Sophia The headstones were moved outwards from where they were. If you can find where section C is - there is a map in the library -linen with all the graves with their section and grave no. if you can find the grave number on it in section C you will hae to go to the cemetery and have a look where section C is look to the right and you may find the grave. That is what I did some years ago to find my Borrowscale grave and headstone. Most of the graves there had a headstone. You may get some help in looking at the linen map from the library staff.
I hope this helps
Joan B

They moved the stone outwards to make a garden