Goodspeed's History of SE Missouri pp. 1196-97 has information about Harriet Marsh and her first husband Henry Grymes. It indicated they had 3 children; Branden, Columbus and Martin Luther. Henry died at age 38 in 1859 and Harriet died in Pemiscot in 1875 at 43.
Henry Grymes Age in 1860: 32 Birthplace: Tennessee Home in 1860: Township 20 Range 13, Pemiscot, Missouri Post Office: Solitude
Household Members: Name Age Henry Grymes 32 Harriet Grymes 26 Braden Grymes 6 Martin F Grymes 3
Either one or both the census and Goodspeed are off on the ages but the rest seems to fit.