I could not do it. If I got my feet on the rock the effort would bring me too far into the water, and that meant destruction. I saw this clearly in a second while my wrists were cracking with the strain. But if I had a wall behind me I could reach back with one hand and get what we call in Scotland a “stelf.” I knew there was a wall, but how far I could not judge. The perpetual hammering of the stream had confused my wits. It was a horrible moment, but I had to risk it. I knew that if the wall was too far back I should fall, for I had to let my weight go till my hand fell on it. Delay would do no good, so with a prayer I flung my right hand back, while my left hand clutched the spike. I found the wall—it was only a foot or two beyond my reach. With a heave I had my foot on the spike, and turning, had both hands on the opposite wall. There I stood, straddling like a Colossus over a waste of white waters, with the cave floor far below me in the gloom, and my discarded axe lying close to a splash of Laputa’s blood. The spectacle made me giddy, and I had to move on or fall. The wall was not quite perpendicular, but as far as I could see a slope of about sixty degrees. It was ribbed and terraced pretty fully, but I could see no ledge within reach which offered standing room. Once more I tried the moral support of the rope, and as well as I could dropped a noose on the spike which might hold me if I fell. Then I boldly embarked on a hand traverse, pulling myself along a little ledge till I was right in the angle of the fall. Here, happily, the water was shallower and less violent, and with my legs up to the knees in foam I managed to scramble into a kind of corner. Now at last I was on the wall of the gully, and above the cave. I had achieved by amazing luck one of the most difficult of all mountaineering operations. I had got out of a cave to the wall above. My troubles were by no means over, for I found the cliff most difficult to climb. The great rush of the stream dizzied my brain, the spray made the rock damp, and the slope steepened as I advanced. At one overhang my shoulder was almost in the water again. All this time I was climbing doggedly, with terror somewhere in my soul, and hope lighting but a feeble lamp. I was very distrustful of my body, for I knew that at any moment my weakness might return. The fever of three days of peril and stress is not allayed by one night’s rest. By this time I was high enough to see that the river came out of the ground about fifty feet short of the lip of the gully, and some ten feet beyond where I stood. Above the hole whence the waters issued was a loose slope of slabs and screes. It looked an ugly place, but there I must go, for the rock-wall I was on was getting unclimbable.