Page:Whymper - Scrambles amongst the Alps.djvu/342

288 The fact that the mountain is composed of a series of stratified beds was pointed out long ago. De Saussure remarked it, and recorded explicitly, in his Travels (§ 2243), that they "rose to the north-east at an angle of about 45°." Forbes noticed it also; but gave it as his opinion that the beds were "less inclined, or nearly horizontal." He added, "De Saussure is no doubt correct." The truth, I think, lies between the two.

I was acquainted with both of the above-quoted passages, but did not turn the knowledge to any practical account until I re-observed the same fact for myself. It was not until after my repulse in 1863, that I referred the peculiar difficulties of the south-west ridge to the dip of the strata; but when once persuaded that structure and not texture was the real impediment, it was reasonable to infer that the opposite side, that is to say the eastern face, might be comparatively easy. In brief, that an arrangement should be found like Fig. 2, instead of like Fig. 1. This trivial deduction was the key to the ascent of the Matterhorn.

The point was, Did the strata continue with a similar dip throughout the mountain? If they did, then this great eastern face, instead of being hopelessly impracticable, should be quite the reverse. In fact, it should be a great natural staircase, with steps inclining inwards; and, if it were so, its smooth aspect might be of no account, for the smallest steps, inclined in this fashion, would afford good footing.

They did so, as far as one could judge from a distance. When snow fell in the summer time, it brought out long terraced lines upon the mountain; rudely parallel to each other; inclined in the direction shown (approximately) upon the figures in the accompanying plate: and the eastern face, on those occasions, was often whitened almost completely over; while the other sides, with the