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."

Chapter XVI

The Night Attack

As the girl turned to bid them good night, she thought that she saw a shadowy form moving in the darkness beyond them, and almost simultaneously she was sure that she heard the sounds of stealthy movement in the same direction.

"What is that?" she whispered. "There is something out there in the darkness."

"Yes," replied Tarzan, "it is a lion. It has been there for some time. Hadn't you noticed it before?"

"Oh!" cried the girl, breathing a sigh of relief, "is it our lion?"

"No," said Tarzan, "it is not our lion; it is another lion and he is hunting."