Grandmother Florence Cook

We are looking for information on Florence Cook;
Grandma said she was born in Schuyler county Iowa/Missouri?
Accordingto what litte information I have her Father was
Grayson Cook, Mother was Ammie Potter.She married John Newton Poindexter April 11, 1886, She had one sister that I
kwew about, Mary married Underhill, lived in California
If you can helpplease e-mail