Jack pointed to the frowning precipice he had scaled. The officers, who could hardly be blamed for doubting him, gazed at the boy sharply. But his frank, honest countenance and modest manner of telling his story soon put their suspicions to rout, although Lieut. Diaz frankly confessed: “Señor, you are an American boy, and therefore tell the truth; but from anyone else we should have laughed at the story.” “It was nothing to laugh at, I assure you,” said Jack. “I should imagine not,” agreed Lieut. Sancho, “one would hardly think a fly could find footing on that place.” “Looking up at it now,” said Jack with a laugh, “I myself begin to doubt that I did it.” A systematic search of the valley was begun, and of course ended without result. One thing only was certain, Alvarez had gone. It was a good thing possibly that Jack did not know then the manner of his going, or what part the boy’s own friends had played in it. Had he done so, he would have felt very downcast over the thought of by how narrow a margin he had missed being reunited to them. “Well,” declared Lieut. Diaz as they came to a halt near the Pool of Death, “one thing is as certain as daylight, and that is that in some manner Alvarez has escaped.” “Not a doubt of it. But how?” rejoined his companion. “I confess I am at a complete loss to understand how he effected his release.” “Maybe another aeroplane came along and took him,” suggested Jack. “That is the only thing I can think of.” Entirely mystified, the two officers made arrangements for flight once more. It had been agreed that Jack was to be landed in the Rangers’ camp, or, at any rate, close to it. The prospect of rejoining his friends safe and sound rejoiced the boy, and he was in high spirits when they sat down to partake of lunch before resuming flight. They had concluded their meal when Jack noticed that there was a peculiar look about the sky. From blue it had turned to a yellowish tinge, and the sun glowed through it like a fiery copper ball. He drew the attention of Lieut. Sancho to this, and the young officer and his comrade in arms held a long consultation about the state of the weather. At its conclusion Lieut. Sancho announced that, although the weather appeared threatening, yet they would go up. He explained that he and his companion had to be back at their headquarters in time to report the rebel attack and the near approach of the reactionary forces. If they were to drop Jack on the way, there was no time to be lost. The aeroplane was swiftly tuned up, and when all were on board Lieut. Diaz, who had relieved Lieut. Sancho at the wheel, sent the big craft up with a velocity that made Jack lose his breath. At a height of about two hundred feet a sudden gust struck the air craft, causing it to careen in a most alarming manner. For one dread instant it appeared to Jack that the whole affair was doomed to turn turtle in mid–air; but the stability devices worked just in time.