Not long after this the sea itself came to the aid of the Tyrians. There was a storm; and, as a consequence of it, a heavy swell rolled in from the offing, which soon undermined and washed away a large part of the pier. The effects of a heavy sea on the most massive and substantial structures, when they are fairly exposed to its impulse, are far greater than would be conceived possible by those who had not witnessed them. The most ponderous stones are removed, the strongest fastenings are torn asunder, and embankments the most compact and solid are undermined and washed away. The storm, in this case, destroyed in a few hours the work of many months, while the army of Alexander looked on from the shore witnessing its ravages in dismay.