Mark yon altar
... See this wide circus
Skirted with unhewn stone; they awe my soul,
As if the very Genius of the place
Himself appeared, and with terrific tread
Stalked through his drear domain....
Know that thou stand'st on consecrated ground--
The mighty pile of magic-planted rocks,
Thus ranged in mystic order, marks the place
Where but at times of holiest festival
The Druid led his train.