[4/8] Fleeing the hypnotic slaughter-pits of the Mahars, a lone castaway braves island jungles, monstrous sea serpents, and treacherous tribes as he fights to win freedom—and return for the friend he left behind!!
Edgar Rice Burroughs' "At the Earth's Core" appeared as a four-part serial in ALL-STORY WEEKLY (April 4 to 25, 1914).