Many, many years ago, Carl J. Sedylmayr had a variation of pepper's ghost/girl to gorilla on RAS called, "GALATEA" in which a stone statue turned into a "living maiden".
Just another tidbit of info. pertaining to the gorilla girl on Royal American Shows...For the 1967 season, the show had a gorilla girl show (Princess Atasha) that was presented by George Dugan and Harry Renn was one of the top grossing shows all season...It was said that at St. Paul, MN that year, out of the entire back end line-up, this show grossed money only second to the "Club Lido Revue".
I remember (late 1970's ?) there was a girl to gorilla show booked on the Million Dollar Pier in Atlantic City, NJ (I believe this show was owned by the late Peter Hennen).
"Don't forget to be half fair and give a little credit to the small concessionaire"