Mary was born in 1861 in Indiana. Her father was Mathew Miller, according to the death certificate posted on Find A Grave. 
Mary married John Harvey Brown in 1921. She was his second wife. At the time of her death, she was divorced. Her husband was listed as Brown, although her name was given as Mary Alice Allen. Her first husband had the surname of Allen.
She passed away in 1934. Burial was in the Crystal Lake Cemetery in Corvallis,
Benton County, Oregon.