"Michigan Births, 1867-1902," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:NQ8D-L72 : 12 August 2019), Mary Louise Cornwell, 01 Jun 1887; citing item 2 p 179 rn 489, Washington, Sanilac, Michigan, Department of Vital Records, Lansing; FHL microfilm 2,321,091.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9BV-16J : accessed 24 November 2020), Mary Cornwell in household of Wesley Cornwell, Washington township Carsonville village, Sanilac, Michigan, United States; citing enumeration district (ED) 138, sheet 12A, family 251, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,743.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLTS-17F : accessed 24 November 2020), Mary Cornwell in household of Charles Cornwell, Washington, Sanilac, Michigan, United States; citing enumeration district (ED) ED 155, sheet 4B, family 96, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 765; FHL microfilm 1,374,688.
Mary Cornwell in the record of Albert Colen Campbell "Michigan Marriages, 1868-1925," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:N3K6-SNQ : 9 November 2020), Albert Colen Campbell and Mary Cornwell, 19 Oct 1910; citing Marriage, Croswell, Sanilac, Michigan, , Citing Secretary of State, Department of Vital Records, Lansing; FHL microfilm 4209146.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZ78-226 : accessed 24 November 2020), Mary Campbell, Croswell, Sanilac, Michigan, United States; citing ED 141, sheet 7A, line 26, family 149, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 796; FHL microfilm 1,820,796.
Mary Cornwell Campbell in the record of William D. Dunsmore "Michigan Marriages, 1822-1995", database, FamilySearch (https://familysearch.org/ark:/61903/1:1:FCC3-266 : 17 January 2020), Mary Cornwell Campbell in entry for William D. Dunsmore, 1926.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X7MH-NQQ : accessed 24 November 2020), Mary L Dunsmore in household of William Dunsmore, Port Huron, St Clair, Michigan, United States; citing enumeration district (ED) ED 32, sheet 16B, line 75, family 363, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1025; FHL microfilm 2,340,760.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K412-VNW : 2 June 2020), Mary L Dunsmore in household of William D Dunsmore, Amadore, Worth Township, Sanilac, Michigan, United States; citing enumeration district (ED) 76-40, sheet 10A, line 30, family 206, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 1818.
Acknowledgements
WikiTree profile Cornwell-313 created through the import of Sanders Family_2012-08-01.ged on Aug 1, 2012 by Larry Sanders.
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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 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 some percentage of DNA with Mary: