His voice trembled, his face was white. From his crouching posture Wabi looked up at him, and they spoke no more words.

Mukoki looked, and was silent. Then he went back to his dredging.

Little by little Rod washed down his pan. Half an hour later he showed it again to Wabigoon. The pebbles were gone. What sand was left was heavy with the gleaming particles, and half buried in it all was the yellow nugget! In Wabi's pan there was no nugget but it was rich with the gleam of fine gold.

Mukoki had dredged a bushel of sand and gravel from the pool, and was upon his knees beside the heap which he had piled on the rock. When Rod went to that rock for his third pan of dirt the old warrior made no sign that he had discovered anything. The early gloom of afternoon was beginning to settle between the chasm walls, and at the end of his fourth pan Rod found that it was becoming so dark that he could no longer distinguish the yellow particles in the sand. With the exception of one nugget he had found only fine gold. With Wabi's dust were three small nuggets.

When they ceased work Mukoki rose from beside the rock, chuckling, grimacing, and holding out his hand. Wabi was the first to see, and his cry of astonishment drew Rod quickly to his side. The hollow of the old warrior's hand was filled with nuggets! He turned them into Wabigoon's hand, and the young Indian turned them into Rod's, and as he felt the weight of the treasure he held Rod could no longer restrain the yell of exultation that had been held in all that afternoon. Jumping high into the air and whooping at every other step he raced to the camp and soon had the small scale which they had brought with them from Wabinosh House. The nuggets they had found that afternoon weighed full seven ounces, and the fine gold, after allowing the deduction of a third for sand, weighed a little more than eleven ounces.

"Eighteen ounces--and a quarter!"

Rod gave the total in a voice tremulous with incredulity.

"Eighteen ounces--at twenty dollars an ounce--three hundred and sixty dollars!" he figured rapidly. "By George--" The prospect seemed too big for him, and he stopped.

"Less than half a day's work," added Wabi. "We're doing better than John Ball and the Frenchmen. It means eighteen thousand dollars a month!"

"And by autumn--" began Rod.

He was interrupted by the inimitable chuckling laugh of Mukoki and found the old warrior's face a map of creases and grimaces.

"In twent' t'ous'nd moon--mak' heem how much?" he questioned.

In all his life Wabigoon had never heard Mukoki joke before, and with a wild whoop of joy he rolled the stoical old pathfinder off the rock on which he was sitting, and Rod joined heartily in Wabi's merriment.

And Mukoki's question proved not to be so much of a joke after all, as the boys were soon to learn. For several days the work went on uninterrupted. The buckskin bags in the balsam shelter grew heavier and heavier. Each succeeding hour added to the visions of the gold seekers. On the fifth day Rod found seventeen nuggets among his fine gold, one of them as large as the end of his thumb. On the seventh came the richest of all their panning, but on the ninth a startling thing happened. Mukoki was compelled to work ceaselessly to keep the two boys supplied with "pay dirt" from the pool. His improvised dredge now brought up only a handful or two of sand and pebbles at a dip. It was on this ninth day that the truth dawned upon them all.

The pool was becoming exhausted of its treasure!

But the discovery brought no great gloom with it. Somewhere near that pool must be the very source of the treasure itself, and the gold hunters were confident of finding it. Besides, they had already acc.u.mulated what to them was a considerable fortune, at least two thousand dollars apiece. For three more days the work continued, and then Mukoki's dredge no longer brought up pebbles or sand from the bottom of the pool.

The last pan was washed early in the morning, and as the warm weather had begun to taint the caribou meat Mukoki and Wabigoon left immediately after dinner to secure fresh meat out on the plains, while Rod remained in camp. The strange thick gloom of night which began to gather in the chasm before the sun had disappeared beyond the plains above was already descending upon him when Rod began preparations for supper. He knew that the Indians would not wait until dark before reentering the break between the mountains, and confident that they would soon appear he began mixing up flour and water for their usual batch of hot-stone biscuits. So intent was he upon his task that he did not see a shadowy form creeping up foot by foot from the rocks. He caught no glimpse of the eyes that glared like smoldering coals from out of the half darkness between him and the fall.

