Send a message to the person who requested a photo of the grave monument of John George Donner with the following comment:
Hi, I believe that John Donner is the father of John Donner who married Grace Wilson. John and Grace's son is my Great Great Grandfather. I believe that John Donner whose gravestone is in the photograph is my Great, Great, Great, Great Grand Father. Thank you. Regards, Lyrae Lehtonen