Schultz was a noted author, explorer, Glacier National Park guide, fur trader and historian of the Blackfoot Indians. While operating a fur trading post at Carroll, Montana and living amongst the Pikuni tribe during the period 1880-82, he was given the name "Apikuni" by the Pikuni chief, Running Crane. Schultz is most noted for his prolific stories about Blackfoot life and his contributions to the naming of prominent features in Glacier National Park. Mr. Schultz is one of the last of the old-time frontiersmen, who was with a tribe of Blackfeet for years; and his books, into which he puts his rich store of memories of bygone days, have been called “the best of their kind ever written. The dreadful river cave tells the story of a young, brave, black Elk, and his exciting adventures centering about a mysterious cave behind a water-fall. This book originally published by Houghton Mifflin in 1920 has been reformatted for the Kindle and may contain an occasional defect from the original publication or from the reformatting.