I found Mary in the 1870 census and her death certificate is on file in NC. Off the top of my head, She died in the mid 20's. Since Jeremiah went to MO, Gideon apparently went and returned as evidenced by the 1870 census. Where and when did He die?
ps. How do we count Travis and Murphy? They were living with Barbara And Her Father in 1850 before the marriage.