The Mabinogion — Kilhwch and Olwen (1877)
“ Through the whole world is it known that this is the castle of Yspaddaden Penkawr." "And who art thou?" "I am called Custennin the son of Dyfnedig, and my brother Yspaddaden Penkawr oppressed me because of my possessions. And ye also, who are ye?" "We are an embassy from Arthur, come to seek Olwen the daughter of Yspaddaden Penkawr." "Oh men! the mercy of Heaven be upon you, do not that for all the world. None who ever came hither on this quest has returned alive." And the herdsman rose up. And as he arose, Kilhwch gave unto him a ring of gold. ”
