Kahan casts blindness on Borimer. His sword is ready as he takes the lead.
You move down to the corner at 23. You notice three things in particular. First, the western door (to room 24) has been left open, whereas it was closed yesterday when you passed by. Second, there are stairs around the corner that lead down. And third, the torturing sounds have stopped, but they would have come from somewhere around here.
You quickly describe to Borimer what you see.
The room to the west (24) appears to be some sort of barracks. it has a line of bunks along the north wall.