Prester John's Magic Stones:
Through the agency of special viewing stones, Prester John gained instant knowledge of distant events. Empowered to project peace and benevolence to distant warring lands, he watched and interceded over whole regions through these magickal means. He was able to project help to those lands through rays, which came from his magickal stones. (Ref.: http://johnbedini.net/john34/eternal_lanterns.htm ) (JHR: This reminds me of the treasure viewing stone that Joseph Smith is reported to have used in his early days near Palmyra, NY;)