The Wisconsin River, Paul Seifert, Bogus Bluff, Richland City, and the ancient cultures that once thrived there, all have something in common: mystery. For 10,000 years humans have occupied the delta at the confluence of the Wisconsin and the Pine Rivers; inhabitants of distinctly different eras have left behind clues to their existence. The most recent-the Native American Indians-have given us a bounty of lore and legend. A mysterious letter in the hands of German emigrant Paul Seifert in the Nineteenth Century helps set the scene for another one of the river valley's most puzzling secrets. It has been the foundation of a 35-year-long search for a cave believed to be an Indian burial site containing vast treasures of ancient times. Treasure hunter/Researcher Ron Nagel has teamed with authors Dan Bomkamp and J. L. Fredrick to tell the story as it has developed through the ages. Together they unravel some of the mystery surrounding this enchanted valley.