I found a John Mathenia living in St. James, Mississippi, MO in the online 1880 census. Male, W, 26, farmer, single, born in TN. I did not find a Mathenia when I did a search in TN in the online 1880 census. James Mathenia was not listed in the cemetery inscriptions for Dyer County, TN. People frequently moved back and forth across the Mississippi. I will check the Pemiscot County, MO cemetery inscriptions next week at the Archives. Carolyn