It was agreed, therefore, that they should continue on up the ravine, as this offered so much the better chance for their mustangs to make good progress. Waukko took the lead, his horse walking at a steady gait, while he scrutinized the camp-fire as closely and searchingly as if his life depended on the result. The flame seemed to have been started directly behind a mass of rocks, large and compact enough to shelter a dozen men, if they wished to conceal themselves. The smoke showed that it was burning so vigorously that fuel must have been placed upon it but a short time before. It would seem that, if set going by hostile hands, the owners were short-sighted in thus exposing their location; but the mischief of such a thing is that the smoke of a camp-fire in an Indian country may have one or more of a dozen dangerous meanings. In the West and Southwest the Indians have a system of telegraphy, conducted entirely by means of signal fires from mountain top to mountain top. Treaties signed in Washington in one day have been known hundreds of miles away at night, by the redskins chiefly concerned, who had no means of gaining the news except by some system of telegraphy, understood only by themselves. The most cunning and effective war movements, where the success depends upon the cooperation of widely separated parties, have been managed and conducted by the smoke curling upward from hills and mountain peaks. Still further, a camp-fire is frequently used as a way of confusing an approaching enemy, for by what means could the latter judge whether the parties who had kindled it were in the immediate neighborhood? Was there not, in this instance, one stealthy Kiowa carefully keeping up the blaze, while his companions had stolen around and across the chasm, where they were ambushed and awaiting the coming of their victims? Were not the sly dogs successful in hiding their positions by the very means which would generally be supposed to betray it? At any rate, Waukko was not yet abreast of the dangerous point when he again checked his mustang, and the three Apaches consulted in a low voice and with every appearance of suppressed excitement. There was something in the wind which made all three feel anything but comfortable. The consultation was brief and decisive. Waukko and one of his warriors dismounted, leaving Fred and his guardian upon the remaining horse. Waukko moved off to the right, as though he meant to reconnoiter the camp-fire, while the other savage stole off to the left. Very evidently there was something which needed looking after, and it may have been that Waukko was in quest of information for his leader, Lone Wolf. Be that as it may, before Fred Munson fairly suspected it he found himself alone with another mounted Apache, both the others having vanished as effectually as if the ground had opened and swallowed them up.