I'm pretty sure I talked to the villagers again after taking the horses and carriage to the stable, but they're not very responsive. I'll double-check when I get home tonight. Are you implying that the coachman will return? I was presuming from the bloody cloth that he has met some horrible demise. The discussion implies that there is some impact caused by the passing of time. I've used WAIT and tried sleeping in the bedroom, but I don't seem to be able to get time to pass.
Incidentally, I did mention that I've examined and searched every noun in the game, including the graveyard. That's how I found the light source. Should I perhaps be examining something in the graphics that's not in the description?