"Good! good! good!" he whispered, rapidly, in a strange bodiless voice; "'t will serve! 't will serve! And you are a soldier too--and know how to use it! Good, it is a Providence!" He lifted his hollow eyes to heaven, and then added, "Come! come!" Carroll stepped towards him. He was alone and in the presence of an undoubted madman--one strong enough, in spite of his years, to inflict a deadly injury, and one whom he now began to realize might have done so once before. Nevertheless, he laid his hand on the old man's arm, and, looking him calmly in the eye, said, quietly, "Come? Where, Pereo? I have only just arrived." "I know it," whispered the old man, nodding his head violently. "I was watching them, when you rode up. That is why I lost the scent; but together we can track them still--we can track them. Eh, Captain, eh! Come! Come!" and he moved slowly backward, waving his hand towards the door. "Track whom, Pereo?" said Carroll, soothingly. "Whom do you seek?" "Whom?" said the old man, startled for a moment and passing his hand over his wrinkled forehead. "Whom? Eh! Why, the Dona Maruja and the little black cat--her maid--Faquita!" "Yes, but why seek them? Why track them?" "Why?" said the old man, with a sudden burst of impotent passion. "YOU ask me why! Because they are going to the rendezvous again. They are going to seek him. Do you understand--to seek HIM--the Coyote!" Carroll smiled a faint smile of relief--"So--the Coyote!" "Ay," said the old man, in a confidential whisper; "the Coyote! But not the big one--you understand--the little one. The big one is dead--dead--dead! But the little one lives yet. You shall do for HIM what I, Pereo--listen--" he glanced around the room furtively--"what I--the good old Pereo, did for the big one! Good, it is a Providence. Come!" Of the terrible thoughts that crossed Carroll's mind at this unexpected climax one alone was uppermost. The trembling irresponsible wretch before him meditated some vague crime--and Maruja was in danger. He did not allow himself to dwell upon any other suspicion suggested by that speech; he quickly conceived a plan of action. To have rung the bell and given Pereo into the hands of the servants would have only exposed to them the lunatic's secret--if he had any--and he might either escape in his fury or relapse into useless imbecility. To humor him and follow him, and trust afterwards to his own quickness and courage to avert any calamity, seemed to be the only plan. Captain Carroll turned his clear glance on the restless eyes of Pereo, and said, without emotion, "Let us go, then, and quickly. You shall track them for me; but remember, good Pereo, you must leave the rest to me."