holding the book open to shield his face from view , he began screaming into the microphone : and oft in the hills of habersham , and oft in the valleys of hall , the white quartz shone , and the smooth brook-stone did bar me of passage with friendly brawl , and many a luminous jewel lone crystals clear or a-cloud with mist , ruby , garnet and amethyst made lures with the lights of streaming stone in the cliffs of the hills of habersham , in the beds of the valleys of hall .