"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHVR-Y6H : 17 October 2014), Eliza Cross in household of Wm D Cross, Alabama, United States; citing p. 11, family 76, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 545,504.
"Alabama County Marriages, 1809-1950," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKZS-SW6K : 21 July 2015), J.P. Durham and Eliza P. Cross, 15 Sep 1872; citing Calhoun, Alabama, United States, county courthouses, Alabama; FHL microfilm 1,035,494.
It may be possible to confirm family relationships with Eliza by comparing test results with other carriers of her ancestors' 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 Eliza: