4The story of the expulsion of Elcmar from Brú na Bóinne by the "druid-enchantments" of Aenhus is a Celtic myth which in its present form dates from about the time of Christ.
Herity, Michael. Irish Passage Graves: Neolithic Tomb-builders in Ireland and Britain, 2500 B.C. New York: Barnes & Noble, 1975. 1.