the poem quoted, (commonly referred to as Jerusalem) opens the poem Milton, perhaps as formula for regaining paradise, so to speak. Our ancient megaliths had only comparatively recently become of any interest, but the perspicacious Blake would have understood that clues to the wisdom we had lost would reside in them. He certainly ends Jerusalem by stating that '...all Human Forms identified, living going forth & returning wearied Into the Planetary lives of Years Months Days & Hours..' which is the business of the megaliths.