After one swift appraising glance the new-comer rode straight to the verge of the water-hole and dismounted; then he and his horse drank side by side.

It was the moment for a complete and effective surprise, but nothing happened. Why didn't Law act? Alaire bent low, straining eyes and ears, but no command came from the Ranger. After a while the traveler rose to his feet and stretched his limbs. Next he walked to the ashes of the fire and looked down at them, stirring them with his toe. Apparently satisfied, he lit a cigarette.

Could it be that something had gone wrong with the Ranger's plan? Had something happened to him? Alaire was startled by the possibility; this delay was beyond her comprehension.

Then, as if in answer to her perplexity, a second horseman appeared, and the woman realized how simply she had been fooled.

III

WHAT HAPPENED AT THE WATER-HOLE

The new-comers exchanged a word or two in Spanish, then the second rider flung himself from his saddle and made for the water. He was lying prone and drinking deeply when out of nowhere came a sharp command.

"Oiga! Hands up, both of you!"

The first arrival jumped as if a rattlesnake had buzzed at his back, the second leaped to his feet with an oath; they stared in the direction whence the voice had come.

"Drop your gun, companero!" The order was decisive; it was directed at the man who had first appeared, for the other had left his Winchester in its scabbard.