SELBIT, P.T. (Percy Tibbles). Shadow People Advertising Booklet. Circa 1921. Eight-page publicity booklet describing and picturing Selbit?s stage illusion in which ?shadow people? materialize in a frame at the center of the stage. The first example we have encountered. Selbit?s illusion debuted at nearly the same time a Maskelyne & Devant effect was first performed on a London stage, The Window of the Haunted House. Though the illusions are different, they are often confused for each other, and Selbit?s is the lesser-known of the two.