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of the waters which arise from the partial melting of the eternal snows. They drag with them from the regions whence they derive their origin, all the ruins of the mountain, enormous rocks, and immense accumulations of sand and stones. These are driven onwards by the irresistible stream of solid ice; and when they arrive at a declivity of the mountain, sufficiently rapid, roll down, scattering ruin. I saw one of these rocks which had descended in the spring, (winter here is the season of silence and safety) which measured forty feet in every direction.
The verge of a glacier, like that of Boisson, presents the most vivid image of desolation that it is possible to con-
