Erichthonius isn’t the only thing that Hephaestus caused. Autochthonous, Automaton. Same difference.
‘For the popularity of Athena among the artisans at this time some verses of Sophocles are characteristic: “Come out in the street you, all the people of the handicraftsmen, who venerate the daughter of Zeus, Ergane, with sacrificial baskets and beside the heavy anvil, beaten with hammers.” Evidently, Sophocles hints at some popular festival of Athena celebrated by the artisans in the streets of the town. There was such a festival, the Chalkeia. The word signifies the festival of the coppersmiths. It belonged to Athena, but at a later date another god of the Athenian artisans, Hephaistos, was associated with Athena. These two even had a common temple. In Homer, Hephaistos is the divine goldsmith. He probably came from the island of Lemnos or, perhaps, from Asia Minor. In origin he was a daemon of fire coming up from the earth. Gas which takes fire and burns is considered by many people to be divine. Later a volcano was considered to be his smithy. He had almost no cults in Greece except in Athens. No doubt the Athenian artisans took up his cult and place him at the side of Athena. He seemed, perhaps, to be nearer to them than the great city goddess. But in the early age it was she who was the protectress of the Athenian craftsmen.’ – Greek Folk Religion, Martin P. Nilsson.
[“BLA and GB Gabbler” (really just a pen name – singular) are the Editor and Narrator behind THE AUTOMATION, vol. 1 of the Circo del Herrero series. They are on facebook, twitter, tumblr, goodreads, and Vulcan’s shit list.]