His first knowledge of another presence came in a low, whining cry, a cry that was not much more than a whisper, and he leaped to his feet, every nerve in his body once more tingling with that excitement which had possessed him when he stood under the rock talking to the madman.

A dozen yards away he saw a face, a great, white, ghost-like face, staring at him from out of the thickening shadows, and under that face and its tangled veil of beard and hair he saw the crouching form of the mad hunter!

In that moment Roderick Drew thanked G.o.d that he was not afraid.

Standing full in the glow of the fire he stretched out his arms, as he had once before reached them out to this weird creature, and again, softly, pleadingly, he called the name of John Ball! There came in reply a faint, almost unheard sound from the wild man, a sound that was repeated again and again, and which sent a thrill into the young hunter, for it was wondrously like the name he was calling: "John Ball! John Ball! John Ball!" And as the mad hunter repeated that sound he advanced, foot by foot, as though creeping upon all fours, and Rod saw then that one of his arms was stretched out to him, and that in the extended hand was a fish.

He advanced a step, reaching out his own hands eagerly, and the wild creature stopped, cringing as if fearing a blow.

"John Ball! John Ball!" he repeated. He thought of no other words but those, and advanced bit by bit as he called them gently again and again. Now he was within ten feet of the old man, now eight, presently he was so near that he might have reached him in a single leap. Then he stopped.

The mad hunter laid down his fish. Slowly he retreated, murmuring incoherent sounds in his beard, then sprang to his feet and with a wailing cry sped back toward the pool. Swiftly Rod followed. He saw the form leap from the rocks at its edge, heard a heavy splash, and all was still!

For many minutes Rod stood with the spray of the cataract dashing in his face. This time the madman's plunge into the cold depths at his feet filled him with none of the horror of that first insane leap from the rock above. Somewhere in that pool the old man was seeking refuge!

What did it mean? His eyes scanned the thin sheet of water that plunged down from the upper chasm. It was a dozen feet in width and hid the black wall of rock behind it like a thick veil. What was there just behind that falling torrent? Was it possible that in the wall of rock behind the waterfall there was a place where John Ball found concealment?

Rod returned to camp, convinced that he had at last guessed a solution to the mystery. John Ball was behind the cataract! The strange murmurings of the old man who for a few moments had crouched so close to him still rang in his ears, and he was sure that in these half-articulate sounds had been John Ball's own name. If there had been a doubt in his mind before, it was wiped away now. The mad hunter was John Ball, and with that thought burning in his brain Rod stopped beside the fish--the madman's offering of peace--and turned his face once more back toward the black loneliness of the pool.

Unconsciously a sobbing cry of sympathy fell softly from Rod's lips, and he called John Ball's name again, louder and louder, until it echoed far down the gloomy depths of the chasm. There came no response. Then he turned to the fish. John Ball wished them to be friends, and he had brought this offering! In the firelight Rod saw that it was a curious looking, dark-colored fish, covered with small scales that were almost black. It was the size of a large trout, and yet it was not a trout. The head was thick and heavy, like a sucker's, and yet it was not a sucker. He looked at this head more closely, and gave a sudden start when he saw that it had no eyes!

In one great flood the truth swept upon him, the truth of what lay behind the cataract, of where John Ball had gone! For he held in his hands an eyeless creature of another world, a world hidden in the bowels of the earth itself, a proof that beyond the fall was a great cavern filled with the mystery and the sightless things of eternal night, and that in this cavern John Ball found his food and made his home!

CHAPTER XVII

IN A SUBTERRANEAN WORLD

When Mukoki and Wabigoon returned half an hour later the hot-stone biscuits were still unbaked. The fire was only a bed of coals. Beside it sat Rod, the strange fish upon the ground at his feet. Before Mukoki had thrown down the pack of meat which he was carrying he was showing them this fish. Quickly he related what had happened. He added to this some of the things which he had thought while sitting by the fire. The chief of these things were that just behind the cataract was the entrance to a great cavern, and that in this cavern they would not only find John Ball, but also the rich storehouse of that treasure of which they, had discovered a part in the pool.

