chunk: Miraculously, Tarzan manages to swim to shore, and finds himself in the coastal jungle where he was brought up by the apes. He soon rescues and befriends a native warrior, Busuli of the Waziri, and is adopted into the Waziri tribe. After defeating a raid on their village by ivory raiders, Tarzan becomes their chief.
  The Waziri know of a lost city deep in the jungle, from which they have obtained their golden ornaments. Tarzan has them take him there, but is captured by its inhabitants, a race of ape-like men, and is condemned to be sacrificed to their sun god. To Tarzan's surprise, the priestess to perform the sacrifice is a beautiful woman who speaks the ape language he learned as a child. She tells him she is La, high priestess of the lost city of Opar. When the sacrificial ceremony is fortuitously interrupted, she hides Tarzan and promises to lead him to freedom. But the ape man escapes on his own, locates a treasure chamber, and manages to rejoin the Waziri.