Absolutely perfect Pitchwife!
(I can almost hear Legate saying 'but you must explain every line' - and you most certainly have done).
Agree the Old Man is such a mystery, and I can't remember him being discussed much on the Downs. Was he last of a hereditary line that were the 'wardens' of the Paths of the Dead? Or had he indeed been there himself since, presumably, Isildur's day in some sort of suspended animation due to an obscure subclause of The Curse?
Along, possibly, with The Mouth he seems to be the only human with a thousands-of-years lifespan. How does that work?