The Sin of Harold Diddlebock sub-series (1944-1951) contains materials related to the development, production, and post-production of the California Pictures Corporation film, The Sin of Harold Diddlebock (1947), also known as Mad Wednesday. Records include advertising and publicity, legal, production and direction, and story development records, as well as film soundtracks. Materials included are correspondence, pressbooks, newspaper and magazine clippings, black-and-white photographic prints and negatives, music scores and sheets, contracts, agreements, screenplays, continuities, and casting sheets.