"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMVV-1HD : accessed 7 January 2018), Mary Croarkin in household of Peter Croarkin, Milwaukee city Ward 4, Precintct 6, Milwaukee, Wisconsin, United States; citing enumeration district (ED) 31, sheet 15B, family 282, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,801.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKC4-RJ8 : accessed 7 January 2018), Mary J Croarkin in household of Peter P Croarkin, Chicago Ward 7, Cook, Illinois, United States; citing enumeration district (ED) ED 431, sheet 6B, family 143, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 248; FHL microfilm 1,374,261.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJQ1-8CL : accessed 7 January 2018), Mary J Croarkin in household of Peter P Croarkin, Chicago Ward 25, Cook (Chicago), Illinois, United States; citing ED 1416, sheet 2A, line 30, family 27, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 341; FHL microfilm 1,820,341.
"Illinois, Cook County Deaths, 1878-1994," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2MZ-4J1B : 17 May 2016), Mary Croarkin in entry for Peter P Croarkin, 12 Oct 1929; citing Chicago, Cook, Illinois, United States, source reference , record number , Cook County Courthouse, Chicago; FHL microfilm
Repositories:
The Church of Jesus Christ of Latter-day Saints, "Pedigree Resource File," database, FamilySearch (https://familysearch.org/ark:/61903/2:2:SRXX-W8X : accessed 2018-01-07), entry for Mary Joseph /Moss/.
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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.
Mitochondrial DNA test-takers in the direct maternal line: