"Yes, I agree that he will not like this. The good news is that the passage is very little used or the issue would have come up before this. Maybe we can get Magus Crus to help secure the door. As to the map, it looks like the passage leads to an underground lake. I wonder if the river under the Keep leads to the lake? It seems to be in the same area."
"I believe we can try to clear the cave in now. I don't mind doing it myself, but it seems some of you may not feel the same way. I'm not sure how Boris would feel about us hiring workers to go through his cellar, He may want to keep this news under wraps."