Again they sat down, Lacy being very dejected.

The dog, who had been nosing about considerably, suddenly started off at a quick bound, at the same time uttering a short bark.

“He has struck the trail of something!” exclaimed Reginald Lacy, springing to his feet as quickly as his feeble condition would allow him.

“Let us follow him,” says Leo.

Away they went after Jupiter, in the hopes that he was about to start up some game.

They had no sooner entered a small passage between two clefts of rock than they were startled by hearing a wild scream.

“Great God!” exclaimed Lacy. “What is that?”

“It sounds to me like the cry of a female in distress,” replied his young companion, turning about and starting hurriedly in the direction the scream came from.

In a few seconds Leo came in sight of Azurma, with the horrible picuasus pursuing her.

Again a wild scream left the girl’s lips, and though the distance was rather great, the boy instantly concluded to risk a shot.