Send a message to the person who requested a photo of the grave monument of John Bowden with the following comment:
I believe this to be the gravestone of the brother of my 4xgreat grandfather, Salmon Bowden. However if it is, then the hints you have suggested are incorrect, and John is the son of John Bowden and Elizabeth, formerly Grey. Whatever - Bowdens in Liskeard in the Quaker faith will almost certainly be related! Thank your.