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