She is on find-a-grave.

We know George E as a son of George from his presence in his father’s household in 1850 and 1860, from the biography of his father and from the obituary of his mother. He is designated P5a4b.

His death record said he was to be buried at Beech Grove where his mother, father and wife are also buried. When Alethea England went out to take photos (after my formal photo request on find-a-grave), she found that in the family plot there is a row with the graves of Susie E Mertz (wife of this George), Charles whose tombstone says he was the son of Geo E and S Mertz and who must have died young and was never listed on Census, and then a small stone with nothing but the initials G E M.

It is possible of course that that small stone is a marker for the father who is named on the large nearby obelisk but all logic suggests that marker is for the son, George.