Elizabeth Keckley 
Behind the Scenes: or, Thirty years a slave, and Four Years in the White House [EPUB ebook] 

Elizabeth Hobbs Keckley (sometimes spelled Keckly; February 1818 – May 1907) was a former slave who became a successful seamstress, civil activist and author in Washington, DC. She was best known as the personal modiste and confidante of Mary Todd Lincoln, the First Lady.