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
Hades of the Underworld, which was when Heracles shot him with an arrow as Hades was attempting to defend the city of Plyos. After he was shot, however, he traveled to Olympus to heal. Besides Heracles, the only other living people who ventured to the Underworld were also heroes: Odysseus, Aeneas (accompanied by the Sibyl), Orpheus, who Hades showed uncharacteristic mercy towards at Persephone's persuasion, who was moved by Orpheus' music, Theseus with Pirithous, and, in a late romance, Psyche. None of them were pleased with what they witnessed in the realm of the dead. In particular, the Greek war hero