"No doubt you have heard the age-old legend of the Mother Vein of Gold, which appears and vanishes, now and again, in this corner of the world. Superstition regarding this great original vein of gold is found wherever men seek the precious metal. The feverish Spaniards called this phantom lode the Madre d'Oro, or "Mother of Gold." Now it is located in Mexico, now in India or Peru, California or Australia. Tradition says that Montezuma got his gold from this great vein, which lay in a secret valley whose where-abouts was jealously guarded by three priests of the war tribe, sole possessors of the knowledge. Any intruder who by chance or design looked down into this valley was smitten absolutely blind. Tradition among the successors of the Aztecs says that when Montezuma passed, the Madre d'Oro sank back again into the earth, and has been seen no more. Men still follow the phantom vein. Those who see it, even in their dreams, still are smitten blind." -Preface