Less than thirty miles from the Dutch coast the _Koning der Zee_ met her doom. Travelling at twenty-two knots, her bows struck the flexible wire bridle connecting a pair of mines. Like porpoises, the deadly cylinders swung towards the ship under the strain on the span. One struck the hull just below the water-line on the starboard side, nearly abaft the foremost funnel; the second bumped heavily under her port quarter. Practically simultaneously the deadly mechanical mines exploded. Calculated to blow a hole in the bottom of the most strongly constructed war-ship afloat, the mines simply pulverized the thin steel plating of the luckless Dutch vessel. Amidst the rush of escaping steam the _Koning der Zee_ began to settle rapidly.