Trampled underfoot

There are quite a few of these little plaques set into the pavement around the Plain and the town end of the Cowley Road. They are the only example I'm aware of of what computer programmers would term an easter egg in town planning. Doubtless there are more - I once speculated with a friend that one of the best things about being a town planner would be the ability to name roads in such a way as to create bad puns like "Sailor Way". Perhaps it's for the best that I never went into town planning. These are far more fun than anything I could have come up with. Sadly I know nothing about their history.