“I didn’t even wing him,” was Billie’s crestfallen reply. “He must bear a charmed life. But I’ll get him yet, if I have to stay in Mexico all summer!”

Santiago raised his eyes, and a fierce smile played upon his lips, as he fixed his gaze upon Billie.

“Do you mean it, señor?” he asked.

“You bet I do!”

“Promise me!”

“Sure, if that will do you any good!” replied Billie lightly.

“Look out!” exclaimed Adrian. “That may mean more than you think!”

“I don’t care what it means,” declared Billie; “I’ve given my word, and I’ll stick to it!”

Santiago reached out and took him feebly by the hand. “You will never regret it,” he said. “When you have made your promise good, come back to me for your reward.”

And then the strange man swooned in Donald’s arms.