... murk And heaveth the while boulders of wondrous weight— Leaving no doubt in thee that 'tis the air's Tumultuous power. Besides, in mighty part, The sea there at the roots of that same mount Breaks its old billows and sucks back its surf. And grottos from the sea pass in below Even to the bottom of the mountain's throat. Herethrough thou must ... — Of The Nature of Things • [Titus Lucretius Carus] Lucretius
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