Cromlechs with their circles, and bits of “Longues Roques.” In olden days, before so much of the surroundings were quarried away, this must have been only one among many other conspicuous objects down there. The names “La Roque Fendue,” “La Roque au Tonnerre,” “Plateau ès Roques,” “La Pièche des Grandes Roques du Castiau-Roc,” which are mentioned in various “Livres de Perquages,” are all that remain of these ancient remains. Much to be regretted is the disappearance of the “Portes du Castiau-Roc,” which might perhaps have helped us to define with some exactitude where this problematic castle once stood, and perhaps identify it with the fortified mounts of the Celts and Irish. It is noted in our island annals for being the midnight haunt of our witches and wizards. In the trials for witchcraft held under Amias de Carteret in the beginning of the seventeenth century, it was there that his trembling victims confessed to having come and danced on Friday nights, in honour of the gigantic cat or goat with black fur, called “Baal-Bérith” or “Barberi,” nowadays “Lucifer.” Near this rock was the “Chapel of the Holy Virgin” on Lihou Island, now in ruins, and it is said that the witches even defied the influence of “the Star of the Sea,” shouting in chorus while they danced, _“Qué, hou, hou,_ _Marie Lihou.”_ This monument is like the “Tables en Trépied,” and analogous to the “Lhêch y Drybedh” of the county of Pembroke, in Wales. There were altars in this form and of this description in almost every canton of the island. One, near the Chapel of St. George, is quite destroyed, and there are now no traces left of another between the Haye-du-Puits, and the Villocq. In the environs of the Castiau-Roc bones and arms have been found.[57] “LE CREUX ES FAÏES.” This Cromlech is situated on the Houmet Nicolle at the point of L’Erée, (so called from the branch of the sea, _Eiré_, which separates it from the islet of Notre Dame de Lihou). This island, which once had upon it a chapel and a priory dedicated to “Notre Dame de la Roche,” was always considered so sacred a spot that even to-day the fishermen salute it in passing. This Creux is a Dolmen of the nature of those which are called in France “allées couvertes,” perfectly well preserved, and partly covered with earth. The researches which have been made in these ancient monuments of antiquity prove them to have been places of sepulchre. This one consists of a chamber seven feet high, and covered with a roof of two blocks of granite, each fifteen feet long and ten broad. The entrance faces east, and is only two feet eight inches wide, but soon enlarges, and the interior is almost uniformly eleven feet wide.