For 25 years he applied his skills both as an artist and as a consultant in energy technology. He nourished hobbies in the hermetic disciplines and spiritual/psychic meditation practices while developing a stronger grasp of physical science. Mandeville found it easy to ignore conventional thinking and take up the phenomenon of Edgar Cayce and his World Epic stories. He undertook the challenge to prove or disprove them because he felt that most writers and sources in the secular academic fields of archeology, history, egyptology, and geology are ignoring truly interesting hard data from highly skilled "hard technicians" who were generating real facts pointing to different realities.