Scotch groaned.

“And have to stay all alone on the desert to-night,” he exclaimed. “We would be devoured a hundred times by wild beasts.”

“It’s not wild beasts we have to fear so much as wild men,” said Frank. “We must keep our eyes about us.”

“What’d we eat for supper?” asked the boy from Vermont, who possessed a very healthy appetite. “That’s what I’d like to know.”

“We would not eat until we found the caravan in the morning.”

“If we did not find the caravan,” put in the professor, “we might starve. There is a fine chance to starve out here.”

“I scarcely think we will starve. I have provided for that.”

“You have? Why, you have brought no provisions.”

“No; but I have brought something that will keep us from starving.”

“What is it?”