when was he born ?? If she is buried next to him u must know her age also. This is confusing. which follows:: amultimately looking for his wife's grave as well. She is Mary Campbell Stewart and is buried next to him. I know almost nothing about her. I would be incredibly grateful if someone could look this one up for me or give me a hint of how to find this. Hugh Stewart of Wills Twp., Guernsey County, OH (originally) or Newark, Licking County, OH. Died 17 Jul 1890 and buried at Gibson's cemetery near Wills Twp. I am ultimately looking for his wife's grave as well. She is Mary Campbell Stewart and is buried next to him. I know almost nothing about her.