And on they went, climbing a steep boulder-strewn slope above the pool till they came to the 'edge' itself, a tossed and broken battlement of stone, running along the top of the Scout. Here the great black slabs of grit were lying fantastically piled upon each other at every angle and in every possible combination. The path which leads from the Hayfield side across the desolate tableland of the Scout to the Snake Inn on the eastern side of the ridge, ran among them, and many a wayfarer, benighted or mist-bound on the moor, had taken refuge before now in their caverns and recesses, waiting for the light, and dreading to find himself on the cliffs of the Downfall. But David pushed on past many hiding-places well known to him, till the two reached the point where the mountain face sweeps backward in the curve of which the Downfall makes the centre. At the outward edge of the curve a great buttress of ragged and jutting rocks descends perpendicularly towards the valley, like a ruined staircase with displaced and gigantic steps. Down this David began to make his way, and Louie jumped, and slid, and swung after him, as lithe and sure-footed as a cat. Presently David stopped. 'This ull do,' he said, surveying the place with a critical eye. They had just slid down a sloping chimney of rock, and were now standing on a flat block, over which hung another like a penthouse roof. On the side of the Downfall there was a projecting stone, on which David stepped out to look about him. Holding on to a rock above for precaution's sake, he reconnoitred their position. To his left was the black and semicircular cliff, down the centre of which the Downfall stream, now tamed and thinned by the dry spring winds, was trickling. The course of the stream was marked by a vivid orange colour, produced, apparently, in the grit by the action of water; and about halfway down the fall a mass of rock had recently slipped, leaving a bright scar, through which one saw, as it were, the inner mass of the Peak, the rectangular blocks, now thick, now thin, as of some Cyclopean masonry, wherewith the earth-forces had built it up in days before a single alp had yet risen on the face of Europe. Below the boy's feet a precipice, which his projecting stone overhung, fell to the bed of the stream. On this side at least they were abundantly protected. On the moorside the steep broken ground of the hill came up to the rocky line they had been descending, and offered no difficulty to any sure-footed person. But no path ran anywhere near them, and from the path up above they were screened by the grit 'edge' already spoken of. Moreover, their penthouse, or half-gable, had towards the Downfall a tolerably wide opening; but towards the moor and the north there was but a narrow hole, which David soon saw could be stopped by a stone. When he crept back into their hiding-place, it pleased him extremely.