There are so many curious stories of creatures and people and 'beings' I find it all so fascinating...

The knockers are also referred to as 'Tommy Knockers' sometimes.

The stories I read were much like what OMJ said, but then I also read that there is a group of 'knockers' in some of the mines that knocks to warn the minors of whenever there is danger of a cave-in or something to that effect.

I've always enjoyed the Green Children story and wish there had been someone who would have found where the children came from. I feel there had to be a community or a vast civilization underground.

Alisa, I like your scrying paper. That's interesting...
You did a fabulous job on your sketch, his eyes are perfect!