Charles Brockden Brown,
Edgar Huntly, or The Sleep Walker
(1831)
“ If you imagine a cylindrical mass, with a cavity dug in the centre, whose edge conforms to the exterior edge; and if you place in this cavity another cylinder, higher than that which surrounds it, but so small as to leave between its sides and those of the cavity a hollow space, you will gain as distinct an image of this hill as words can convey. The summit of the inner rock was rugged, and covered with trees of unequal growth. ”
