In 1973, I wrote a fan letter to Lotte Lenya, who answered it in a typed note.  I'm still  bothered that I have no idea what became of it.  The note was typed, and she was clearly a student from the Vixmom School of Typing.  In a handwritten postscript she wrote "It's a good thing I became an actress. I would have starved to death as a secretary."