Regarding headstones (General)
I took a photo of a gravestone hoping to be able to lighten or darken it on my computer but that did not work. So I placed some lunch paper (or you could use butchers/fish and chip paper) and did a rubbing with crayon. I had great success. Found out it wasnt mine but that is by the by.
Hope you enjoyed the blackberries. I am only getting frozen ones in NZ.