 Bert, as played by Van Dyke, was a composite of several characters from Travers' stories.Travers demanded any suggestions of romance between Mary Poppins and Bert be eliminated and so lyrics were written for "Jolly Holiday" that clearly indicated that their friendship was purely platonic, but some subtle hints of romance, however, remained in the finished film.The film's music features music and lyrics by Richard M. Sherman and Robert B. Sherman.