Otto von Bismarck? Heinrich von Poschinger? Léon Gambetta? General Booth-Tucker? W. B. Bonnifield? Herbert S. Bigelow? S. E. Kiser? Anonymous? Question for Quote Investigator: According to a comical legend, a positive thinker accidentally fell from the roof of a skyscraper. While passing each story on the way down, this optimistic person happily remarked, “Everything is …