I used to have a lot of images on imageshack but for some reason, they have all gone. I used to have a laptop with all my work on it but spilled a cup of coffee on it and fried everything...many years of work and links and what-not lost.
So...the Fifth Hour of the Duat
The Fourth Hour leads to the fifth...so imagine looking into the pyramid from the east side with its 3 chambers and passages: the lowest chamber has its representation of a sarcophagus staying there, while the other two rise to their positions...3 parts of the whole.
This is called "Entering Rostau".
""The one belonging to Rosetau.
Secret paths of Rosetau. The divine gate
He cannot pass them, but it is (only) his voice which they hear.
Path entered by the corpse of Sokar-upon-his-sand.
Secret image which can neither be seen nor beheld.
Secret path entered by Anubis to conceal the corpse of Osiris.
Secret path of the edge of the Imhet."
In OMR, the overlay of the cosmos to the pyramid from the west side shows the bottom part of the constellation Sek looking quite like the passages of the forth hour, riding the ascending passage to the gallery.