"California Death Index, 1940-1997," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VGTV-HQ3 : accessed 19 July 2015), Downing in entry for Charles Oliver Cox, 31 Dec 1952; Department of Public Health Services, Sacramento.
"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4X8-ZXW : 12 April 2016), John S Cox, Missouri, United States; citing p. 14, family 103, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,263.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNWG-VST : 12 August 2017), John Cox, Mountain, Scott, Arkansas, United States; citing enumeration district ED 170, sheet 377C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0056; FHL microfilm 1,254,056.
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DNA Connections
It may be possible to confirm family relationships with Sarah by comparing test results with other carriers of her mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Sarah: