Is Christine the killer? (Spoilers)
So the story is largely a man-hating tale in which John’s refusal to listen to women results in him being brutally murdered. He aggressively shuts down any talk of psychic power from his wife and the sisters, even when his wife pleads that their visions alleviate her grief.
He ignores his own psychic intuitions about his impending death and pays the ultimate price for it.
But could du Maurier be really driving the dagger home by suggesting that John is responsible for Christine’s drowning (as Laura casually suggests at one point) through his neglect of women, and that the reason the dwarf is implausibly three foot tall and wearing a red coat - just like Christine - is because their daughter has come back to exact her revenge, deliberately taking a form that will lure John..?
This might also explain the knowing shake of the head the dwarf delivers, as if to say ‘Thought I was your dead daughter huh? Wrong’ before slashing his jugular.