"This image (seemingly animated) walks with them in the broad Day-light; and if they are employed in the delving, harrowing, Seed-sowing or any other Occupation, they are at the same time mimicked by the ghostly Visitant. Men of the Second Sight ... call this reflex-man a Co-walker, every way like the Man, as his Twin brother and Companion, haunting as his Shadow."
...................... -Kirk, Secret Commonwealth, 1691

NBC-TV broadcast a picture of Lyndon B. Johnson sitting transfixed in front of three television sets, each with a different image of LBJ.

CBS-TV broadcast the picture of an ancient Jack Benny on a TV talk show, in the studio, watching a movie of an elderly pajama-clad Jack Benny, at home, watching an old movie, on TV, in which a young Jack Benny, in the Orient, makes love to Dorothy Lamour.