space in the jungle. Tarzan's keen eyes sought quickly for an explanation of the animal's action.
"What have we here! " he cried, swinging from his saddle, and a moment later the four were grouped about a human skull and a little litter of whitened human bones.
Tarzan stooped and lifted a leathern pouch from the grisly relics of a man. The hard out lines of the contents brought an exclamation of surprise to his lips.
"The jewels of Opar!" he cried, holding the pouch aloft, "and," pointing to the bones at his feet, "all that remains of Werper, the Belgian."
Mugambi laughed. "Look within, Bwana," he cried, "and you will see what are the jewels of Opar — you will see what the Belgian gave his life for," and the black laughed aloud.
"Why do you laugh?" asked Tarzan.
"Because," replied Mugambi, "I filled the Belgian's pouch with river gravel before I escaped the camp of the Abyssinians whose prisoners we were. I left the Belgian only worthless stones, while I brought away with me the jewels he had stolen from you. That they were