And as the night lengthened there was little talk about the gold and much about John Ball. Again and again Rod described the madman's visit, the trembling, pleading voice, the offering of the fish, the eager glow that had come into the wild eyes when he talked to him and called him by name. Even Mukoki's stoic heart was struck by the deep pathos of it all. The mad hunter no longer carried his gun. He no longer sought their lives. In his crazed brain something new and wonderful was at work, something that drew him to them, with the half-fear of an animal, and yet with growing trust. He was pleading for their companionship, their friendship, and deep down in his heart Rod felt that the spark of sanity was not completely gone from John Ball.

When the three adventurers retired to their blankets in the cedar shelter it was not the thought of gold that quickened their blood in antic.i.p.ation of the morning. The pa.s.sing of an age would not dull the l.u.s.ter of what they had come to seek. It would wait for them. The greatest of all things--the sympathy of man for man--had stilled that other pa.s.sion in them. John Ball's salvation, and not more gold, was the day's work ahead of them now.

With the dawn they were up, and by the time it was light enough to see they were ready for the exploration of whatever was hidden behind the fall. In a rubber blanket Wabigoon wrapped a rifle and half a dozen pine torches. Mukoki carried a quant.i.ty of cooked meat. Standing on the edge of the pool Rod pointed into the falling torrent.

"He dived straight under," he said. "The opening to the cavern is directly behind the shoot of falling water."

Wabi placed his hat and coat upon a rock.

"I'll try it first. Wait until I come back," he said.

Without another word he plunged into the pool. Minute after minute pa.s.sed, and he did not reappear. Rod was conscious of a nervous chill creeping into his blood. But Mukoki was chuckling confidently.

"Found heem!" he replied in response to the white youth's inquiring look.

As he spoke Wabigoon came up out of the pool like a great fish. Rod helped him upon the rocks.

"We're two bright ones, we are, Muky!" he exclaimed, as soon as he gained his breath. "Just behind the fall I ran up against the wall of rock we found when we were hunting for John Ball, stood on my feet, and--" he swung his arms suggestively--"there I was, head and shoulders out of water, looking into a hole as big as a house!"

"Dive easy!" warned the old pathfinder, turning to Rod. "b.u.mp head on rock--swush!"

"We won't have to dive," continued Wabi. "The water directly under the fall of the stream isn't more than four feet deep. If we wade into it from over there we can make it easy."

Taking his waterproof bundle the young Indian slipped into the pool close up against the wall of rock that formed the foundation of the upper chasm and plunged straight into the tumbling cataract. Mukoki followed close behind and preparing himself with a long breath Rod hurried into this new experience. For a moment he was conscious of a smothering weight upon him and a thunderous roaring in his ears, and he was borne irresistibly down. There was still air in his lungs when he found himself safely through the deluge so he knew that its pa.s.sage had taken him only a brief but thrilling instant. For a time he could see nothing. Then he made out a dark form drawing itself up out of the water. Beyond that there lay a chaos of midnight blackness, and he knew that his eyes were staring into the depths of a great cavern!

Gripping the edge of the rock ledge he dragged himself up as both Wabigoon and Mukoki had done, and found his feet upon a soft floor of sand. Suddenly he felt a hand clutch his arm. A half-shout, rising faintly above the wash of the cataract, sounded in his ear.

"Look!"

He wiped the water from his eyes and gazed ahead of him. For a moment he saw nothing. Then, so faintly that at first it appeared no larger than a star, he caught the faint glimmer of a light. As he looked it became more and more distinct, and to his astonishment he saw that it was slowly rising, like a huge will-o'-the-wisp that had suddenly risen from the floor of the cavern to float off into the utter blackness of s.p.a.ce above. And even as he stared, gripping Wabi's arm in his excitement, the strange light began to descend, and quickly disappeared!

The two boys saw Mukoki slip off into the gloom, and without questioning his motive they followed close behind. As they progressed the sound of the fall came more and more faintly to their ears. A blackness deeper than the gloom of the darkest night environed them, and the three now held to one another's arms. Rod understood why his companions lighted no torches. Somewhere ahead of them was another light, carried by the mad hunter. His blood thrilled with excitement.

Where would John Ball lead them?

Suddenly he became conscious that they were no longer walking on a level floor of sand but that they were ascending, as the light had done. Mukoki stopped and for a full minute they stood and listened.