A narrow, white beam, blindingly brilliant, flashed from beyond the dull green foliage of the mesquite. It struck the crouching monster waveringly. Without a sound, it leapt, flinging itself aside from the body of the Prince. It raised its curious weapon. A tiny purple spark darted from it.

A shattering crash rang out at a little distance. There was a thin scream—a woman's scream.

Then the white ray stabbed at the monster again, and it collapsed in a twitching heap of thin green coils, upon the still body of the Prince.

A slender girl rushed out of the brush, tossed aside a ray pistol, and flung herself upon the monster, trying to drag it from the Prince. It was Paula Trainor. Her clothing was torn. Her skin was scratched and bleeding from miles of running through the desert of rocks and cactus and thorny mesquite. She was evidently exhausted. But she flung herself with desperate energy to the rescue of the injured man.

The body of the dead thing was light enough. But the sucking disks still clung to the flesh. They pulled and tore it when she tugged at them. She struggled desperately to drag them loose, by turns sobbing and laughing hysterically.

"If you can help us get loose, we might help," Bill suggested.

The girl raised a piteous face. "Oh, Mr. Bill—Captain Brand! Is he dead?"

"I think not, Miss Paula. The thing had just jumped on him. Buck up!"

"See the little bar—it looks like a sliver of aluminum—fastened to the metal ring about that coil?" Brand said. "It might be the key for these chains. End of it seems to be shaped about right. Suppose you try it?"

In nervous haste, the girl tore the little bar from its ring. With Brand's aid, she was able to unlock his fetters. The Captain lost no time in freeing Bill and removing the manacles from the unconscious Prince.