That's my assumption, too. Skeletons from the past round. Players who died here and had their bodies buried, or thrown down a ditch.

[He frowns.]

The skeletons at the mines, they... [--swallowed you up, he means to say. But he doesn't.] Do you think any of this is related to the reason the Sheriff keeps destroying our dead bodies? Cremation. Corpse gravy. It's weird, isn't it?