46:5.11

These seven circles of the Sons are concentric and successively elevated so that each of the outer and larger circles overlooks the inner and smaller ones, each being surrounded by a public promenade wall. These walls are constructed of crystal gems of gleaming brightness and are so elevated as to overlook all of their respective residential circles. The many gates—from fifty to one hundred and fifty thousand—which penetrate each of these walls consist of single pearly crystals.