Arnobius

“ In Timotheus, who was no mean mythologist, and also in others equally well informed, the birth of the Great Mother of the gods, and the origin of her rites, are thus detailed, being derived—as he himself writes and suggests—from learned books of antiquities, and from his acquaintance with the most secret mysteries:—Within the confines of Phrygia, he says, there is a rock of unheard-of wildness in every respect, the name of which is Agdus, so named by the natives of that district. ”