CHAPTER XVIII. — THE NICK OF TIME.

The peril which menaced the explorers was more frightful than any that they had been called upon to face since entering that mysterious land known by the name of the Matto Grosso.

The Aryks numbered more than half a hundred, all active, vigilant and armed with their fearful poisoned javelins. They had taken position among the trees on the western bank of the Xingu, at the base of the rapids, at the very point where the white men intended to shoulder their canoe and make their last portage.

Instead of being in the open, where they were in plain sight of the defenders, and fair targets for their unerring Winchesters, they were stationed behind the numerous trunks or lying on the ground, where little could be seen of them except their bushy heads and gleaming black eyes, as they glared with inextinguishable hate at the white men who had slain so many of their number.

The suspicious Long was looking in the direction, with the thought that if any ambush was attempted, that would be the very spot, when he caught sight of a dusky figure, as it whisked from behind a narrow trunk to another that afforded better cover.

That hasty glance in the dim morning light revealed an alarming number of heads glaring around the trees and from among the undergrowth like so many wild beasts, aflame with fury and the exultation of savages who knew that their enemies were at last forced inextricably into their grasp.

So assured were the Aryks in fact that they showed a disposition to toy for a moment with their victims, as a cat does with a mouse before craunching it in her jaws. They brandished their weapons, danced grotesquely and uttered shrill shrieks audible above the deafening roar of the angry Xingu as it foamed through the rapids.

It was a fearful trap in which our friends found themselves, for it was impossible to advance or retreat, and it was madness to hope that they could again escape the shower of spears that were already poised in the air and ready to be launched.

Bippo and Pedros, with wild shrieks of terror bounded into the canoe, and wrapping the blankets around them, cowered in abject helpless dread of impending death. They were only an incumbrance, as they had proven in more than one crisis before.