↑ "United States Census, 1850," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MCDV-VTN : 12 April 2016), Mary King in household of Spencer I King, Hickman county, Hickman, Tennessee, United States; citing family 764, 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/pal:/MM9.1.1/MDDH-774 : 12 April 2016), Mary Jane Blackwell in household of Cornelias J Blackwell, Tennessee, United States; citing p. 23, family 158, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 553,038.
↑ "United States Census, 1880," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MFJW-ZS9 : 15 July 2017), Mary Blackwell in household of Jackson Blackwell, Precinct 4, Parker, Texas, United States; citing enumeration district ED 137, sheet 435A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 1323; FHL microfilm 1,255,323.