Send a message to the person who requested a photo of the grave monument of Justin Macer-Wright with the following comment:
As a boy I was acquainted with Justin and Birgit, and with David their son (who stayed some time with us under the parental roof). David is a second cousin of mine, I may try to regain contact with him. I have a large family tree, details such as you offer add interest and authenticity - for which Many Thanks !!