It's an older story, so the reason is probably just "he's evil, innit?" One didn't used to need to explain why brooding dark noblemen would pursue and murder beautiful young girls; it was just kind of assumed.:o I don't know what possessed me to use the above (awful) font. Sorry about that. :-\ I needed to pull out one of my spouse's literary lenses to view this tale... as a product of its time.
I liked the heart in the box. It was neat. Not my very favorite old-timey story, but I enjoy the old-timey ones a lot in general regardless.