No you are not, neither am I

I had taken a few shots of a Steam engine passing through Maryport, that was on its return to London. Well the carriages were and the passengers,( possible engine change to diesel down the line ). As I returned to my car, I saw a large sandstone block, that had not been there the last time I parked in that area. On this block was a map of Maryport. It stated I was there, well I knew that....I am not now,