And oftentimes great groans, and grievous stounds,
When too huge toil and labor them constrains;
And oftentimes loud strokes and ringing sounds
From under that deep rock most horribly rebounds.
“The cause some say is this. A little while
Before that Merlin died, he did intend
A brazen wall in compas to compile
About Caermerdin, and did it commend
Unto these sprites to bring to perfect end;
During which work the Lady of the Lake,