Sec. 22. Detailed accounts of the Rossberg Fall may be found in any ordinary Swiss Guide; the only points we have to notice respecting it are, that the mountain was composed of an indurated gravel, disposed in oblique beds sloping _towards_ the valley. A portion of one of these beds gave way, and half filled the valley beneath, burying five villages, together with the principal one of Goldau, and partially choking up a little lake, the streamlets which supplied it now forming irregular pools among the fallen fragments. I call the rock, and accurately, indurated gravel; but the induration is so complete that the mass breaks _through_ the rolled pebbles chiefly composing it, and may be considered as a true rock, only always in its blocks rugged and formless when compared with the crystalline formations. Turner has chosen his position on some of the higher heaps of ruin, looking down towards the Lake of Zug, which is seen under the sunset, the spire of the tower of Aart on its shore just relieved against the light of the waves. The Rossberg itself, never steep, and still more reduced in terror by the fall of a portion of it, was not available to him as a form _explanatory_ of the catastrophe; and even the slopes of the Righi on the left are not, in reality, as uninterrupted in their slope as he has drawn them; but he felt the connection of this structure with the ruin amidst which he stood, and brought the long lines of danger clear against the sunset, and as straight as its own retiring rays. Sec. 23. If the reader will now glance back to the St. Gothard subject, as illustrated in the two Plates +21+ and +37+, and compare it with this of Goldau, keeping in mind the general conclusions about the two great classes of mountain scenery which I have just stated, he will, I hope, at last cease to charge me with enthusiasm in anything that I have said of Turner's imagination, as always instinctively possessive of those truths which lie deepest, and are most essentially linked together, in the expression of a scene. I have only taken two drawings (though these of his best period) for the illustration of all the structures of the Alps which, in the course of half a volume, it has been possible for me to explain; and all my half-volume is abstracted in these two drawings, and that in the most consistent and complete way, as if they had been made on purpose to contain a perfect summary of Alpine truth.