“Yes, without doubt, Bart,” exclaimed the Doctor, watching them. “Yes, they mean to get somewhere close up. There will be an attack to-night.”

“Then I shall gallop away from it,” said Bart laughing, “for I am afraid of fighting.”

Two hours later, Black Boy, already saddled and bridled, a good blanket rolled up on his saddle-bow, and a bag of meal and some dried bison-flesh attached to his pad behind, was led down the rugged way to the gate, which had been opened out ready. Joses and the Indians were on either side ready with their rifles as the lad mounted in the outer darkness and silence; a few farewell words were uttered, and he made his plans as to the direction in which he meant to ride, which was pretty close in to the side of the mountain for about a quarter of a mile, and then away at right angles for the end of the lake.

“Good-bye, my boy, and God be with you,” whispered the Doctor, pressing one hand.

“Take care of yourself, dear lad,” whispered Joses, pressing the other, and then giving way to the chief, who bent forward, saying, in his low, grave voice—

“The Beaver-with-Sharp-Teeth would like to ride beside the brave young chief, but the Great Spirit says it must not be. Go; you can laugh at the Apaché dogs.”

Bart could not answer, but pressed his steed’s sides, and the brave little animal would have gone off through the intense darkness at a gallop; but this was not what Bart wished, and checking him, Black Boy ambled over the soft ground, avoiding the rocks and tall prickly cacti with wonderful skill, while Bart sat there, his ears attent and nostrils distended, listening for the slightest sound of danger, as the Indians might be swarming round him for aught he knew; and as he thought it possible that one of the dismounted bodies might be creeping up towards the gateway close beneath the rocks, he found himself hoping that the party had gone in and were blocking up the entrance well with stones.

The darkness was terrible, and still there was a strange lurid aspect above him, showing dimly the edge of the top of the mountain. That there was going to be a storm he felt sure—everything was so still, the heat was so great, and the strange oppression of the air foretold its coming; but he hoped to be far on his way and beyond the Indians ere it came, for the flashes of lightning might betray him to the watchful eyes of the enemy, and then he knew it meant a ride for life, as it would not take the Apachés long to mount.

All at once, as he was riding cautiously along, his rifle slung behind him, and his head bent forward to peer into the darkness, there was a sharp flash, and what seemed to be a great star of fire struck the rock, shedding a brilliant light which revealed all around for a short distance, as if a light had suddenly appeared from an opening in the mountain; and then, close in beneath where the electric bolt had struck, he could see a knot of about a dozen Indians, who uttered a tremendous yell as they caught sight of him, making Black Boy tear off at full speed, while the next moment there was a deafening crash, and it seemed to Bart that a huge mass of the mountain-side had fallen crumbling down.

That one flash which struck the mountain seemed as if it had been the signal for the elements to commence their strife, for directly after the heavens were in a blaze. Forked lightning darted here and there; the dense clouds opened and shut, as if to reveal the wondrously vivid glories beyond, and the thunder kept up a series of deafening peals that nearly drove the little steed frantic.