The Greek Hermes found his analogue in Egypt as the ancient Wisdom god Thoth, as Taaut of the Phoenicians and in Rome as the god Mercury (all linked with a magic rod with twin snakes).

The mythical origin of his magic twin serpent caduceus is described in the story of Tiresias. Poulenc, in "Les Mamelles de Tiresias" (The Breasts of Tiresias) tells how Tiresias--the seer who was so unhelpful to Oepidus and Family- found two snakes copulating, and to separate them stuck his staff between them. Immediately he was turned into a woman, and remained so for seven years, until he was able to repeat his action, and change back to male. The transformative power in this story, strong enough to completely reverse even physical polarities of male and female, comes from the union of the two serpents, passed on by the wand. Tiresias' staff, complete with serpents, was later passed on to Hermes...