Rojas reached the level of the ledge. He halted. He crouched. It was the act of a panther. Manifestly he saw Mercedes within the cave. Then faint shots patted the air, broke in quick echo. Rojas went down as if struck a heavy blow. He was hit. But even as Gale yelled in sheer madness the bandit leaped erect. He seemed too quick, too supple to be badly wounded. A slight, dark figure flashed out of the cave. Mercedes! She backed against the wall. Gale saw a puff of white--heard a report. But the bandit lunged at her. Mercedes ran, not to try to pass him, but straight for the precipice. Her intention was plain. But Rojas oustripped her, even as she reached the verge. Then a piercing scream pealed across the crater--a scream of despair.

Gale closed his eyes. He could not bear to see more.

Thorne echoed Mercedes's scream. Gale looked round just in time to leap and catch the cavalryman as he staggered, apparently for the steep slope. And then, as Gale dragged him back, both fell. Gale saved his friend, but he plunged into a choya. He drew his hands away full of the great glistening cones of thorns.

"For God's sake, Gale, shoot! Shoot! Kill her! Kill her!...Can't --you--see-Rojas--"

Gale, stunned for the instant, stood with uplifted hands, and gazed from Thorne across the crater. Rojas had not killed Mercedes. He was overpowering her. His actions seemed slow, wearing, purposeful. Hers were violent. Like a trapped she-wolf, Mercedes was fighting. She tore, struggled, flung herself.

Rojas's intention was terribly plain.

In agony now, both mental and physical, cold and sick and weak, Gale gripped his rifle and aimed at the struggling forms on the ledge. He pulled the trigger. The bullet struck up a cloud of red dust close to the struggling couple. Again Gale fired, hoping to hit Rojas, praying to kill Mercedes. The bullet struck high. A third--fourth--fifth time the Remington spoke--in vain! The rifle fell from Gale's racked hands.

How horribly plain that fiend's intention! Gale tried to close his eyes, but could not. He prayed wildly for a sudden blindness --to faint as Thorne had fainted. But he was transfixed to the spot with eyes that pierced the red light.