A greater commotion in the thicket followed the attack; then another voice, crying out sharply, a second cry from Mary Standish, and he found himself on his knees, twisted backward and fighting desperately to loosen a pair of gigantic hands at his throat.  He could hear the girl struggling, but she did not cry out again.  In an instant, it seemed, his brain was reeling.  He was conscious of a futile effort to reach his gun, and could see the face over him, grim and horrible in the gloom, as the merciless hands choked the life from him.  Then he heard a shout, a loud shout, filled with triumph and exultation as he was thrown back; his head seemed leaving his shoulders; his body crumbled, and almost spasmodically his leg shot out with the last strength that was in him.  He was scarcely aware of the great gasp that followed, but the fingers loosened at his throat, the face disappeared, and the man who was killing him sank back.  For a precious moment or two Alan did not move as he drew great breaths of air into his lungs.  Then he felt for his pistol.  The holster was empty.

He could hear the panting of the girl, her sobbing breath very near him, and life and strength leaped back into his body.  The man who had choked him was advancing again, on hands and knees.  In a flash Alan was up and on him like a lithe cat.  His fist beat into a bearded face; he called out to Mary as he struck, and through his blows saw her where she had fallen to her knees, with a second hulk bending over her, almost in the water of the little spring from which she had been drinking.  A mad curse leaped from his lips.  He was ready to kill now; he wanted to kill—­to destroy what was already under his hands that he might leap upon this other beast, who stood over Mary Standish, his hands twisted in her long hair.  Dazed by blows that fell with the force of a club the bearded man’s head sagged backward, and Alan’s fingers dug into his throat.  It was a bull’s neck.  He tried to break it.  Ten seconds—­twenty—­half a minute at the most—­and flesh and bone would have given way—­but before the bearded man’s gasping cry was gone from his lips the second figure leaped upon Alan.

He had no time to defend himself from this new attack.  His strength was half gone, and a terrific blow sent him reeling.  Blindly he reached out and grappled.  Not until his arms met those of his fresh assailant did he realize how much of himself he had expended upon the other.  A sickening horror filled his soul as he felt his weakness, and an involuntary moan broke from his lips.  Even then he would have cut out his tongue to have silenced that sound, to have kept it from the girl.  She was creeping on her hands and knees, but he could not see.  Her long hair trailed in the trampled earth, and in the muddied water of the spring, and her hands were groping—­groping—­until they found what they were seeking.

Then she rose to her feet, carrying the rock on which one of her hands had rested when she knelt to drink.  The bearded man, bringing himself to his knees, reached out drunkenly, but she avoided him and poised herself over Alan and his assailant.  The rock descended.  Alan saw her then; he heard the one swift, terrible blow, and his enemy rolled away from him, limply and without sound.  He staggered to his feet and for a moment caught the swaying girl in his arms.