Margaret was born in 1856. She passed away in 1891.
Sources
Find A Grave, database and images (https://www.findagrave.com : accessed 20 October 2018), memorial page for Margaret A. Morse O'Neill (1856–1891), Find A Grave Memorial no. 135369630, citing Woodlawn Cemetery, Winona, Winona County, Minnesota, USA ; Maintained by None to be Forgotten (contributor 47261370) .
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