I found Joseph and Elizabeth Henry in Texas in 1880.
1880 Texas, Lamar County, ED 77, page 104 12 12 Joseph Henry, 50, Farmer, Tenn, Tenn, Tenn Eliza, 34, Wife, Keeping House, Eng, Eng, Eng John W., 15, Son, at home, Mary F., 12, Daughter, at home R.E., 10, daughter, at home Ida H., 8, daughter RL, 6, daughter, E.C., 4, daughter.
All of the children were listed as being born in Missouri, with parents born in Tennessee and England.
I believe that Joseph "Conn" is also listed in the 1880 census:
Lamar County, ED 76, page 92 Henry, J. Com, 19, Laborer, Farm Laborer, Mo (parents birth places left blank).
He is listed in the household of James A. Faison, dwelling 249.
Good luck with your search! Karen It appears that Emma was born in Missouri and Charles and Jessie were born in Texas.