Another half-hour brings us to the brow of a second precipice, which is scooped out along its centre so as to cause the brow to overhang. Chagrin was in Bennen's face: he turned his eyes upwards, and I feared mortally that he was about to propose a reascent to the _arête_. It was very questionable whether our muscles could have responded to such a demand. While we stood pondering here, a deep and confused roar attracted our attention. From a point near the summit of the Weisshorn, a rock had been discharged down a dry couloir, raising a cloud of dust at each bump against the mountain. A hundred similar ones were immediately in motion, while the spaces between the larger masses were filled by an innumerable flight of smaller stones. Each of them shook its quantum of dust in the air, until finally the avalanche was enveloped in a cloud. The clatter was stunning, for the collisions were incessant. Black masses of rock emerged here and there from the cloud, and sped through the air like flying fiends. Their motion was not one of translation merely, but they whizzed and vibrated in their flight as if urged by wings. The echoes resounded from side to side, from the Schallenberg to the Weisshorn and back, until finally, after many a deep-sounding thud in the snow, the whole troop came to rest at the bottom of the mountain. This stone avalanche was one of the most extraordinary things I had ever witnessed, and in connection with it I would draw the attention of future climbers of the Weisshorn to the danger which would infallibly beset any attempt to ascend it from this side, except by one of its _arêtes_. At any moment the mountain-side may be raked by a fire as deadly as that of cannon.
After due deliberation we moved along the precipice westward, I fearing that each step forward but plunged us into deeper difficulty. At one place, however, the precipice bevelled off to a steep incline of smooth rock, along which ran a crack, wide enough to admit the fingers, and sloping obliquely down to the lower glacier. Each in succession gripped the rock and shifted his body sideways along the crack until he came near enough to the glacier to reach it by a rough glissade. We passed swiftly along the glacier, sometimes running, and, on steeper slopes, sliding, until we were pulled up for the third time by a precipice which seemed even worse than either of the others. It was quite sheer, and as far as I could see right or left altogether hopeless. To my surprise, both the men turned without hesitation to the right. I felt desperately blank, but I could notice no expression of dismay in the countenance of either of my companions. They inspected the moraine matter over which we walked, and at length one of them exclaimed, 'Da sind die Spuren,' lengthening his strides at the same moment. We looked over the brink at intervals, and at length discovered what appeared to be a mere streak of clay on the face of the precipice. On this streak we found footing. It was by no means easy, but to hard-pushed men it was a deliverance. The streak vanished, and we must get down the rock. This fortunately was rough, so that by pressing the hands against its rounded protuberances, and sticking the boot-nails against its projecting crystals, we let ourselves gradually down. A deep cleft separated the glacier from the precipice; this was crossed, and we were free, being clearly placed beyond the last bastion of the mountain.
