.#.#..##..                                          .##.###...
....#.###.                                          .##.#.##..
......#.##                                          .##...###.
........##                                          .###..#.##
#.......#.                                          .#.##...##
##........                                     .    ...###..#.
###.......                                        . ...#.##...
#.##......                                    . :.  .....###..
..###..... 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.)                 .#.....#.#
##.......#                                          ..#......#
.##.......                                          ...#.....#
.###......                                          #...#.....
.#.##.....                                          .#...#....
...###....                                          ..#...#...