Thus estimating the extent of his danger by the measure of sound sense and reality, and supported by some degree of practice in such exercise, the brave youth went forward on his awful journey, step by step, winning his way with a caution and fortitude and presence of mind which alone could have saved him from instant destruction. At length he gained a point where a projecting rock formed the angle of the precipice, so far as it had been visible to him from the platform. This, therefore, was the critical point of his undertaking; but it was also the most perilous part of it. The rock projected more than six feet forward over the torrent, which he heard raging at the depth of a hundred yards beneath, with a noise like subterranean thunder. He examined the spot with the utmost care, and was led, by the existence of shrubs, grass, and even stunted trees, to believe that this rock marked the farthest extent of the slip or slide of earth, and that, could he but turn round the angle of which it was the termination, he might hope to attain the continuation of the path which had been so strangely interrupted by this convulsion of nature. But the crag jutted out so much as to afford no possibility of passing either under or around it; and as it rose several feet above the position which Arthur had attained, it was no easy matter to climb over it. This was, however, the course which he chose, as the only mode of surmounting what he hoped might prove the last obstacle to his voyage of discovery. A projecting tree afforded him the means of raising and swinging himself up to the top of the crag. But he had scarcely planted himself on it, had scarcely a moment to congratulate himself, on seeing, amid a wild chaos of cliffs and wood, the gloomy ruins of Geierstein, with smoke arising, and indicating something like a human habitation beside them, when, to his extreme terror, he felt the huge cliff on which he stood tremble, stoop slowly forward, and gradually sink from its position. Projecting as it was, and shaken as its equilibrium had been by the recent earthquake, it lay now so insecurely poised, that its balance was entirely destroyed, even by the addition of the young man's weight.