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.)