The signature alone may be read at -5. Lunomancy is divination by the shadows created by moonlight on the individual's face. A reading takes 30 minutes. Pedomancy is divination by examining the footprint of the person to be studied. Footprints not in clay are read at -5.
Geomancy is divination by examining the earth.
Divination is by examining the reaction of the soil to symbols traced within it. Aeromancy is divination by air. It is performed in solitude and, like Geomancy, requires that the diviner not be indoors, although he need not be on the ground. In addition, note that the hard vacuum of space is no place to divine. Air, obviously, must be present.