It was Ptah who, in company with Khnemu, carried out the commands of Thoth concerning the creation of the universe. To Khnemu was given the fashioning of animals, while Ptah was employed in making the heavens and the earth. The great metal plate which was supposed to form the floor of heaven and the roof of the sky was made by Ptah, who also framed the supports which upheld it. We find him constantly associated with other gods--that is, he takes on the attributes or characteristics of other deities for certain fixed purposes. For example, as architect of the universe he partakes of the nature of Thoth, and as the god who beat out the metal floor of heaven he resembles Shu. Ptah is usually represented as a bearded man having a bald head, and dressed in habiliments which fit as closely as a shroud. From the back of his neck hangs a Menat, the symbol of happiness, and along with the usual insignia of royalty and godhead he holds the symbol of stability. As Ptah-Seker he represents the union of the creative power with that of chaos or darkness:[4] Ptah-Seker is, indeed, a form of Osiris in his guise of the Night-sun, or dead Sun-god. Seker is figured as a hawk-headed man in the form of a mummy, his body resembling that of Ptah. Originally Seker represented darkness alone, but in later times came to be identified with the Night-sun. Seker is, indeed, confounded in places with Sept, and even with Geb. He appears to have ruled that portion of the underworld where dwelt the souls of the inhabitants of Memphis and its neighbourhood. The Seker-boat