After something like fourteen years in post-secondary education, I can say without a doubt that this woman was the smartest person I have ever known. The next dozen were blood relatives of hers, mostly female. Margaret was fluent in six (?), eight (?) languages and could get by in a dozen others. Havivg only an eighth grade education, she ws fascinated by puzzles. She could work in her head time/distance problems that I later learned require calculus to solve -- and not single variable stuff. She had a beautiful singing voice and a flair for painting: usually irises in various settings.
She and my father would speak German around the house so that the kids wouldn't understand them. I learned German as an adult and would play back some of the conversations that I could remember. Most all of them contained her corrections to my father's grammar -- he lacked her flair. She seemed to think it was funny.