Those made by the hand of humanity call forth the resistance of gravity and of disintegration, and it takes measures of strength and power to combat them.

That day, Harry and Fairchild worked with all their strength at the beginning of a stint that would last--they did not, could not know how long.

And they worked together.

Their plan of a day and night shift had been abandoned; the trouble engendered by their first attempt had been enough to shelve that sort of program.
Hour after hour they toiled, until the gray mists hung low over the mountain tops, until the shadows lengthened and twilight fell.

The engines ceased their chugging, the coughing swirl of the dirty water as it came from the drift, far below, stopped.