Proof (for me at least) that R.A.B. is Regulas

[Lisa Rourke]

No: HPFGUIDX 134267

Like many of you, when I first saw the initials R.A.B. I immediately
thought of Regulas. But others have come up with some interesting
theories to the contrary. I think I found something that (to me
anyway) seems to be proof positive.  I remembered in OoP Harry and
Sirius cleaning out the stuff in the drawing room. Among the objects
that Sirius throws into a sack is ..."a heavy locket that none of them
could open.." ( OoP pg. 116 American ed.).  It seems to me that this
is THE locket.  Where it is now remains the question- with Kreacher's
belongings at #12 or did Mundungus fence it with the other stolen
objects?  

I also think Regulas had an accomplice since Harry and Dumbledore had
to work together in order make it out of the cave. 

Lisa