No one could tell him. All that they knew was that when the tribe set out from their old dwellings Hud and Nat-ul could not be found, and then Ra-el had come forward and said that the two had fled together. When he questioned Ra-el he could glean nothing more from her, but she stuck obstinately to her assertion that Nat-ul had gone willingly. "And will Nu, the son of Nu, be such a fool as to follow after a woman who has chosen another mate when there are those as beautiful whom Nu, the son of Nu, could have for the asking?" she said. At her words the young man saw the motive behind her statement that Nat-ul had run away voluntarily with Hud, and now he was more positive than ever that the girl did not speak the truth. Her words recalled many little occurrences in the past that had slipped by unnoticed at a time when all his thoughts were of the splendid Nat-ul. It was evident that Ra-el would have liked Nu for herself. The young man returned to his father's side. "I go," he said, "nor shall I return until I know the truth." The older man laid his hand upon the shoulder of the younger. "Go, my son," he said; "your father's heart goes with you." In silence Nu, the son of Nu, retraced his steps southward toward the Barren Cliffs. It was his intention to return directly to the former dwellings of his people and there search out the spoor of Hud and Nat-ul. A great rage burned in his heart as he thought of the foul deed that Hud had done. The tribe of Nu had progressed far beyond the status of the beasts. They acknowledged certain property rights, among them the inalienable right of the man to his mate, and, going a step further, the right of the woman to mate as she chose. That Nat-ul had chosen to mate with Hud, Nu could not for a moment admit. He knew the courageous nature of the girl, and, knowing it, knew that had she preferred Hud to him she would have mated with the man of her choice openly after the manner of the tribe. No, Nat-ul would never have run off with any man--not even himself. Half way up the face of the Barren Cliffs Nu was arrested by a faint moan, coming apparently from a cave at his right. He had no time to devote to the pleasures of the chase, but there was a human note in the sound that he had heard that brought him up all suddenly alert and listening. After a moment it was repeated. No, there could be no doubt of it--that sound came only from a human throat. Cautiously Nu crept toward the mouth of the cave from which the moaning seemed to issue. At the entrance he came to a sudden halt, at the sight that met his eyes. There, in the half light of the entrance, lay Hud in a pool of blood. The man was breathing feebly. Nu called him by name. Hud opened his eyes. When he saw who stood over him he shrugged his shoulders and lay still, as though to say, the worst has already been done to me--you can do no more. "Where is Nat-ul?" asked Nu. Hud shook his head. Nu knelt beside him raising his head in his arms.