The moment these enemies had passed them by, Ixtli urged Bruno on, then, in swift whispers, instructed him how to perfect his hiding, even aiding the young paleface into one of the upright crypts, back of a grim skeleton, the mouldering blankets assisting in covering the one of flesh and blood.

After like fashion, the Aztec sought cover on the opposite side of the passage. None too quickly, either; for now the single searcher drew dangerously nigh, peering into every practicable hiding-place on either side, before moving onward.

Little by little he drew closer, while the other band of searchers apparently turned off into a side passage, or large chamber, since nothing could be seen or heard of them by the fugitives.

In all probability, Ixtli's bold ruse would have proved a complete success, for the Aztec warrior showed no suspicion as he drew nearer; but it was not to be thus.

Fairly holding his breath, lest he disturb some of the dry bones immediately in front of himself, Bruno waited and hoped, only to feel his blood chill, and his heart fail him, as a sickening horror crept over his brain; nor was that the only creeping thing,—worse luck!

Past all room for doubting, his entrance into that crypt had disturbed the repose of a snake of some description; for now he could feel the loathsome reptile crawling slowly up his back, turning the skin beneath to scorching ice in its horrid passage.

One horrible nightmare minute that lasted, then the serpent paused upon his shoulder and biceps, touching his cheek with nose, then drawing back its ugly head to give an ominous hiss.

Human flesh and blood could endure no more, and Bruno flung the snake violently off, striking forcibly against that mass of dry bones as he did so. With a rattling clatter, the skeleton lost its frail coherence and tumbled outward, leaving Bruno fairly exposed within the niche.

With a cry the Aztec warrior turned in that direction, but ere he could fetch his light to bear upon the right spot, Ixtli sprung forth to the rescue, hooting like a frightened owl, as he dashed the light to earth, and, at the same time, deftly tripping the Indian headlong.

Swift as thought itself he followed up the advantage thus won, smiting the fallen brave heavily upon the crown with a clubbed thighbone, depriving him of sensibility for the time being at least. And then snatching up the still burning light, he called, in guarded tones, to his white friend: