Two weeks ago, the League of Professional Theatre Women and the NY Public Library for the Performing Arts had an oral history event with Donna Murphy. She was interviewed by Rick McKay, the guy who made Broadway: The Golden Age (and is working on its sequel). The first time I saw Donna Murphy was in Song of Singapore, and I remember poking my friend Jeff Bieganek in the shoulder, multiple times, saying, "Isn't she great?"
There was a lot of talk (much more than I needed to know) about her time at NYU, studying with Stella Adler. But once she got past that, she talked about the workshop for Passion, and how they started with an unfinished book, and one (1) song. I know that Sondheim writes and rewrites a lot in rehearsal (me, too- so much that I can make some actors and directors crazy). I never think of him starting with quite that little. I like knowing that's the case.