No: HPFGUIDX 134779 It seems the best way would be to find a Dementor, throw it to him and yell "Fetch!" The difficulty with RAB is not just finding someone with the right initials, but someone who 1) knows Voldy was using Horcruxes and 2) is on par with DD, wizarding wise. Any speculation on whether the locket was swapped recently, or years ago?