Original: The screenplay is by AJ Carothers based on the play that was based on the book My Philadelphia Father by Cordelia Drexel Biddlep .55 Burt , Nathaniel The Perennial Philadelphians : The Anatomy of an American Aristocracy 1999 University of Pennsylvania Press .
Simplified: This was the last live-action musical comedy film produced by Walt Disney , who died during its production .