"Here we rest," said Bill Breakstone. "What more could a man ask? Plenty of sand for all to sleep on. No crowding. Regular king's palace. Water in the water-bags, and firewood ready for us."

"Firewood," said John Bedford. "I fail to see it."

Breakstone pointed scornfully to the huge cactus.

"There it is, a whole forest of it," he said. "We break down that cactus, which is old and dry, and it burns like powder. But it will burn long enough to boil our coffee, which we need."

But they took a good drink of water first, and gave another to every one of the horses. Then they chopped down the giant cactus and cut it into lengths. As Breakstone had said, it burned with a light flame and was rapidly consumed, leaving nothing but thin ashes. But they were able to boil their coffee, which refreshed them even more than the food, and then they lay on their blankets, taking a deep, long rest. The contrast between night and day was extraordinary. The sun seemed to have taken all heat with it, and the wind blew. They could put on coats again, draw blankets over their bodies, and get ready for delicious sleep. They knew that the sun with all its terrors would come back the next day, but they resolved to enjoy the night and its coolness to the full.

The wind rose, and dust and sand were blown across the plain, but it passed over the heads of the four who lay in the narrow dip between the swells, and they soon fell into a sleep that built up brain and muscle anew for the next day's struggle.

CHAPTER XX

THE SILVER CUP

They awoke at the coming dawn, which began swiftly to drive away the coolness of the night, and, using what was left of the giant cactus, they boiled coffee and heated their food again. This was a brief task, but by the time it was finished the whole world was enveloped once more in a reddish glare. All that day they advanced, alternately riding and walking through an absolutely desolate land. The single cactus that they had burned loomed in Phil's memory like a forest. The water was doled out with yet more sparingness, and, a few minutes after they drank it, throat, tongue, and lips began to feel as parched as ever.

Phil did not see a living thing besides themselves. No rattlesnake, no lizard, no scorpion dwelled in this burning sand. Two or three of the horses began to show signs of weakness.