Thank you for the hint. I travelled to Rices Mills and the Jackman cemetery. Found Levi's headstone, photographed it and uploaded it to Find A Grave. The inscription is illegible and brief. I had to find his name with my fingers after which I could barely read it. It starts (3 lines) "In memory of Levi Parker", I could not make out the next two lines, I imagine they are a simple date of death.
Rices Mills is an interesting place, I could find no humans there - even at the farmers whose field the cemetery is in. I stopped at quite a few houses in my search - no people.
There are three other Parker headstones visible, George, his daughter Hattie (his wife is missing) and a civil war vet. All of these have been loaded onto Find-a-Grave. They are all next to one another as though a family group.