 " Behind the Curtain " ( All @-@ Story Weekly , September 21 , 1918 , reprinted in Famous Fantastic Mysteries , January 1940 ) 
 " Behind the Curtain " ( All @-@ Story Weekly , September 21 , 1918 , reprinted in Famous Fantastic Mysteries , January 1940 ) 
 Behind the Curtain  ( All @-@ Story Weekly , September 21 , 1918 , reprinted in Famous Fantastic Mysteries , January 1940 )