Instantly Fyles’s voice rang out. “Halt, or we fire!” he cried.

The horsemen drew rein at once, but the reply was a pistol-shot in the direction whence his voice had sounded. The defiance was Tresler’s signal. He passed the word to his men, and a volley of carbine-fire rang out at once, and confusion in the ranks of the horsemen followed immediately.

Then the battle began in deadly earnest. The sheriff’s men leapt into their saddles, and advanced both in front and in rear of the trapped raiders. And the cowpunchers came racing down from the corrals to hurl themselves into the mêlée whooping and yelling, as only men of their craft can.

The fight waxed furious, but the odds were in favor of the ambush. The clouded sky lent neither side much assistance. Now and again the peeping moon looked down upon the scene as though half afraid to show itself, and it was by those fleeting rays that the sheriff’s men leveled their carbines and poured in their deadly fire. But the raiders were no mean foe. They fought desperately, and were masters in the use of their weapons. Their confusion of the first moment passed instantly, and they rode straight at Tresler’s line of defense with a determination that threatened to overwhelm it and force a passage. But the coming of the cowpunchers stemmed the tide and hurled them back on Fyles’s force in their rear. Several riderless horses escaped in the mêlée; nor were they only belonging to the raiders. One of the “deputies” had dropped from his saddle right beside Tresler, and there was no telling, in the darkness, how many others had met with a similar fate. Red Mask’s gang had been fairly trapped, and both sides meant to fight to a finish.

All this time both Tresler and Fyles were looking out for the leader, the man of all whom they desired to capture. But the darkness, which had favored the ambuscade, now defeated their object. In the mob of struggling humanity it was difficult enough to distinguish friend from foe, let alone to discover any one person. The ranks of the “deputies” had closed right in and a desperate hand-to-hand struggle was going on.

Tresler was caught in the midst of the tide, his crazy mare had carried him there whether he would or no; but if she had carried him thus into deadly peril, she was also ready to fight for him. She laid about her royally, swept on, and reared plunging at every obstruction to her progress, her master thus escaping many a shot, if it left him able to do little better than fire at random himself. In this frantic fashion the maddened creature tore her way through the thick of the fight, and her rider was borne clear to the further outskirts. Then she tried to get away with him, but in the nick of time, before her strong teeth had fixed themselves on the bit, he managed to head her once again for the struggling mass.

With furious recklessness she charged forward, and, as bad luck would have it, her wild career brought about the worst thing possible. She cannoned violently into the sheriff’s charger, while its rider was in the act of leveling his revolver at the head of a man wearing a red mask. The impact was within an ace of bringing both horses and riders to the ground. The mare was flung on her haunches, while Fyles, cursing bitterly, clung desperately to his saddle to retain his seat. But his aim was lost, and his shot narrowly missed his horse’s head; and, before either he or Tresler had recovered himself, the red masked man had vanished into the darkness, heading for the perilous ascent of the valley side.

Terrified out of her life the Lady Jezebel turned swinging round on her haunches, and charged down the valley; and as she went Tresler had the questionable satisfaction of seeing the sheriff detach himself from the mob and gallop in pursuit of the raider.

His own blood was up now, and though the mare had got the bit in her teeth he fought her with a fury equal to her own. He knew she was mistress of the situation, but he simply would not give in. He would kill her rather than she should get away with him this time. And so, as nothing else had any effect on her, he snatched a pistol from its holster and leant over and pounded the side of her head with the butt of it in a wild attempt to turn her. At first she gave not the smallest heed to his blows; such was her madness. But presently she flinched under them and turned her head away, and her body responded to the movement. In another moment he had her round, and as she faced the side of the valley where the raider had disappeared, he slashed her cruelly with his spurs. In a moment the noise of the battle was left behind him, and the mare, with cat-like leaps, was breasting the ascent.