Lady Bird

So it's 1941 or so, and Jessica Mitford, 24 year old daughter of a British nobleman, is newly come to America. She's moving in high New Deal circles, and writes to her mother back in England that she has met "Lyndon Johnson and Lady Bird." So her mother writes back,

"Who is Lady Bird? I looked her up in the Peerage, but could find no trace."

(Jessica Mitford, A Fine Old Conflict (1977), p. 24)