Fitzjames is about to ask how Strange got himself cursed but it's immediately obvious. As is the silent swearing.

"All right, all right—look, I've brought you these." He holds out the sprigs of mustard greens, as well as a dead flower that he found on the deck that seems to have blown in from somewhere. It looks tropical, which is strange, but he's been so eager to help his new friend that he hasn't given it much thought.