One must assume so. Once we hand them in, they are immediately taken below ground - and the access to that area is severely restricted. No Lost Soul has the credentials required to descend there.

[ He does not sound pleased about that either. Every day there are more and more cursed statues placed directly under his workplace and he just... doesn't know what they're doing with them. It does not make for a relaxed work atmosphere. ]

Even if I had access to this classified information, I would not be at liberty to share with you - but as it stands, I admit to my own frustration that I am also in the dark.