Sir Orfeo as being a parallel dimension to the everyday world rather than the Land of the Dead as in the Greek myth of Orpheus and Eurydice. The ability to move between one world and the other distinguishes the tale as told in its various British versions such as "Sir Orfeo" and the Shetland ballad "King Orfeo" where the captors are envisaged as inhabitants of a parallel fairy domain rather than as the infernal region of the Dead ruled over by Hades as in the Greek myth. Katharine Briggs sees the tale as related in British folk narratives as being equally influenced
Greek mythology and she burst forth from his head—fully-grown and dressed for war. The earliest Greek thought about poetry considered the theogonies to be the prototypical poetic genre—the prototypical "mythos"—and imputed almost magical powers to it. Orpheus, the archetypal poet, also was the archetypal singer of theogonies, which he uses to calm seas and storms in Apollonius' "Argonautica", and to move the stony hearts of the underworld gods in his descent to Hades. When Hermes invents the lyre in the "Homeric Hymn to Hermes", the first thing he does is sing about the birth of the gods. Hesiod's "Theogony" is not only