Ok for those of you who have read the book....any idea on who the mysterious R.A.B is? I have a hunch on who this person could be and where this person might've put this one horcrux...Remember in the 5th book when Sirius(*tear* bless him) was telling Harry about his brother Regulus? Well, I'm thinking that R.A.B. is Regulus Black. I don't know if his middle name started with an "A" but I'm sure it's him...Another reason why it could be him is that we know most of the Death Eaters...at least the death eaters that actually count...like Dolohov, Malfoy, Snape, Lestrange, and Nott...wouldn't Black be in it? Ok now to where this Horcrux could be hidden...I think the Horcrux that Regulus could've possibly taken must be hiddin somewhere in Grimmauld Place....I mean if a person was to hide something of great importance then wouldn't they hide it somewhere that has great importance towards them? Isn't Grimmauld Place where Regulus has grown up? He knows..or should I say knew seeing as to the fact he's dead...that it would be safe there...nobody lives there...so...well, it would be considered a safe haven for a horcrux wouldn't it? Anyways tha's sort of "theory"...I just hope what I'm saying makes sense to all of you who could be reading this....I'm positive that Regulus Black will have more importance in the seventh book...than just being Sirius' dead little brother....Anyways I'd like to hear what you think about this!