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As we entered the valley of Chamouni (which in fact may be considered as a continuation of those which we have followed from Bonneville and Cluses) clouds hung upon the mountains at the distance perhaps of 6000 feet from the earth, but so as effectually to conceal not only Mont Blanc, but the other aiguilles, as they call them here, attached and subordinate to it. We were travelling along the valley, when suddenly we heard a sound as of the burst of smothered thunder rolling above; yet there was something earthly in the sound, that told us it could not be thunder. Our guide hastily pointed out to us a part of the mountain opposite, from whence the sound
