But a few seconds' consideration of this plan convinced Leicester of its utter impracticability. They had, by superhuman exertions, succeeded in climbing _up_ the precipice; but he knew that they could never get Walford safely _down_ again. There was nothing for it, then, but to go on, and _upward_, even though they should find their pursuers awaiting them at the top, a contingency which so much lost time rendered only too probable. Before going back, however, and attempting the passage up that awful slope, encumbered with Walford's helpless body, George thought it would be prudent to essay the passage alone, so that he might learn, from actual experience, the full extent of the danger, and thus be the better able to guard against disaster. Accordingly down he went upon hands and knees, and forthwith began the ascent. His first attempt proved to him that he had in no wise magnified the perils of the journey, for his knees slipped helplessly from under him the moment that they touched the grass, and it was only by clinging desperately with his hands to the long tough herbage that he escaped being shot down to the bottom and over the edge. Returning once more to the friendly ledge, which, after the dangers he had so recently passed through, seemed to afford a position of absolute safety, George began to cast about in his mind for some means of overcoming this new difficulty, and at last he hit upon the idea of making a narrow pathway up the slope by pulling up the grass by the roots. This, however, he soon found would be a work of considerable time; but he also discovered that it would be possible, without any great difficulty, to remove small patches of just sufficient size to give a precarious, but comparatively secure, foothold, and this he at once proceeded to do. Half an hour of arduous labour in this direction enabled him to safely reach the top of the slope, where, to his great gratification, he discovered another platform of rock, about six feet wide. Passing along this, he came suddenly upon an irregular fissure in the rocky face of the precipice. This fissure was about four feet wide at the bottom, the walls sloping inwards, like a roof, until they met at a height of seven or eight feet from the ground. George at once unhesitatingly entered the opening, and found that it widened somewhat as it receded from the face of the rock, until at a distance of some five and twenty feet inwards it abruptly terminated in a small, cave-like aperture, some six feet in height, and perhaps twelve in diameter, being, as nearly as he could ascertain, by the sense of touch only, roughly of a circular form.