"We are like the babes in the wood," said Adan. "I feel as if we never should find our way home again."

"We shall," said Roldan, stoutly; although he, too, felt the chill of the immense solitude. "And we have begun well! What an adventure to start with! I am sure we shall have more."

Adan crossed himself.

The boys rode at a long even gallop, the high chaparral closing behind them. Every half hour they paused, and Roldan, dismounting, held his ear to the ground. But as yet they were unpursued.

A soft wind blew over the plain, fragrant with the honeydew of the chaparral. The sun set in a great bank of yellow cloud. Then the night came suddenly.

A few moments later Roldan called: "Halt!" and held up his hand. "I hear the rush of the water," he said. "We must be near the river."

"It sounds as if it was high," said Adan. "It has rained hard this month. Suppose these horses don't swim?"

"We'll make them. Come on."

"Ay! yi!" exclaimed Adan, not many moments after.

They pulled up suddenly on the banks of the river, a body of water about three hundred yards wide. It was swollen almost level with the high banks. The tumultuous waters were racing as if Neptune astride them was fleeing from angry gods. There is something unhuman in the roar of an angry river: it has a knell in it.