into a large pocket or gulch entirely inclosed by steep walls of rock. Except for the small passageway from the gorge, there was no other entrance to the gulch which was some hundred feet in length and about fifty in width and appeared to have been worn from the rocky cliff by the falling of water during long ages. A tiny stream from Kilimanjaro's eternal snow cap still trickled over the edge of the rocky wall at the upper end of the gulch, forming a little pool at the bottom of the cliff from which a small rivulet wound downward to the tunnel through which it passed to the gorge beyond. A single great tree flourished near the center of the gulch, while tufts of wiry grass were scattered here and there among the rocks of the gravelly floor.
The bones of many large animals lay about and among them were several human skulls. Tarzan raised his eyebrows. "A man-eater," he murmured, "and from appearances he has held sway here for a long time. Tonight Tarzan will take the lair of the man-eater and Numa may roar and grumble upon the outside."
The ape-man had advanced well into the gulch as he investigated his surroundings and now as he stood near the tree, satisfied that the tunnel would prove a dry and quiet retreat for the night, he turned to retrace his way to the outer end of the entrance that he might block it with bowlders against Numa's return; but even with the thought there came something to his sensitive ears that froze him into statuesque immobility with eyes glued upon the tun-
