Having tried to do this genre myself (and failed), first let me say how impressed I am that you were able to so faithfully re-create a Brontë-like style. And it flowed so naturally, wasn't wooden or contrived at all. That technical part would've wowed me all on its own.
But you did such a wonderful job of adapting Harry and Snape (and Ginny) to the sketch of the story, keeping it magical, preserving the IC traits of our heroes, and infusing the entire thing with the same pathos of the original story. Your narrator rang true, as did your Ginny and Kreacher. I really liked the evolution of Harry and Snape's relationship--always a wonder to me when an author can manage to make it believable in the space of several scenes.
You made me cry at several points: Harry's bedside scene, of course, but mostly at the end when Woodlock witnesses their 'hereafter' happiness, their eternal state of togetheness on the moors. The next to last paragraph, where you describe that single spark of joy that burned brightly enough to carry over into the afterlife, well, I really did sob, reminding me why exactly, my name is joanwilder. :)
I really have a great fondness for all the Brontë sisters, and I think Emily would be feel very honored that her story inspired such a tale, of two other 'not to be in this world' lovers. I'm full of admiration that you tackled it, worked it through, and managed to create something so heartbreakingly romantic and, despite its inevitable outcome, fulfilling. Congrats!