Progress, of course, was slow. Every yard of the way was difficult, every second yard hazardous. As an alpenstock, the spear was invaluable. But for its aid he would have slipped and fallen a dozen times on that treacherous mountainside. After a couple of miles of fairly straight going, he was faced by the need of crossing to another range. Choosing a line which seemed practicable, he climbed down a broken rock face, plunged into the medley of fallen logs which cumbered the nearer slope of the intervening canyon, and ferried a torrent by the precarious bridge of a rotting pine, the only one, among hundreds which had fallen, long enough to reach the opposite bank, and so slender and brittle at its apex that it crumbled beneath him just as he sprang to safety on a rock slippery with spray. The climb to the open again was exhausting work. Once he thought he was done for when an apparently sound log snapped suddenly, and plunged him into a dark and fearsome network of dead wood, so swathed in soft and noisome fungus growths that he seemed to be unable to find sure hold for either hand or foot. Somehow, he clambered into daylight again, and found himself clinging to the roots of a tree which throve on the tangled husks of its ancestors. It took him three hours to reach a height of five hundred feet, at which point the treacherous forest belt yielded to a firmer area covered by alpine moss. Then, utterly worn out, and unequal to further effort that day, he was thinking of gnawing some bulbs of resin which had exuded from the bigger firs, when he caught sight of a small armadillo scuttling over the rocks. It was the first living creature, save for an occasional vulture, he had seen since leaving the snow-line. The discovery brought a spurious energy, and he dashed off in pursuit. The armadillo, which was far removed from its natural habitat--probably owing to the drought in the lowlands--ran very rapidly, and was evidently making for a burrow. Indeed, Power despaired of securing the creature when it headed for a fissure in the ground. As a last resource, he hurled the spear at it. The weapon turned in the air, fell vertically, and buried its broad blade in the animal's neck, striking the only vulnerable part of its body, since the whole remaining structure was covered with a strong, bony case of flexible plates.