Hartford Bridge Flat here, for instance, how has it changed! Ages ago it was the gravelly bottom of a sea.

Then the steam-power underground raised it up slowly, through long ages, till it became dry land.

And ages hence, perhaps, it will have become a sea-bottom once more.

Washed slowly by the rain, or sunk by the dying out of the steam- power underground, it will go down again to the place from whence it came.

Seas will roll where we stand now, and new lands will rise where seas now roll.