Send a message to the person who requested a photo of the grave monument of John Oswald Earp with the following comment:
I am from Melbourne Derbyshire doing research on the Dower House there. It was formerly the home of the Earp family, and John Oswald Earp was born there in 1864. A google search took me to your page, and it looks as though this could be the same person as on the gravestone.