In shelving valleys rooted deep,
And levelled every dale and steep.
Each pit and hole that stopped the way
They filled with stones, and mud, and clay,
And all the ground that rose and fell
With busy care was levelled well.
They bridged ravines with ceaseless toil,
And pounded fine the flinty soil.
Now here, now there, to right and left,
A passage through the ground they cleft,