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##.#..#... THE  SEAGULL IS A  METAPHYSICS  TRICK; A #.....###.
.###.##... WORLD-BUILDER'S  SHORTCUT, TO  DEFINE  A #....#..##
#..##.#... SECTION OF  REALITY  AND IMPLY ITS SIZE: #...##.#.#
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.#..#.##.# A  SEAGULL CAN BE DEFINED  BY AS  LITTLE ###.##.#..
##.###.### AS  FIVE  VERTICES;  SIX  TRIANGLES.  (I ..##.###..
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#.#.#.#.#. AT LEAST A DOZEN BIRDS.)                 ###.#.####
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