Send a message to the person who requested a photo of the grave monument of Charles James Barton with the following comment:
I am Charles James Barton's granddaughter, and currently researching my family's history. If I find further monuments in the course of my researches, I would be pleased to add them to your database if that is helpful. I would be happy to contribute images of monuments to be found in my locality, and could send more details through a private message if you wish.