An explorer and adventurer in the old tradition, Colonel Clark has spent most of his adult life in far flung exploration on five continents. This is the story of his search (and finding) of the legendary Seven Cities of Cibola in the jungles of the Gran Pajonal. With no official backing, with almost no reserve funds, he accomplished the impossible. He penetrated the jungles and navigated the tributary system of the Amazon; he learned to know the natives, lived off the jungles and brought back important findings in species and over sixty medications which may prove more significant than the success of his quest for the ruins. He mapped the fabulous El Dorado territory, its sources of gold and oil in the Amazon region. Unique- informal- exciting- miraculous. Thoroughly authenticated, it yet reads like fabulous legend.