I just noticed something potentially very important.
Chapter 4 ended with us riding to reclaim the ring from Luisa's body. You know, the one that we believed might open that locked chest, the chest with some kind of magic on it.

Chapter 5's opening passed the
whole night and went into the next morning. We skipped the entire getting the ring and opening (or at least attempting to open) the chest scene.
If we had the ring, we certainly would have tried opening the chest by now.
Did the ring fit the lock?
If so, what was in the chest? 
Its opening is certainly something that would interest the
whole party.
If we found gold, then that should go to Roderigo.
Anything in the chest , Tristan (and presumably several of the others) would have examined as a possible clue, of course.
Delight is to him- a far, far upward, and inward delight- who against the proud gods and commodores of this earth, ever stands forth his own inexorable self.
-from Moby Dick (Hermann Melville)