"Yes," replied Dian, "but they don't count--they all have mates. Jubal's brothers have no mates because Jubal could get none for himself. He was so ugly that women ran away from him--some have even thrown themselves from the cliffs of Amoz into the Darel Az rather than mate with the Ugly One." "But what had that to do with his brothers?" I asked. "I forget that you are not of Pellucidar," said Dian, with a look of pity mixed with contempt, and the contempt seemed to be laid on a little thicker than the circumstance warranted--as though to make quite certain that I shouldn't overlook it. "You see," she continued, "a younger brother may not take a mate until all his older brothers have done so, unless the older brother waives his prerogative, which Jubal would not do, knowing that as long as he kept them single they would be all the keener in aiding him to secure a mate." Noticing that Dian was becoming more communicative I began to entertain hopes that she might be warming up toward me a bit, although upon what slender thread I hung my hopes I soon discovered. "As you dare not return to Amoz," I ventured, "what is to become of you since you cannot be happy here with me, hating me as you do?" "I shall have to put up with you," she replied coldly, "until you see fit to go elsewhere and leave me in peace, then I shall get along very well alone." I looked at her in utter amazement. It seemed incredible that even a prehistoric woman could be so cold and heartless and ungrateful. Then I arose. "I shall leave you NOW," I said haughtily, "I have had quite enough of your ingratitude and your insults," and then I turned and strode majestically down toward the valley. I had taken a hundred steps in absolute silence, and then Dian spoke. "I hate you!" she shouted, and her voice broke--in rage, I thought. I was absolutely miserable, but I hadn't gone too far when I began to realize that I couldn't leave her alone there without protection, to hunt her own food amid the dangers of that savage world. She might hate me, and revile me, and heap indignity after indignity upon me, as she already had, until I should have hated her; but the pitiful fact remained that I loved her, and I couldn't leave her there alone. The more I thought about it the madder I got, so that by the time I reached the valley I was furious, and the result of it was that I turned right around and went up that cliff again as fast as I had come down. I saw that Dian had left the ledge and gone within the cave, but I bolted right in after her. She was lying upon her face on the pile of grasses I had gathered for her bed. When she heard me enter she sprang to her feet like a tigress. "I hate you!" she cried. Coming from the brilliant light of the noonday sun into the semidarkness of the cave I could not see her features, and I was rather glad, for I disliked to think of the hate that I should have read there.