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94 "We are friends," replied Carthoris. "This be the princess, Thuvia of Ptarth, who was captured by the Torquasian horde. I am Carthoris of Helium, Prince of the house of Tardos Mors, Jeddak of Helium, and son of John Carter, Warlord of Mars, and of his wife, Dejah Thoris."

"'Ptarth'?" repeated the man. "'Helium'?" He shook his head. "I never have heard of these places, nor did I know that there dwelt upon Barsoom a race of thy strange color. Where may these cities lie? From our loftiest tower we have never seen another city than Lothar."

Carthoris pointed toward the northeast.

"In that direction lie Helium and Ptarth," he said. "Helium is over eight thousand haads from Lothar, while Ptarth lies nine thousand five hundred haads northeast of Helium."