Mayflower ancestry of Elizabeth Ely Goodrich has her birth date as July 12, 1880. Findagrave has July 11, 1880.
From the San Francisco Call, April 12. 1909, page 13:
"Bacon -- At El Quito [now part of Saratoga], Santa Clara county, Cal., April 11, 1909, Bertha Shafter Goodrich, wife of Edward L. Bacon, and daughter of Edward W. and Sara S. Goodrich, in the twenty-ninth year of her age."
Source note: Additional information from the California Death Index.