These tapes have been found, which were taken from the desk and various bootlegs. At the time we never got to hear them, they didn't seem to be available or they just got put to one side.
I've always felt that a person's intelligence is directly reflected by the number of conflicting points of view he can entertain simultaneously on the same topic.
The best preparation for acting is life - observing life and people and observing yourself. All that becomes your library. So when you have to research a part, a scene or an emotion, you go into the library and get what you need.