 The production also included a full original score consisting of 27 cues by Nathaniel D. Mann, who had previously set a couple of Baum's songs in "The Wizard of Oz" musical.It debuted four months before Camille Saint-Saëns's score for "The Assassination of the Duke of Guise", and is therefore the earliest original film score to be documented.It was based on Baum's books "The Wonderful Wizard of Oz", "The Marvelous Land of Oz", "Ozma of Oz" and "John Dough and the Cherub", with intermission slides showing previews of "Dorothy and the Wizard in Oz", which was not sold in stores until near the end of the run.