The Mundane Shell is a vast Concave Earth， an immense

    Harden'd Shadow of all things upon our Vegetated Earth，

    Enlarg'd into Dimension and deform'd into indefinite Space，

    In Twenty-seven Heavens and all their Hells， with Chaos

    And Ancient Night and Purgatory. It is a cavernous Earth

    Of labyrinthine intricacy， twenty- seven folds of Opaqueness，

    And finishes where the lark mounts.