We can distinguish certain groups of chapters, an Osirian section on the kingdom of Osiris and the service of it, a theological section, a set of incantations, formulae for the restoration of the heart, for the protection of the soul from spirits and serpents in the hours of night, charms to escape from perils ordained by the gods, an account of the paradise of Osiris, a different version of the kingdom and judgment of Osiris, a Heliopolitan doctrine about the _ba_, and its powers of transformation entirely apart from all that is stated elsewhere, the account of the reunion of soul and body, magic formulae for entering the Osirian kingdom, another account of the judgment of Osiris, charms for the preservation of the mummy and for making efficacious amulets, together with various portions of popular beliefs. In contrast to the mainly Osirian character above described, we see the solar religion dominant in the Book of Am Duat, or that which {79} is in the underworld. This describes the successive hours of the night, each hour fenced off with gates which are guarded by monsters. At each gate the right spells must be uttered to subdue the evil powers, and so pass through with the sun. The older beliefs in Seker, the god of the silent land, and Osiris, the king of the blessed world, are fitted in to the newer system by allotting some hours to these other realms as a part of the solar journey. A variant of this work is the _Book of Gates_, describing the gates of the hours, but omitting Seker and making Osiris more important. These books represent the fashionable doctrines of the kings in the Ramesside times, and are mainly known from the royal tombs on which they are inscribed.