denly, to the surprise of both the girl and Smith-Oldwick, he dropped to his hands and knees and sniffed at the tracks—again a beast utilizing the senses and woodcraft of a beast. Over an area of several square yards his keen nostrils sought the identity of the makers of the tracks. At length he rose to his feet.
"It is not the spoor of the Gomangani," he said, "nor is it exactly like that of white men. There were three who came this way. They were men, but of what race I do not know."
There was no apparent change in the nature of the gorge except that it had steadily grown deeper as they followed it downward until now the rocky and precipitous sides rose far above them. At different points natural caves, which appeared to have been eroded by the action of water in some forgotten age, pitted the side walls at various heights. Near them was such a cavity at the ground's level—an arched cavern floored with white sand. Tarzan indicated it with a gesture of his hand.
"We will lair here tonight," he said, and then with one of his rare, slow smiles: "We will camp here tonight."
Having eaten their meager supper Tarzan bade the girl enter the cavern.
"You will sleep inside," he said. "The lieutenant and I will lie outside at the entrance."
