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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 ##.....###
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.##...###. 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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