"Recensement du Canada de 1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QV9R-8FH2 : 16 March 2018), Margret O'Grady in entry for Edmund O'Grady, 1911; citing Census, Halifax Sub-Districts 29-92, Nova Scotia, Canada, Library and Archives of Canada, Ottawa, Ontario; FHL microfilm 2,417,685.
"Nova Scotia Marriages, 1907-1932," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVBK-QC6J : 3 March 2021), Alexander Roy Couper and Margaret Lillian O'Grady, 11 Apr 1928; citing Halifax Nova Scotia, , Nova Scotia, Canada, p. , Nova Scotia Archives, Halifax, Nova Scotia.
Find a Grave, database and images (https://www.findagrave.com : accessed 08 March 2021), memorial page for Margaret L Couper (9 Apr 1903–21 Jun 1967), Find A Grave: Memorial #204526544, citing Mount Olivet Cemetery, Halifax, Halifax County, Nova Scotia, Canada ; Maintained by Michael Proctor (contributor 49073234) .
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