 Stage actress Lucille La Verne (qv) provided the voice of "The  Bomber". It was surprising for La Verne to do a cartoon since, at  that time, many stage actors refused to do film, much less a  cartoon. About a year later, La Verne voiced the Wicked Queen/Old  Crone, in Disneys _Snow White and the Seven Dwarfs (1937)_ (qv).