Opar, but there seemed to hang over the accursed city a guardian demon that threatened the life of whosoever dared approach the forbidden spot or wrest from the forgotten treasure vaults a portion of their great hoard.
For more than an hour his guide led him through the Stygian darkness of underground passages, until, ascending a flight of steps they emerged into the center of a clump of bushes, through which the pale light of the moon was barely discernible. The fresh air, however, told him that they had reached the surface of the ground, and now the woman, who had not spoken a word since she had led him from his cell, continued on in silence, following a devious trail that wound hither and thither in an erratic fashion through a heavy forest choked with undergrowth, and always upward.
From the location of the stars and moon, and from the upward trend of the trail, Tarzan knew that he was being led into the mountains that lie behind Opar—a place he had never thought of visiting, since the country appeared rough and uninviting, and not likely to harbor game such as Tarzan cared most to hunt. He was already surprised by the nature of the vegetation, for he had thought the hills barren except for stunted trees and scraggy bush. As they continued upon their way, climbing ever upward, the moon rose higher in the heavens, until its soft light revealed more clearly to the keen eyes of the ape-man the topog-
