He spoke to her a second time, and at last she answered; but in a tongue which he did not understand. It bore not the slightest resemblance to any language, modern or dead, with which he was familiar, and Waldo was more or less master of them all--especially the dead ones. He tried not to look at her after that, for he realized that he must appear very ridiculous. But now his attention was required by more pressing affairs--the cave men were returning to the attack. They carried stones this time, and, while some of them threw the missiles at Waldo, the others attempted to rush his position. It was then that the girl hurried back into the cave, only to reappear a moment later carrying some stone utensils in her arms. There was a huge mortar in which she had collected a pestle and several smaller pieces of stone. She pushed them along the ledge to Waldo. At first he did not grasp the meaning of her act; but presently she pretended to pick up an imaginary missile and hurl it down upon the creatures below--then she pointed to the things she had brought and to Waldo. He understood. So she was upon his side. He did not understand why, but he was glad. Following her suggestion, he gathered up a couple of the smaller objects and hurled them down upon the men beneath. But on and on they came--Waldo was not a very good shot. The girl was busy now gathering such of the cave men's missiles as fell upon the ledge. These she placed in a pile beside Waldo. Occasionally the young man would strike an enemy by accident, and then she would give a little scream of pleasure--clapping her hands and jumping up and down. It was not long before Waldo was surprised to find that this applause fell sweetly upon his ears. It was then that he began to take better aim. In the midst of it all there flashed suddenly upon him a picture of his devoted mother and the select coterie of intellectual young people with which she had always surrounded him. Waldo felt a new pang of horror as he tried to realize with what emotions they would look upon him now as he stood upon the face of a towering cliff beside an almost naked girl hurling rocks down upon the heads of hairy men who hopped about, screaming with rage, below him. It was awful! A great billow of mortification rolled over him. He turned to cast a look of disapprobation at the shameless young woman behind him--she should not think that he countenanced such coarse and vulgar proceedings. Their eyes met--in hers he saw the sparkle of excitement and the joy of life and such a look of comradeship as he never before had seen in the eyes of another mortal. Then she pointed excitedly over the edge of the ledge. Waldo looked. A great brute of a cave man had crawled, unseen, almost to their refuge. He was but five feet below them, and at the moment that he looked up Waldo dropped a fifty-pound stone mortar full upon his upturned face.