He heard the murmur of their voices, but no syllable that could be comprehended reached the crouching figure in the sand.

Suppose they should turn their horses and ride toward him! He could only make a break for the stream and strive desperately for the other shore—a feat which it may be said was impossible of accomplishment, but this was only one of the many risks which a scout has to face when operating in Arizona.

From among the group three warriors emerged on foot. They did not advance toward the solitary figure in the sand, but took a diagonal course to the stream, whose bank they followed until hidden in the gloom. Mendez did not leave or move, but speculated as to the meaning of this singular action.

While still wondering, he heard the signal which Lieutenant Decker mistook for that of a friend.

Mendez was startled, for he recognized its perfect imitation of the call which he had used many times when scouting with the officer. He wondered by what means their enemies had obtained it, and concluded that it was one of those accidental occurrences, such as are seen when two ranchmen, widely separated, fix upon the same brand for their cattle.

The fact caused uneasiness, for the scout feared that it would mislead his friend, but nothing could be done to avert so disastrous a blunder. The officer must be left to his own shrewdness, which, as the reader has learned, proved sufficient for his protection.

Then came the rifle-shot and death cry of one of the hostiles. There could be no misinterpretation of that meaning, and the dusky scout smiled grimly as he reflected that another of the many schemes of the raiders had gone amiss.

If any doubt remained on that point, it was removed a few minutes later, when two warriors were descried returning, whereas three had left the group a short time before. The one stricken down had been allowed to lie where he fell.

It was at this juncture that Mendez became aware of a discomforting fact: the moon was rising and would soon shed a bright illumination over stream and plain. If he remained where he was, discovery was inevitable. He therefore began a cautious withdrawal from the perilous neighborhood.

He adopted a curious artifice. Instead of facing about and creeping away, he imitated the action of Geronimo’s horse some hours before, when confronting Lieutenant Decker. He backed toward the stream, a course which enabled him to keep an eye on his enemies in front.