"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNCN-NSB : 12 April 2016), M E Grier in household of T J Shannon, Arkansas, United States; citing p. 6, family 42, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 545,565.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNWT-HR1 : 12 August 2017), Michal E Greer in household of Jaems W Greer, Vineyard, Washington, Arkansas, United States; citing enumeration district ED 213, sheet 664B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0059; FHL microfilm 1,254,059.
Marriage License : "Tennessee Marriages, 1796-1950." Database. FamilySearch. http://FamilySearch.org : 14 June 2016. Index based upon data collected by the Genealogical Society of Utah, Salt Lake City. Indexing Project (Batch) Number--M51984-1--System Origin Tennessee-ODM--GS Film number 455557
It may be possible to confirm family relationships with Michael 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 DNA with Michael: