2011 biography from LSU Press mentions Sarah Stanley Grimke

A More Noble Cause: A. B. Tureaud and the Struggle for Civil Rights in Louisiana by Rachel Loraine Emanuel is the most recent book to mention Sarah Stanley Grimke.  As usual, the reference is to her daughter and husband, and only briefly to Sarah; Angelina’s acquaintance with the Civil Rights leader is the cause for her inclusion in the book. In printed books  she’s a sad footnote in the lives of her husband and daughter, perhaps also a victim of her father’s religious and racial intolerance, in every available account.  Placing her at the center of her own life story is a challenge that will require getting back to her own words, in her letters as well as in her published writings.