Ah -- not much! Everything I've seen of the city and learned from talking to people is pretty much just what is in the letter -- so the story's consistent if nothing more! And the colour returning to places like the square where so many meeting took place, seems to back up the alleged reason for us to be brought here at least!

But I've noticed from talking to people that a lot of the people brought here were important in their own world or had connections to important people, and the gates in the city are heavily guarded which makes me think something else is going on.