There is an academic term for this, "la critique génétique", in which earlier manuscripts of an author's work are studied and compared to see the process of how something develops. There's an article on English Wikipedia about
http://en.wikipedia.org/wiki/Critiqu...A9n%C3%A9tique, but it looks as if a machine wrote it. The article on French Wikipedia
http://fr.wikipedia.org/wiki/Critiqu...A9n%C3%A9tiqueis shorter but more readable.