Martha Davis was born 2 September 1833 in Missouri, a daughter of Thomas and Zilpha Davis who were married in Tennesse on 18 December 1817 per Thomas Davis Family Bible record

1840 Missouri, Gasconade County - Federal Census
Davis, Thomas
Males 40/50 1 (Thomas Davis)
Females under 5 1 (Lumima Davis)
Females 5/10 1 (Martha Davis)
Females 10/15 1 (Nancy Davis)
Females 40/50 1 (Zilphia Davis)

Home in 1850: Osage Co, Jefferson MO
Davis, Thomas, 52, male, TN
Davis, Martha, 16, female, MO
Davis, Jemima, 10, female, MO
Wilson, Zilpa, 4, female, MO
McQueen, Maria, 3, female, MO
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Martha Davis and George D. Smith were married April 5, 1855 in Osage County, Missouri
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1860 Missouri, Maries County, Boone Township, P.O.: Lacon - Federal Census
Smith, George D. 39 m Farmer Real Estate: $1150 Personal $500 VA
Smith, Martha 26 f MO
Smith, Rachel 3 f MO
Smith, Philip 51 m Farm Laborer Personal $200 VA
Willson, Zilphia 14 f MO

Home in 1870: Dry Creek, Maries, Missouri
House 2-65
Post Office: Clifty Dale
Geo D Smith 49 m/w farmer VA
Martha Smith 33 f/w MO
Rachal Smith 14 f/w MO
Thos Smith 10 m/w MO
Jas W Smith 7 m/w MO
*Philip J Smith 62 m/w MO [VA?]

1880 Texas, Collin County, Precinct 4 - Federal Census
Smith, George D. w m 60 M Farmer VA VA VA
Smith, Martha w f 46 Wife M Keeping House MO TN TN
Smith, Thomas w m 18 son S Farmer MO VA MO
Smith, James W. w m 17 Son S Farmer MO VA MO
Hendicott, Rachel w f 23 Daughter M Keeping House MO VA MO
Hendicott, Girtrue w f 1 Grand Daughter S TX -- MO

Date of Martha Smiths' death and burial have not been found. Her Husband George D. Smith was listed as widowed on 1900 Census
Home in 1900: Fort Worth Ward 3, Tarrant, Texas
Geo D. Smith 80 1820 m w wd MO MI MI
T J Smith 36 son 1863 sgl MO MO MO Bartender
R Cassidy 40 dau Jun 1859 sgl MO

Son
Thomas J. "Tom" Smith