off using a tuft of wool, which she tossed into the dust, impregnating Gaia and causing her to give birth to Erichthonius. Athena adopted Erichthonius as her son and raised him. The Roman mythographer Hyginus records a similar story in which Hephaestus demanded Zeus to let him marry Athena since he was the one who had smashed open Zeus's skull, allowing Athena to be born. Zeus agreed to this and Hephaestus and Athena were married, but, when Hephaestus was about to consummate the union, Athena vanished from the bridal bed, causing him to ejaculate on the floor, thus impregnating Gaia with Erichthonius. The geographer Pausanias records that Athena placed the infant Erichthonius into a small chest (cista), which she entrusted to the care of the three daughters of Cecrops: Herse, Pandrosos, and Aglauros of Athens. She warned the three sisters not to open the chest, but did not explain to them why or what was in it. Aglauros, and possibly one of the other sisters, opened the chest. Differing reports say that they either found that the child itself was a serpent, that it was guarded by a serpent, that it was guarded by two serpents, or that it had the legs of a serpent. In Pausanias's story, the two sisters were driven mad by the sight of the chest's contents and hurled themselves off the Acropolis, dying instantly, but an Attic vase painting shows them being chased by the serpent off the edge of the cliff instead. Erichthonius was one of the most important founding heroes of Athens and the legend of the daughters of Cecrops was a cult myth linked to the rituals of the Arrhephoria festival. Pausanias records that, during the Arrhephoria, two young girls known as the Arrhephoroi, who lived near the temple of Athena Polias, would be given hidden objects by the priestess of Athena, which they would carry on their heads down a natural underground passage. They would leave the objects they had been given at the bottom of the passage and take another set of hidden objects, which they would carry on their heads back up to the temple. The ritual was performed in the dead of night and no one, not even the priestess, knew what the objects were. The serpent in the story may be the same one depicted coiled at Athena's feet in Pheidias's famous statue of the Athena Parthenos