No, the picture is the right way up; I was surprised to find this only recently, all things considered. It has been re-used, but not as it should be. The face of the stone was carefully worked to a fairly flat surface in a circle, and then the C was finely chiselled. I have no idea (well maybe I have) of its original siting; Please tell me where it is in Penzance. I will say no more, squire, clues can be offered now and then.
