semi-OOC: pertaining to the Great Horcrux Hunt
definite
*ring (people are making comparisons to a book by some bloke called Tolkien; possibly genealogy research would help)
*book (probably a journal of some sort, extrapolating from inn conversations)
*cup with Hufflepuff's badger (apparently Bella's safeguarding it - look into that) (bundled into the portion of Bella's estate that's returning to Narcissa; she'll be passing it along)
*some sort of tiara (?????????????) (could be Ravenclaw's diadem, if said is not as lost as people think) (What kind of idiot puts something of this much personal value in perhaps the most frequented hiding place in Britain?)
incomplete
*locket (What is it with this man and women's jewelry?)
OOC: logistics time (offer not valid in parallel universes)
Give it a week/week and a half, and the diadem will turn up, right where canon left it. Regulus will facepalm. Possibly more than once.
Re: the cup, I need to sort out logistics a bit more, but I can see a chance that Regulus could get it after Bella meets... whatever end she meets. (I doubt she was expecting to need a will, since Voldie was doing so well, and the cup was probably entrusted to her specific care, not Rodolphus' as well. Perhaps such estate as Bella had would, in the absence of a will, default back to her family?) If I can't make that approach logical, it'll just be more thrilling heroics for Sirius and James.
Once they have a name to work with from the anagram charm, the ring shouldn't be that hard to find (even if the thought process starts with 'here's the family he's related to, start with what's left of their house and we'll improvise from there.')
The diary's likely to provide the most trouble, of the complete Horcruxes, and therefore the most opportunity for James and Sirius to get their thrilling-heroics fix. Even if it is in Malfoy's possession (which it doesn't have to be), Bella probably wouldn't have mentioned as much without direct prodding, if she knew where anything other than the cup was. She's not the sort to point out anyone's high standing but her own.
Regulus will probably insist they do something about the locket as well, even if it's not technically complete; at the very least, finding it and seeing what (if anything) Voldie did to it would be a Good Plan. Since it's not a full Horcrux, it's probably in one of the hideouts rather than the zombie-lake cave. (Whatever distilled bloat hasn't been triggered has probably evaporated by now. However, caution is still urged when attempting to search around the hideouts' beds, if such proves necessary.)