That night was one of fearful length, it seemed. As it wore on, and the parched throats of the travelers called for water where there was none, it became a torture.

Morning came, and the sun blazed down hotter than ever. The horses and mules acted as if crazed, but they were urged on relentlessly. The tongues of Jack and his comrades began to get thick in their mouths. Those of the animals were hanging out, and foam was falling from their lips where the bits chafed.

At noon, though Tanker Ike strained his eyes for a sight of the Shoshone River or for some water hole, there was no sign of either. On and on they pushed, trying to swallow to relieve their terrible thirst.

Suddenly the horse which Sam rode gave a leap forward, and then began to go around in a circle.

“That’s bad,” murmured Ike in a low voice. “He’s beginning to get locoed from want of water.”

He urged his own beast up to Sam’s, and gave the whirling animal a cut with the quirt. That stopped it for a while, and they went on.

Mexican Pete and Tanker Ike said little. They were men used to the hardships of the West, and it was not the first time they had suffered in crossing the desert. But it was hard for Jack and his chums. Nevertheless, they did not complain, but taking an example from the men, silently rode their horses. The poor beasts must have suffered dreadfully.

Tanker Ike, who was riding ahead, suddenly leaped off his horse. At first the boys thought he had seen a water hole, but he merely picked up some pebbles from the sand.

“Put some of these in your mouth and roll them around,” he said. “It will help to make the saliva come and keep down your thirst some.”