alva duvall born 1837

Am looking for information on Alva Duvall.
Born 1837. He married Rohama Thomas in 1863.
They had two sons- Ira and John Hardin. One
daughter. Mary Alva. I know that he was in
the Crete, Nebraska area in 1870. Any
information about where in the world I came
from would be greatly appreciated. Please
e-mail atlowjo@webtv.netThank you. Lowell
Duvall