[Mary has a step-daughter "Lizzie Caldwell", age 30, born May 1870, Missouri, living with her and her two daughters in the 1900 US Census, Tulare County, California. The birth year is obviously in error, since Lizzie's mother would be Elizabeth, who died in Feb 1869.]
The obituary of her half-sister Sallie Bowman McDonald on 10 Jul 1910 states that she is survived by two sisters, Mrs. M.B. Caldwell, of Lindsay, California, and Mrs. H.B. Coffey of Knob Noster, [Johnson County, Missouri.].