Send a message to the person who requested a photo of the grave monument of John Callison with the following comment:
I have been researching my wife family tree who's maiden name is Callison since 2003 to prove that the Callison's came from Denmark. I have proved John Callison ancestors did come from Denmark, but need to find the family link to my wife's GG grandfather. Hopefully someone who is potential cousin may respond. Thank you for your help.