A few minutes later the Sheik left him and went out into the night. He traversed the short distance between the tents slowly, stopping to speak to a sentry, and then pausing outside his own tent to look up at the stars. The Persian hound that always slept across the entrance uncurled himself and got up, thrusting a wet nose into his hand. The Sheik fondled the huge creature absently, stroking the dog's shaggy head mechanically, hardly conscious of what he was doing. A great restlessness that was utterly foreign to his nature had taken possession of him. He had been aware of it growing within him for some time, becoming stronger daily, and now the coming of Raoul de Saint Hubert seemed to have put the crowning touch to a state of mind that he was unable to understand. He had never been given to thinking of himself, or criticising or analysing his passing whims and fancies. All his life he had taken what he wanted; nothing on which he had ever laid eyes of desire had been denied him. His wealth had brought him everything he had ever wished. His passionate temper had been characteristic even when he was a child, but these strange fits of unreasonable irritability were new, and he searched for a cause vainly. His keen eyes looked through the darkness towards the south. Was it the nearness of his hereditary enemy, who had presumed to come closer than he had ever done before to the border of the country that Ahmed Ben Hassan regarded as his own, that was causing this great unrest? He laughed contemptuously. Nothing would give him greater pleasure than coming into actual collision with the man whom he had been trained from boyhood to hate. As long as Ibraheim Omair remained within his own territory Ahmed Ben Hassan held his hand and kept in check his fierce followers, whose eyes were turned longingly towards the debatable land, but once let the robber Sheik step an inch over the border, and it was war, and war until one or both of the chiefs were dead. And if he died who had no son to succeed him; the huge tribe would split up in numerous little families for want of a leader to keep them together, and it would be left to the French Government to take over, if they could, the vast district that he had governed despotically. And at the thought he laughed again. No, it was not Ibraheim Omair who was troubling him. He pushed the hound aside and went into the tent. The divan where Diana had been sitting was strewn with magazines and papers, the imprint of her slender body still showed in the soft, heaped-up cushions, and a tiny, lace-edged handkerchief peeped out under one of them. He picked it up and looked at it curiously, and his forehead contracted slowly in the heavy black scowl. He turned his burning eyes toward the curtains that divided the rooms. Saint Hubert's words rang in his ears. "English!" he muttered with a terrible oath. "And I have made her suffer as I swore any of that damned race should if they fell into my hands.