40.—Cromlech at Plas Newydd, Anglesey details

“The Isle of Anglesey, anciently called Mona, was the great stronghold of Druidism, whilst the Romans had still a disturbed possession of the country, Tacitus, describing an attack upon Mona, says that the British Druids “held it right to smear their altars with the blood of their captives, and to consult the will of the gods by the quivering of human flesh.” At Plas Newydd, in the Isle of Anglesey, are two cromlechs (Fig. 40); and it is believed that these remains confirm the account of Tacitus, and that they were the altars upon which the victims were sacrificed.” (p. 11.)