“Come,” David shouted to Miguel, who was close at his heels. “I want to see the falls and--and--what’s under them.” Miguel did not understand the meaning of the words but when they were abreast of the curtain of water he saw the facts at a glance. The falling body of crystal liquid did not, of course, hug closely the stone wall over which it rushed. The momentum of the water was so great that it carried it clear of the ledge a distance of several feet. It was just as David had expected, provided---- He crawled close to the edge of the fall and then gave a shout that Miguel heard even above the rumble that was all but deafening. At the base of any cataract one may find either of two things: a deep pool of whirling water or a mass of shattered rock fragments that has broken off the ledge above and lodged against the base of the wall. The latter is what David hoped to find and it is what he found. A ridge of splintered rock stretched from the edge of the water into the mist so far under the fall as they could see. If it continued, unbroken, to the other side, it would afford a means of crossing the stream. David ventured gingerly onto the jagged pathway. The stones were cold and wet and he had to crawl on hands and knees as there was not headroom to stand. So soon as he was well under way Miguel followed. It was a terrifying experience, justified only by a desperate situation. The sheet of clear water, streaked with green, shot over the crouching men with a thunderous roar, intensified by the cavity in which they found themselves. A cold mist saturated their ragged clothing and chilled them through; also, the vapor soon shut off their view in the direction from which they had come, enveloping them in a clammy fog that shut out the daylight. Swallows left their nests that had been plastered against the face of the wall and dashed away in the gloom with frightened twitters. Below, the water raged and boiled and tongues crested with foam leaped angrily toward the men as if trying to drag them into the cauldron below. Once David faltered; it seemed he could go no farther. But there was Miguel in back of him. He could not retreat and in so doing display a lack of courage before his companion. Hope for them lay in one direction only and that was straight ahead, even if at the same time it seemed to promise certain disaster. After what seemed like ages the gray twilight in front of them brightened and a strong wind fanned the face of the foremost man. The end of the perilous journey was in sight. And soon they had emerged from under the river and stood on the rocks that flanked the side, drenched, cold and shivering. “Thank heaven, we got through that all right,” David said between chattering teeth. “Do you think the Indians will follow?” “They would if they knew where we went. We have to keep out of sight,” Miguel replied. “But they wouldn’t come under the fall; they would go downstream and cross.”