"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M8Q8-3FB : 9 November 2014), Martha C Cowan in household of Wade Cowan, Abbeville county, part of, Abbeville, South Carolina, United States; citing family 523, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MFST-PPZ : 17 October 2014), Martha C Cowin in household of Wade Cowin, Mississippi, United States; citing p. 6, family 31, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,249.
Find a Grave, database and images (https://www.findagrave.com : accessed 29 May 2020), memorial page for Martha Caroline “Mattie” Cowan Kerr (9 Jun 1846–23 May 1897), Find a Grave Memorial no. 62745038, citing Oakwood Cemetery, Corsicana, Navarro County, Texas, USA ; Maintained by James Coston (contributor 47251791) .
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