Passage Of The Bossons Glacier.
You advance slowly, passing round the crevasses, or on the snow bridges of dubious strength. Then the rope plays its part. It is stretched out over these dangerous transits; if the snow bridge yields, the guide or traveller remains hanging over the abyss. He is drawn beyond it, and gets off with a few bruises. Sometimes, if the crevasse is very wide but not deep, he descends to the bottom and goes up on the other side. In this case it is necessary to cut steps in the ice, and the two leading guides, armed with a sort of hatchet, perform this difficult and perilous task. A special circumstance makes the entrance on the Bossons dangerous. You go upon the glacier at the base of the Aiguille-du-Midi, opposite a passage whence stone avalanches often descend. This passage is nearly six hundred feet wide. It must be crossed quickly, and as you pass, a guide stands on guard to avert the danger from you if it presents itself. In 1869 a guide was killed on this spot, and his body, hurled into space by a stone, was dashed to pieces on the rocks nine hundred feet below.
Crevasse and Bridge.
We were warned, and hastened our steps as fast as our inexperience would permit; but on leaving this dangerous zone, another, not less dangerous, awaited us. This was the region of the “seracs,”—immense blocks of ice, the formation of which is not as yet explained.
