“By George!” exclaimed Billie, sitting up in bed, “there’s something looking in at the window. I believe it’s a dog.”

He got out of bed, and stood directly under the opening, looking upward.

“It is a dog,” he declared. “I wonder whose?” Then all of a sudden: “It might be Pedro’s. Suppose it is! Tanto! Tanto!” he called.

The animal gave a low whine, as of recognition.

“By George, I’m right!” declared Billie, becoming much excited. “There must be somebody with him.

They must be looking for me. Tanto! Tanto!” he again called.

At this the dog gave a sharp bark and immediately disappeared.

For a long time Billie watched the opening for him to reappear, but he did not come back, and Billie finally went and lay down; but not for an instant did he take his eyes from the little window in the ceiling. He could tell by the way the glints of light moved about that fully an hour had passed, when again the opening was darkened and a face appeared at the grating.

“Don Guillermo! Don Guillermo!” a voice softly called, and then Billie recognized that his caller was Pedro’s sister, Guadalupe.

[CHAPTER IX.—GUADALUPE IN DANGER.]