 Under the pretence that he was going to marry Hippodamia, he ordered every man in Seriphos to supply him with suitable gifts.His friends were to provide horses but Perseus failed to bring any, so Polydectes announced that he wanted nothing more than the head of the Gorgon Medusa, being that Perseus had previously said he was up to a task so harsh as fetching a Gorgon's head.Perseus agreed and Polydectes told him that he could not return to the island without it.