Without someone telling me, I would have totally missed these in the street. There's a row of them, as you can see in the next picture. Just right in the middle of the street.
After the Roman and Cathedral tours and lunch, I went to the Castle. Imposing!
The most interesting part of the Castle for me was in the prison chapel. When originally built, the prison was built on a system of separation, keeping prisoners alone. And the chapel was built the same way, so there are individual little cells where the prisoners all stand, with a door between each, and watch/listen to the preacher in the pulpit up above.
And then it occurred to me to see if there were any Green Men about, so I asked, and the docent gave me a map! Here's the first one, in a little hidden place, but lit now by modern lighting.