was nothing human in the bared fangs, or the catlike leaps. Mbonga's warriors were terrified—too terrified to leave the seeming security of their huts while they watched the beast-man spring full upon the back of their old chieftain.
Mbonga went down with a scream of terror. He was too frightened even to attempt to defend himself. He just lay beneath his antagonist in a paralysis of fear, screaming at the top of his lungs. Tarzan half rose and kneeled above the black. He turned Mbonga over and looked him in the face, exposing the man's throat, then he drew his long, keen knife, the knife that John Clayton, Lord Greystoke, had brought from England many years before. He raised it close above Mbonga's neck. The old black whimpered with terror. He pleaded for his life in a tongue which Tarzan could not understand.
For the first time the ape-man had a close view of the chief. He saw an old man, a very old man with scrawny neck and wrinkled face—a dried, parchment-like face which resembled some of the little monkeys Tarzan knew so well. He saw the terror in the man's eyes—never before had Tarzan seen such terror in the eyes of any animal, or such a piteous appeal for mercy upon the face of any creature.
Something stayed the ape-man's hand for an instant. He wondered why it was that he hesitated to make the kill; never before had he thus delayed.
