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.#....###. GULL CALL.                    .      . - .....#.##.
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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: ..#.......
.#.##..#.. PLACE A FLOCK OF BIRDS  AT THE EDGE  AND #..#......
...###..#. MAKE  THEIR  CALLS  TESSELATE  OVER  THE ##..#.....
...#.##..# ENTIRE VOLUME                            .##..#....
.....###..                                          .###..#...
.....#.##. A  SEAGULL CAN  BE DEFINED BY  AS LITTLE .#.##..#..
.......### AS  FIVE  VERTICES;  SIX  TRIANGLES.  (I ...###..#.
.......#.# WOULD RECOMMEND  HANDLING  IN SWARMS  OF #..#.##..#
#........# AT LEAST A DOZEN BIRDS.)                 ##...###..
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