chunk: Carter and Tars Tarkas rescue Thuvia, a slave girl, and attempt to escape, capitalizing on the confusion caused by an attack by the Black Pirates of Barsoom upon the Therns. During the attack, Tars Tarkas and Thuvia hijack a Black Pirate flier, while Carter fights his way aboard another, killing all but one of the Pirates, and rescuing a captive Thern princess. From the captured Pirate Xodar, Carter learns that the Black Pirates, called the "First Born", also think of themselves as gods, and accordingly prey upon the Therns; and additionally identifies the captive Thern as Phaidor, daughter of the "Holy Hekkador" (high priest) of the Therns. When their flier is recaptured by the First Born and taken to their underground realm of Omean, Carter is taken before Issus, the self-proclaimed goddess of Barsoom, who dictates the Therns through secret communications which they mistake for divine revelation.