Orpheus (north east Danube valley) and even describes him wandering into Hyperborea and Tanais (ancient Greek city in the Don river delta) due to his grief. The story of Eurydice may actually be a late addition to the Orpheus myths. In particular, the name "Eurudike" ("she whose justice extends widely") recalls cult-titles attached to Persephone. According to the theories of poet Robert Graves, the myth may have been derived from another Orpheus legend, in which he travels to Tartarus and charms the goddess Hecate. The myth theme of not looking back, an essential precaution in Jason's raising of chthonic Brimo Hekate
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