Only one tribe of American Indians is known ever to have successfully revolted against the empire of Spain and to have thwarted all subsequent attempts by the Spaniards to reconquer them: the Jivaro (hee'-va-ro), the untsuri suarii of eastern Ecuador. From 1599 onward they remained unconquered in their forest fastness east of the Andes, despite the fact that they were known to occupy one of the richest placer gold deposit regions in all of South America...