The Treasure of Atlantis

A revelation of Ronald Murdock, an orchid hunter, persuades Stanley Morse to take an expedition in the mountain jungles of South America where fearless explorers find the descendants of those who fled the destruction of ancient Atlantis.
J. Allan Dunn (1872–1941) was one of the high-producing writers of the American pulp fiction. He first made a name for himself in pulp magazine Adventure. He was a specialist in South Sea stories, and pirate tales. His main genres were adventure and western, but he also wrote a number of detective stories.