"Well, it's a castle. So it's probably in a basement, near a big hall for feasts. I know there's a big hall, I walk passed it earlier. But I don't know if it's the big hall. We can find out though."

He was of course, basing all this on the few movies that he's seen and one documentary. None the less he starts heading in the same direction as Sherlock, to head out of the snow and towards the great hall.