Mary was born in 1856 to William McCormick and his wife.
She was widowed in 1932. She later moved in with her daughter Williamina, according to Ruth.
Some family history might be found here: http://sites.rootsweb.com/~onwellin/pioneers/maccormick_william.htm
Mary's daughter Williamina died of complications during a gall bladder surgery on 18 July 1948, aged 58.
Find a Grave