We however entered on the glacier with confidence in the skill and prudence of our guides; several of whom being hunters, and accustomed to chase the chamois over such places, were acquainted with all the precautions, that it was necessary to take for our safety. To avoid the danger of falling into the crevices, especially those masked by the snow, we connected ourselves, three persons together, at the distance of 10 or 12 feet apart, by a cord round the body: so that in case of one of the three falling into a chasm, the other two could at least support him, until assistance could be procured from the rest of the party. Each person was provided with a pole, 6 feet long, and pointed at the bottom with iron, which we found to be a necessary article. Where the crevices were not more than two or three feet broad, we leaped over them with the assistance of our staff; others we passed on natural bridges of snow, that threatened every moment to sink with us into the abyss, and over others, we made a bridge of the ladder, which was extremely slight, as otherwise it would have been impossible for a man to carry it up the steeps we had ascended. Without its assistance, we could not have passed the glacier. Over this slender support we crawled with caution, suspended over a chasm, into which we could see to an immense depth; but of which in no instance could we see the bottom. We were sometimes forced to pass on a narrow ridge of treacherous ice, not more than a foot in breadth, with one of these terrific chasms on either side. The firm step, with which we saw our guides pass these difficulties, inspired us with confidence: but I cannot even now think of some of the situations we were placed in, without a feeling of dread; and especially when in bed, and in the silence of the night, they present themselves to my imagination, I involuntarily shrink with horror at the idea, and am astonished in recollecting what little sensation I felt at the moment. We threw down into some of the narrow cracks, pieces of ice and fragments of rock, and heard for a considerable time, the more and more distant sound, as they bounded from side to side. In no instance could we perceive the stone strike the bottom; but the sound, instead of ceasing suddenly, as would then have been the case, grew fainter and fainter, until it was too feeble to be heard. What then must be the immense depth of these openings, when in these silent regions, the noise of a large stone striking the bottom is too distant to be heard at the orifice!