sentences:  Varro also describes these twin pillars as Heaven and Earth, denying the vulgar error that they are Castor and Pollux.At Thebes in Boeotia there are more varied finds than on Lemnos; they include many little bronze votive bulls and which carry on into Roman times, when the traveller Pausanias, always alert to the history of cults, learned that it was Demeter "Kabeiriia" who instigated the initiation cult there in the name of Prometheus and his son Aitnaios.Walter Burkert (1985) writes, "This points to guilds of smiths analogous to the Lemnian Hephaistos."