[DonnerT]

That's the way I read it. He knew Frodo had a mind to separate and enter Mordor alone to save his friends from what he saw as certain death. The closer they got to that time the more watchful Boromir became. He knew Frodo had no intention of taking the ring to Minas Tirith.

[DonnerT]

Let's bring the question of whom to cast as Bombadill (had it been in the movie) to this thread.
Patrick Stewart could have played him but I would have cast Stewart as Gandalf; though the image of him saying 'Engage!' to Shadowfax spoils the picture. William Shatner as Tom?...naww he's too silly. I never liked him in anything anyway. How about Merlin Olson?