Talk:Human-presence-revealing Spell

Why, when Hermione cast this spell in 12 Grimmauld Place, did it not locate any human presence? Harry and Ron were both within the vecinity, so it should have detected them. Also, the same with Xeno's place... why wouldn't the Death Eater's spell also target Xenophilius Lovegood and his fellow Death Eater? 24.49.35.99 22:11, July 20, 2010 (UTC)