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 which distance is performed on mules, not so sure footed, but that on the first day the one which I rode fell in what the guides call a mauvais pas, so that I narrowly escaped being precipitated down the mountain. We passed over a hollow covered with snow, down which vast stones are accustomed to roll. One had fallen the preceding day, a little time after we had returned: our guides desired us to pass quickly, for it is said that sometimes the least sound will accelerate their descent. We arrived at Montanvert, however, safe.

On all sides precipitous mountains, the abodes of unrelenting frost, surround this vale: their sides are banked up with ice and snow, broken, heaped high, and exhibiting terrific chasms. The summits are sharp and naked pinnacles, whose overhanging steepness will not even permit snow to rest upon them. Lines of dazzling ice occupy here and there their perpendicular rifts, and shine through the driving vapours with inexpressible brilliance: they pierce the clouds like things not belonging to this earth. The vale itself is filled with a mass of undulating ice, and has an ascent sufficiently gradual even to the remotest abysses of these horrible deserts. It is only half a league (about two miles) in breadth, and seems much less. It exhibits an appearance as if frost had suddenly bound up the waves and whirlpools of a mighty torrent. We walked some distance upon its surface. The waves are elevated about 12 or 15 feet from the surface of the mass, which is intersected by long gaps of unfathomable depth, the ice of whose sides is more beautifully azure than the sky. In these regions everything changes, and is in motion. This vast mass of ice has one general progress, which ceases neither day nor night; it breaks and bursts for ever: some undulations sink while others rise; it is never the same. The echo of rocks, or of the ice and snow which fall from their overhanging precipices, or roll from their aerial summits,