Read it through once

We wondered how such a solid mass of masonry could be affected even by an earthquake, and could not understand what agency had made Banias a ruin; but we found the destroyer, after a while, and then our wonder was increased tenfold. Seeds had fallen in crevices in the vast walls; the seeds had sprouted; the tender, insignificant sprouts had hardened; they grew larger and larger, and by a steady, imperceptible pressure forced the great stones apart, and now are bringing sure destruction upon a giant work that has even mocked the earthquakes to scorn! Gnarled and twisted trees spring from the old walls every where, and beautify and overshadow the gray battlements with a wild luxuriance of foliage.