I visited several locations and sometimes that worked, and sometimes it didn't. It's a hit-or-miss proposition. To give you one example, the headquarters of the Royal Society eventually moved to a place called Crane Court, which is off of Fleet Street in London. In the final volume of the cycle, we see some action at Crane Court. So I went there when I was in London, and found the street, and walked to the end of it, which is where the headquarters were. It's sealed off by this wall of blue glass: it's this modern office structure that they've just slammed down across the end of this street. Sometimes you get lucky, and you find a building that's still standing there, and that looks the same as it did 300 years ago, and other times you find nothing at all.