Posted this on http://megalithicpoems.blogspot.com/ earlier.

Couldn't find the original so have taken the liberty of changing a few words that didn't look right -

3rd line. alters to altars
13th line. Ard to And
15th line. Self-rightous to Self-righteous

Hope that's OK but please let me know if they shouldn't have been changed and I'll change 'em back.