↑ Illinois, County Marriages, 1810-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QK9L-FV2D : 14 October 2017), Robert Greenlees and Mary Montgomery, 12 Apr 1861; citing Winnebago, Illinois, United States, county offices, Illinois; FHL microfilm 1,914,041.
Find A Grave: Memorial #71102438 Find A Grave, database and images (https://www.findagrave.com : accessed 08 October 2018), memorial page for Mary Montgomery Greenlees (12 Aug 1835–1915), Find A Grave Memorial no. 71102438, citing Riverside Cemetery, Charles City, Floyd County, Iowa, USA ; Maintained by Chris (contributor 46808630) .
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 DNA with Mary: