For a while Tarzan watched them in silence and then a slow smile overspread his countenance. "You must have buried it deep, Usula," he said.
The black scratched his head. "No, not so deep as this, Bwana," he cried. "I cannot understand it. We should have found the gold before this."
"Are you sure you are looking in the right place?" asked Tarzan.
"This is the exact spot, Bwana," the black assured him, "but the gold is not here. Someone has removed it since we buried it."
"The Spaniard again," commented Tarzan. "He was a slick customer."
"But he could not have taken it alone," said Usula. "There were many ingots of it."
"No," said Tarzan, "he could not, and yet it is not here."
The Waziri and Tarzan searched carefully about the spot where the gold had been buried, but so clever had been the woodcraft of Owaza that he had obliterated even from the keen senses of the ape-man every vestige of the spoor that he and the Spaniard had made in carrying the gold from the old hiding place to the new.
"It is gone," said the ape-man, "but I shall see that it does not get out of Africa," and he despatched runners in various directions to notify the chiefs of the friendly tribes surrounding his domain to watch carefully every safari crossing their territory, and to let none pass who carried gold.
