| http://www.w3.org/ns/prov#value | - On the central ridge of the opposite side of the island, 10 miles distant, are a large number of very fine basaltic columns, and this must have been the quarry for the structure just described, for the configuration of the land is such that roads would have been impracticable, and the only deduction is that the material must have been taken down to the coast and thence by water to the location on
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