Arabian thieves led by the diabolically clever Mohallet set one fiendish trap after another for Doc Savage and his mighty five. Only Doc, with his superhuman mental and physical powers, could have withstood this incredible ordeal of endurance which led from the cavern of the crying rock through the pitiless desert of Rub' Al Khali and its Phantom City to a fight to the death against the last of a savage prehistoric race of white-haired beasts.

First published in Doc Savage Magazine # 10 December 1933 - written by Lester Dent.