@,,@,,,@,,                                          @@,@,,,@@@
@,@@,,@@,,                                          ,@@@,,@,,,
@@,@,@,@,,                                          @,,@,@@,,@
,@@@@@@@,@                                          @,@@@,@,@,
@,,,,,,@@@                                          @@,,@@@@@,
@,,,,,@,,@                                     ,    ,@,@,,,,@@
@,,,,@@,@@                                        , @@@@,,,@,,
@,,,@,@@,@                                    , :,  ,,,@,,@@,@
@,,@@@,@@@ 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.)                 @@,,,,,,,@
,,@@@@,,,@                                          ,@,,,,,,@@
,@,,,@,,@,                                          @@,,,,,@,@
@@,,@@,@@,                                          ,@,,,,@@@@
,@,@,@@,@,                                          @@,,,@,,,,
@@@@@,@@@@                                          ,@,,@@,,,,