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e interior in a frowning wall of basalt, and bounded on the south, where it opens to the sea, by the Scuir More. The Scuir is a precipitous mountain, that rises from twelve to fifteen hundred feet direct over the beach. M'Culloch describes it as inaccessible, and states that it is only among the debris at its base that its heliotropes can be procured; but the distinguished mineralogist must have had considerably less skill in climbing rocks than in describing them, as, indeed, some of his descriptions, though generally very admirable, abundantly testify. I am inclined to infer from his book, after having passed over much of the ground which he describes, that he must have been a man of the type so well hit off by Burns in his portrait of Captain Grose,--round, rosy, short-legged, quick of eye but slow of foot, quite as indifferent a climber as Bailie Nicol Jarvie, and disposed at times, like the elderly gentleman drawn by Crabbe, to prefer the view at the hill-foot to the prospect from its summit. I found little difficulty in scaling the sides of Scuir More for a thousand feet upwards,--in one part by a route rarely attempted before,--and in ensconcing myself among the bloodstones. They occur in the amygdaloidal trap of which the upper part of the hill is mainly composed, in great numbers, and occasionally in bulky masses; but it is rare to find other than small specimens that would be recognized as of value by the lapidary. The inclosing rock must have been as thickly vesicular in its original state as the scoria of a glass-house; and all the vesicles, large and small, like the retorts and receivers of a laboratory, have been vessels in which some curious chemical process has been carried on. Many of them we find filled with a white semi-translucent or opaque chalcedony; many more with a pure green earth, which, where exposed to the bleaching influences of the weather, exhibits a fine verdigris hue, but which in the fresh fracture is generally of an olive green, or of a brownish or reddish color. I have never yet seen a rock in which this earth was so abundant as in the amygdaloid of Scuir More. For yards together in some places we see it projecting from the surface in round globules, that very much resemble green peas, and that occur as thickly in the inclosing mass as pebbles in an Old Red Sandstone conglomerate. The heliotrope has formed among it in centres, to which the chalcedony seems to have been drawn, as if by
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