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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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