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 CHAPTER VIII

ENCHANTED CAVERNS

LONG the bolder coast-line of this island, where the cliffs, without being very high, are steep and frowning, there are some remarkable caves, which I today visited with Mr. Hoseason, in his boat—he having sailed over from Yell Island. To me, at least, they seemed remarkable, principally by reason of the various and vivid colours which the rock perforated by them begins to display as soon as their entrance is passed. This rock, as elsewhere in the Shetlands, is sedimentary, but broken here and there with veins of quartz, often of considerable thickness, which seem to have been shot up in a molten state and to have afterwards cooled—"seem," I say, for I have no proper knowledge as to their geological formation. This quartz, which when exposed to the light of day is white or whitish, is here of a deep rust-red, and this, distributed in long zigzag lines or meanderings, is sufficiently striking, but nothing compared to the much brighter reds, the lakes, and brilliant greens with which the interior of the cavern is, as it were, painted; so that the whole effect, lit up by the candles which we used as torches, resembled, in a surprising and quite unexpected way, those highly coloured and very artificial-looking representations of natural scenery which one sees on the stage—in pantomimes 47