To Phorcys Ceto bore the fair-cheeked Graiae...
then the Gorgons, who dwell beyond glorious Okeanos,
at earth's end, toward night, by the clear-voiced Hesperides,
Stheno, Euryale, and ill-fated Medusa
who was mortal; the other two were ageless and immortal.
- Hesiod, a poet