Nelson M. HOWARD

                   1880, Roane County, Tennessee Census
Lee, Sarah, 39, keeping house, TN, TN, SC
Nancy W., 17, daughter, TN, TN, TN
Howard, Jasper, 25, m. June, son-in-law, digging iron ore, TN, TN, TN
" Sarah E., 26, daughter, boarding, TN, TN, TN
ancestry.com image

1870 Roane County, Tennessee Census
69.  Howard, A, 40, F
- Jas, 15, M
- Jane, 13,
- Joe, 5, M

This could be Jasper with little sister Martha, since people sometimes changed middle names with given names.  They're the right age.  However, the mother, who has the wrong initial also, is 10 years too old.  So I think this Jasper in Roane County is not ours.
                  

                   1860 Census, Coffee County, TN
36.  Nelson Howard, 27, TN
    Caroline, 20, TN
    Jasper W., 5, TN
    Martha, 2, TN

Searched for family in 1870.  Unsuccessful.  September 2008 ancestry.com

Tennessee Marriages 1788 - 2002, ancestry.com
11 Sep 1873, Coffee County, Tennessee


1880 United States Federal Census
about James Myers
Name: 	James Myers
Home in 1880: 	District 12, Cannon, Tennessee
Age: 	26
Estimated Birth Year: 	abt 1854
Birthplace: 	Tennessee
Relation to Head of Household: 	Self (Head)
Spouse's Name: 	Marthey
Father's birthplace: 	Tennessee
Mother's birthplace: 	Tennessee
Neighbors: 	View others on page
Occupation: 	Farm Laborer
Marital Status: 	Married
Race: 	White
Gender: 	Male
Household Members:
Name 	Age
James Myers 	26
Marthey Myers 	24
Bettie Myers 	3
Robbert Myers 	1
Robbert Martin 	15

This census record may be them.  It isn't in Coffee County (they aren't, anyway).  The children are younger than expected.  The wife is younger, too, by 2 years, acceptable.