part of it," interrupted the other. "It's the cry. There, Mukoki has his pack ready. Let's start for the chasm at once!"
This time the boys had a heavier burden than usual, for in the canoe they placed one of the two loads carried by Mukoki, and consequently their progress toward the chasm was much slower than that across the plain. It was late in the afternoon when they reached the break that led into the chasm, and as they cautiously made the descent now Rod thought of the thrilling pursuit of the Woonga horde, and how a few weeks before they had discovered this break just in time for Wabi and him to save their lives, and that of the wounded Mukoki. It was with a feeling almost of awe that the three adventurers penetrated deeper and deeper into the silent gloom of this mystery-filled gulch between the mountains, and when they reached the bottom they set their loads down without speaking, their eyes roving over the black walls of rock, their hearts throbbing a little faster with excitement.
For here, at this break in the mountain, began the romantic trail drawn by men long dead, the trail that led to a treasure of gold.
As the three sat in silence, the gloom in the chasm thickened. The sun had passed beyond the southwestern forests, and through the narrow rift between the mountain walls there fell but the ebbing light of day, dissolving itself into the shadows of dusk as it struggled weakly in the cavernous depths. For a few minutes this swift fading of day into night gripped the adventurers in its spell. What did the lonely solitudes of that chasm hold for them? Where would they lead them? To Rod's mind there came a picture of the silver fox and a thought of his dream, when for a few miles he had explored the mysteries of this strange, sunless world shut in by rock walls. Again he saw the dancing skeletons, heard the rattle of their bones, and watched the wonderful dream-battle that had led him to the birch-bark map. Wabigoon, his eyes gleaming in the gathering darkness, thought of their flight from the outlaw savages, and Mukoki—
The white youth had turned a little to look at the old warrior. Mukoki sat as rigid as a pillar of stone an arm's reach from him. Head erect, arms tense, his eyes gleaming strangely, he stared straight out into the gloom between the chasm walls. Rod shivered. He knew, knew without questioning, that Mukoki was thinking of the cry!
And at that instant there floated up from the black chaos ahead a sound, a sound low and weird, like the moaning of a winter's wind through the pine tops, swelling, advancing, until it ended in a shriek—a shriek that echoed and reëchoed between the chasm walls, dying away in a wail that froze the blood of the three who sat and listened!
CHAPTER XII
WABI MAKES A STRANGE DISCOVERY
Mukoki broke the silence which followed the terrible cry. With a choking sound, as if some unseen hand were clutching at his throat, he slipped from the rock upon which he was sitting and crouched behind it, his rifle gleaming faintly as he leveled it down the chasm. There came the warning click of Wabigoon's gun, and the young Indian hunched himself forward until he was no more than an indistinct shadow in the fast-deepening gloom of night. Only Rod still sat erect. For a moment his heart seemed to stand still. Then something leaped into his brain and spread like fire through his veins, calling him to his feet, trembling with the knowledge of what that cry had told him! It was not a lesson from the wilderness that Roderick Drew was learning now. As fast as the mind could travel he had gone far back into the strife and misery and madness of civilization, and there he found the language of that fearful cry floating up the chasm. He had heard it once, twice—yes, again and again, and the memory of it had burned deep down into his soul. He turned to his companions, trying to speak, but the horror that had first filled Mukoki now fastened itself on him, and his tongue was lifeless.
"A madman!"
Wabi's fingers dug into his arm like the claws of a bear.
"A what!"
"A madman!" repeated Rod, trying to speak more calmly. "The man who shot the bear and fired at Mukoki and who uses gold bullets in his gun is mad—raving mad! I have heard those screams before—in the Eloise insane asylum, near Detroit. He's—"
The words were frozen on his lips. Again the cry echoed up the chasm. It was nearer this time, and with a sobbing, terrified sound, something that Wabi had never heard fall from Mukoki's lips before, the old warrior clung to Roderick's arm. Darkness hid the terror in his face, but the white boy could feel it in the grip of his hands.
"Mad, raving mad!" he cried. Suddenly he gripped Mukoki fiercely by the shoulders, and as Wabigoon crouched forward, ready to fire at the first movement in the gloom, he thrust the butt of his rifle in his back. "Don't shoot!" he commanded. "Mukoki, don't be a fool! That's a man back there, a man who has suffered and starved, starved, mind you!—until he's mad, stark mad! It would be worse than murder to kill him!"
He stopped, and Mukoki drew back a step, breathing deeply.
"Heem—starve—no eat—gone bad dog?" he questioned softly. In an instant Wabi was at his side.
"That's it, Muky—he's gone bad dog, just like that husky of ours who went bad because he swallowed a fish bone. White men sometimes go bad dog when they are thirsty and starving!"
"Our Great Spirit tells us that we must never harm them," added Rod. "We put them in big houses, larger than all of the houses at the Post together, and feed them and clothe them and care for them all their lives. Are you afraid of a bad dog, Muky, or of a man who has gone bad dog?"
"Bad dog bite deep—mebby so we kill heem!"
"But we don't kill them until we have to," persisted the quick-witted Wabigoon, who saw the way in which Rod's efforts were being directed. "Didn't we save our husky by taking the fish bone out of his throat? We must save this bad dog, because he is a white man, like Rod. He thinks all men are his enemies, just as a bad dog thinks all other dogs are his enemies. So we must be careful and not give him a chance to shoot us but we mustn't harm him!"
"It will be best if we don't let him know we are in the chasm," said Rod, still speaking for Mukoki's benefit. "He's probably going out on the plain, and must climb up this break in, the mountain. Let's move our stuff a little out of his path."
As the two boys went to the canoe their hands touched. Wabi was startled by the coldness of his friend's fingers.
"We've fixed Mukoki," he whispered. "He won't shoot. But—"
"We may have to," replied Rod. "That will be up to you and me, Wabi. We must use judgment, and unless it's a case of life or death—"
"Ugh!" shuddered the young Indian.
"If he doesn't discover our presence to-night we will get out of his way to-morrow," continued Rod. "No fire—no talking. We must be as still as death!"
For some time after their outfit was concealed among the rocks Wabigoon sat with his mouth close to the old pathfinder's ear. Then he returned to Rod.
"Muky understands. He has never seen or heard of a madman, and it is hard for him to comprehend. But he knows—now, and understands what he must do."
"Sh-h-h-h-h!"
"What is it?"
"I thought I heard a sound!" breathed Rod. "Did you hear it?"
"No."
The two listened. There was an awesome silence in the chasm now, broken only
