Soon the crumpled, broken, crushed remnants of that strong hulk will follow.

This watery monster doth not feed upon what he swallows! He destroys for the mere love of destruction. Night had come now. I returned to my ship. The shifting sands and the whirlpool had uncovered their horrors. But I feared them no more! Like the horse-tamer when he has at last succeeded in thrusting the steel bit between the champing and gnashing teeth of the wild young steed, I now felt that they were conquered.

“And now for Thor’s Hammer!” was my cry, as I sat down beside Bulger for a brief moment’s reflection.

The first streak of gray light in the east found me on deck.

“Thor’s Hammer” was a huge shaft of black, flinty rock, projecting about twenty feet out of the water and ending in a hammer-shaped head. It guarded the channel where it reached the sea, standing exactly in the middle, thus forcing a vessel to pass on one side or the other of it.

Beneath the waters, this dread sentinel must have ended in a gigantic ball, which, in the flight of time had worn a socket for itself in the bed rock of the channel; for it swung loose and free, moved by every powerful billow from side to side, threatening swift destruction to any passing craft.

To speak frankly, the sight of this terrible engine of destruction appalled me! How shall I escape the vigilance of this gigantic sentinel, who knows no sleep, no rest, whose blows fall with like fury on friend or foe? How shall I lull him to repose for a few brief moments?

Determined to study closely the strength, the rapidity, and the character of the blows struck by “Thor’s Hammer,” I caused several huge structures of plank and timber to be erected near the position of this mighty sentinel of rock. One after the other I ordered them to be thrown into the channel.

At first, I was fairly paralyzed upon discovering that even the slight vortex caused by the drifting by of one of these wooden structures set the swinging rock in violent vibration and always towards the passing object.

Judging from the effect of Thor’s Hammer upon these floating masses of plank and timber, a single blow would suffice to crush the very life out of my ship in spite of her unusual staunchness.