 Although today seen mostly as a failed first effort to adapt the Oz books, "The Fairylogue and Radio-Plays" is notable in film history because it contains the earliest original film score to be documented.The film is lost, but the script for Baum's narration and production stills survive.The films were colored (credited as "illuminations") by Duval Frères of Paris, in a process known as "Radio-Play", and were noted for being the most lifelike hand-tinted imagery of the time.