the passage was downward, though not steeply, but it seemed interminable and he wondered to what distant subterranean lair it might lead. There was a feeling that perhaps after all he might better have remained in the larger chamber and risked all on the chance of subduing the gryf where there was at least sufficient room and light to lend to the experiment some slight chance of success. To be overtaken here in the narrow confines of the black corridor where he was assured the gryf could not see him at all would spell almost certain death and now he heard the thing approaching from behind. Its thunderous bellows fairly shook the cliff from which the cavernous chambers were excavated. To halt and meet this monstrous incarnation of fury with a futile whee-oo! seemed to Tarzan the height of insanity and so he continued along the corridor, increasing his pace as he realized that the gryf was overhauling him.
Presently the darkness lessened and at the final turning of the passage he saw before him an area of moonlight. With renewed hope he sprang rapidly forward and emerged from the mouth of the corridor to find himself in a large circular enclosure the towering white walls of which rose high upon every side—smooth perpendicular walls upon the sheer face of which was no slightest foothold. To his left lay a pool of water, one side of which lapped the foot of the wall at this
