Sometimes I wonder about putting future information into my readings. The first time I read this chapter, this exchange really didn’t mean anything to me:
“Yess,” hissed Harry. “Would never break promisse.”
The snake seemed to hold still, as though in shock, and then began to sway again.
Later on, based on things we read in future chapters, it becomes very likely that a snake-listener can detect the truth-value of a statement spoken in Parseltounge in some magical way, and this sentence suddenly makes a LOT of sense, and becomes much more important. In my recording of this scene, I placed a good deal of emotional emphasis on this line, much more than I would have if I didn’t have this knowledge from future chapters. I’m not sure if that was a good thing to do.