Mamie Pleasant was an eEntrepreneur  who participated in the Underground Railroad and helped many slaves make their way to freedom in the north.  As a result of her work, she has been called The Mother of Human Rights in California.  The Abolitionist used an inheritance from her husband, to fund the cause of Black freedom and to amass a $30 million fortune in stocks and real estate.  A Mamie Pleasant autograph is a wonderful financial memento.