how does a man spend eight years finding new ways to present the same viewpoint, to develop the same argument?
This is the question (p. 70) Forrest wants to investigate in the Vatican Archives. It is a question which could be asked about Forrest himself, who has been married eight years. He has a significantly "squishy" experience following the voice of an unseen youth as he nears the place of Bruno's execution (p. 9). And coincidence of coincidences (and not unappreciated by Forrest) Marcello … lives on the Via Giordano Bruno.
There may be more to Windham's list of bus stops than meets the eye.
(Curiously, for all the specified places in Two People, we never learn exactly where Forrest lives, do we? Somewhere near the Spanish Steps, of course, but above them? below? … )