##....#..#                                          #..###....
###....#..                                          ##.#.##...
#.##....#.                                          ##...###..
..###....#                                          ###..#.##.
..#.##....                                          #.##...###
#...###...                                     .    ..###..#.#
##..#.##..                                        . ..#.##...#
.##...###.                                    . ^.  #...###..#
.###..#.## GULL CALL.                    .      . ^ .#..#.##..
.#.##...## ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ..#...###.
...###..#.                                          ...#..#.##
#..#.##... 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.)                 ....#..#..
.....#..#.                                          .....#..#.
......#...                                          #.....#..#
#......#..                                          .#.....#..
.#......#.                                          ..#.....#.
..#......#                                          ...#.....#