Banquet of Dun na n-Gedh
Spiritualism, as appears by the Banquet of Dun na n-Gedh, was used thus:—"This is the way it is to be done. The poet chews a piece of the flesh of a red pig, or of a dog or cat, and brings it afterwards on a flag behind the door, and chants an incantation upon it, and offers it to idol gods; and his idol gods are brought to him, but he finds them not on the morrow. And he pronounces incantations on his two palms; and his idol gods are also brought to him, in order that his sleep may not be interrupted. And he lays his two palms on his two cheeks, and thus falls asleep. And he is watched in order that no one may disturb or interrupt him, until everything about which he is engaged is revealed to him, which may be a minute, or two, or three, or as long as the ceremony requires—one palm over the other across his cheeks."
The author of The Golden Bough, J. G. Frazer, judiciously reminds us that "the superstitious beliefs and practices, which have been handed down by word of mouth, are generally of a far more archaic type than the religions depicted in the most ancient literature of the Aryan race." A careful reading of the chapter on the "Superstitions of the Irish" would be convincing on that point.