 Its setting, Pal-ul-don, is one of the more thoroughly realized "lost civilizations" in Burroughs' Tarzan stories.The novel contains a map of the place as well as a glossary of its inhabitants' language.Two months have passed since the conclusion of the previous novel, "Tarzan the Untamed", in which Tarzan spent many months wandering about Africa wreaking vengeance upon those who he believed brutally murdered Jane.