I realise this is a rather random, slightly  silly question, but I am  sort of curious about it (that  and I need something different to blog about). Not very far away in charton village is  a wall. It divides the park and the road, and I follow the pavement along it quite frequently. It looks very, very old – old enough to arouse my curiosity. Judging from the look of the brickwork and the height of a doorway cut into it, I’d say it was at least medieval. My question is, then, how can I find the age of this  wall?