The blocks are often eighty feet long, and twenty or thirty broad. They would seem to have been piled up by some external force, if the proximity of a rock identical in its composition, not separated into blocks but filled with veins, did not prove that the parallelopipedal form is owing solely to the action of the atmosphere.
Their elevation in general does not surpass one hundred and twenty toises; but their situation in the midst of a small plain, their steep declivities, and their flanks destitute of vegetation, give them a majestic character. They are composed of enormous masses of granite of a parallelopipedal figure, but rounded at the edges, and heaped one upon another.
At Fiesole, the vast Cyclopean walls, still fixed and firm as the everlasting hills, in their parallelopipedal layers, attest the grandeur of the ancient city. Here are walls built, probably, before the foundation of Rome, and yet steadfast as the Apennines. There are also a broken ring or two of an amphitheatre; for the Etrurians preceded and instructed the Romans in gladiatorial shows.