Mary was born about 1819. Mary Chastain ... She passed away after 1870. 
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↑ First-hand information as remembered by Danny Rollins, Sunday, March 8, 2015. Replace this citation if there is another source.
"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHJR-5TX : 12 April 2016), Mary M Chastine in household of Isaac Chastine, Mitcheltree, Martin, Indiana, United States; citing family 26, 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:M466-84G : 12 April 2016), Mary M Rollins in household of Sidney C Rollins, Missouri, United States; citing p. 56, family 385, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,285.
"Indiana Marriages, 1811-2007," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VRQW-H2Z : 10 December 2017), Sidney Rollins and Mary Magdaline Chastian, 19 Mar 1848; citing Martin, Indiana, United States, various county clerk offices, Indiana; FHL microfilm 1,316,952.
It may be possible to confirm family relationships with Mary 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 Mary: