Send a message to the person who requested a photo of the grave monument of Mary Jackson with the following comment:
Hi Graham, I can help a bit. The John JACKSON (1733-1797) referred to is on my web site: (but I gather I cannot give you the link. It is in a page called the JACKSONs of Doncaster, on my web site called The Silver Bowl). I am grateful for the work that you do, and hope that I can complement it.Sharon PS Please let me know if it can be shared online with credit to yourself given.