848. Now and again, the vision of the city even fades away. Before this happens there commonly appears something like a large back stretched out in the room, or a voluminous form like the human back, which raises itself, stretched out, even to the roof. The roof then appears, with beams joined together in the form of a triangle, as roofs usually are in cities of the world, and up to it that back or voluminous form raises and stretches itself; and then it appears as if there is an opening at one side, of a sky blue color, yet in such a way that the beams of the roof are still visible. Then the illusion of a city passes away.