Bookworm, I see you haven't had a reply to this so far, so I'll just offer this as a "hang on there" and to keep the thread alive. Check the "Assumptions" in the "Initial Approach" section of Vol. I.
I think it may be there.
This is Ozexpat's territory, really, but if he doesn't mind - or is still celebrating New Year - I'll be able to check my Vols I and II on Monday. I'll get back to you then.