[Andy B]

I think another solid possibility for the good player is that he raised with a three-card low. The Deuce paired him, and another Deuce died behind him. Meanwhile, two low hands have caught good, and you're obviously on a high hand which beats Deuces. I'm guessing his enthusiasm for this hand diminished significantly on fourth.

As should yours. If fourth isn't a fold for you, it's pretty damned close. I have an older edition of Zee, but at the beginning of the chapter on fourth-street play, he says that if you have a high hand and are against a couple of low hands, and on fourth street they both catch cards close in rank to their door cards, that is the time to get away from your high hand. Also tilting this towards a fold is the fact that an Ace is gone.

Since you called fourth, fifth is definitely a fold.