Now it's starting to look like something

I like the font in the 204/205 picture. I also like the stones. But I think you should experiment with some dirt on the walls. Some lines from flowing water down the wall would look good.

A torch or 2 on the wall would also add to the effect, or maybe the character could carry a torch that would cast shadows and glowing effects on the wall (that would be the best )

Its getting better and better, and your almost there. Just some small details and it will be perfect