Ainley looked ahead. Downstream the river narrowed and the low broad banks about them gradually rose, until they were like high ramparts on either hand. The Indian pointed towards the tree-crowned cliffs.

"No good there," he said. "We land here, and make grub; walk down and see what water like."

It seemed to Ainley the only sensible thing to do, and he did not demur. Accordingly, the Indian, seeing a favourable beach, turned the canoe inshore, and whilst his companion was preparing breakfast, the white man walked downstream towards the ramparts of rocks through which the river ran. When he reached them he looked down at the water. It ran smooth and glassy and swift, whirling against the rocky sides a good foot higher than between the earthen banks upstream. He followed the gorge, forgetting that he was tired, forgetting the preparing breakfast, a look of extreme anxiety upon his face. Three-quarters of an hour's walking brought him to the end of the gorge, and for a mile or two the country opened out once more, the river running wide between low-lying banks to disappear in the lee of a range of hills above which hung a veil of mist. He stood regarding the scene for a few minutes and then, the anxiety on his face more pronounced than ever, made his way back to the place where the Indian awaited him. The Indian had already eaten, and whilst he himself breakfasted he told him what he had seen. The native listened carefully, and in the end replied in his own language.

"Good! We go through the cliffs, in place of making the portage. It is the swifter way, and if the white Klootchman come this way, she has gone through these gates of the waters. We follow, but not very far, for again we come to the hills, and to a place where the earth is rent, and the waters fall down a wall that is higher than the highest spruce. If the Klootchman's canoe go there—it is the end."

Falls! So that was the meaning of that mist among the hills. There the river plunged into a chasm, and if Helen Yardely's canoe had been swept on in the current it was indeed the end. Ainley's anxiety mounted to positive fear. He pushed from him the fried deer-meat and bacon which the other had prepared for him, and rose suddenly to his feet.

"Let us be going!" he said sharply, and walked restlessly to and fro whilst his companion broke camp. A few minutes later they were afloat again, and after a little time there was no need to paddle. The current caught them and flung them towards the limestone gateway at express speed. In an amazingly short time they had passed through the gorge, and were watching the banks open out on either side of them.

There was no sign of life anywhere, no indication that any one had passed that way since time began. As they sped onward a peculiar throb and rumble began to make itself heard. It increased as they neared the range of hills towards which they were making, and as the banks began to grow rocky, and the water ahead broken by boulders, the Indian looked for a good place to land.

He found it on the lee side of a bluff where an eddy had scooped a little bay in the steep bank, and turning the canoe inside it, they stepped ashore. Making the canoe secure they climbed to the top of the bank and began to push their way down stream. The rapids, as Ainley noted, grew worse. Everywhere the rocks stood up like teeth tearing the water to tatters, and the rumble ahead grew more pronounced. Standing still for a moment, they felt the earth trembling beneath their feet, and the white man's face paled with apprehension. A tangle of spruce hid the view of the river as it skirted a big rock, and as the river evidently made a swerve at this point, they struck a bee-line through the timber. The rumble, of which they had long been conscious, of the suddenest seemed to become a roar, and, as they came to an open place where they could see the water again, they understood the reason.

The river but a few feet below them, bordered by shelving terraces of rock, suddenly disappeared. Rolling glassily for perhaps fifty yards, with scarce a ripple on its surface, the water seemed to gather itself together, and leap into a gorge, the bottom of which was ninety feet below. Ainley stood looking at the long cascade for a full minute, a wild light in his eyes, then he looked long and steadily at the gorge through which the river ran after its great leap. His face was white and grim, and his mouth was quivering painfully.

Then without a word he turned and began to hurry along the line of the gorge. The Indian strode after him.