"A little too close to be pleasant," thought our hero as he heard the missile hum past his head, and saw the splash of sand it made beyond him. "I'll let Sultan out a little, and increase the distance, so that, if one of his bullets happens to strike us, no great damage will be inflicted. That's doing it! That's making him writhe with anger! He's grandly mounted, and I shouldn't wonder if he had the idea that there was nothing he couldn't come up with; but Sultan knows better. Don't we?" He leaned forward in his saddle and patted his horse's neck, while he glanced backward again at the pursuing Arab. That sudden spurt had taken him some hundred yards in front of his enemy, and even at that distance Geoff could see the chief brandishing his smoking weapon, and could hear as he shouted curses at him. Then slowly, almost imperceptibly, he circled from his course, till in a while he was heading almost direct for the point where Daglish was waiting. "Give him another two or three shots at the most," thought Geoff, casting many glances over his shoulder. "That Arab fellow may have two or three pistols with him--double-barrelled fellows--and if he's rich and lucky it may be that he's got a revolver. But I'll wager my hat that he ain't, or he'd have used it already." Ping! There came another shot, very wide of the mark, for the rage into which the Arab chief had worked himself, and the disappointment he was suffering, had unsteadied him--that and his frantic gallop across the desert. By now, too, his horse was blowing hard, and was slackening its pace, a fact which Geoff noted clearly, and made allowance for by holding Sultan in and curbing his paces. It was perhaps a minute later when he swung Sultan round on his haunches and pulled him in abruptly, the sudden halt causing the Arab to decrease the distance between them rapidly and to come rushing towards them. "Now shall Allah reward me!" the chief bellowed, his eyes gleaming, his teeth set, and his lips parted in a snarl of triumph and anger. Thrusting his empty pistol back into his belt, he dived for his curved scimitar, which was dangling beside him, and, getting his horse well in hand at the same moment, sped onwards without halting. It was then that Geoff revealed his own weapon, and, taking careful aim, pressed the trigger. An instant later the horse which the chief was riding reared up on its hind legs, whinnying loudly, and there for a moment it stood, pawing the air and snorting; then it collapsed of a sudden, as if the strength which had permitted it to fly so rapidly across the desert had been suddenly torn from it, and, crumpling up, fell back, bearing its rider with it.