"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M8BH-3P4 : accessed 21 March 2016), Mary Hartman in household of Riley H Hartman, New Hampton, Chickasaw, Iowa, United States; citing sheet 12A, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,482.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/KMTN-4HT : accessed 21 March 2016), Mary Hartson in household of R H Hartson, New Hampton, New Hampton Township, Chickasaw, Iowa, United States; citing enumeration district (ED) 19-14, sheet 2B, family 38, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 1147.
"Iowa, County Births, 1880-1935", database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XVNK-8LY : accessed 21 March 2016), Mary Morton in entry for Pearl Morton Hartson, 1909.
"Iowa State Census, 1925," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/QKQ4-VQXT : accessed 21 March 2016), Mary Hartson in household of R H Hartson, Nashua Corp-Utica, Chickasaw, Iowa, United States; citing Iowa State Historical Department, Des Moines; FHL microfilm 1,429,267.
"United States Census, 1930", database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XMNG-FML : accessed 21 March 2016), Mary Harlson in entry for R H Harlson, 1930.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/ML16-24K : accessed 21 March 2016), Mary Hartson in household of Ira Morton, New Hampton, Chickasaw, Iowa, United States; citing enumeration district (ED) ED 47, sheet 6B, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,409.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M92Z-KL1 : accessed 21 March 2016), Mary Morton in household of Ira Morton, New Hampton Township New Hampton town, Chickasaw, Iowa, United States; citing sheet 1A, family 3, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,424.
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DNA Connections
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 some percentage of DNA with Mary: