Malvina French Harlan, née Shanklin, married John M. Harlan, a lawyer and politician in 1856.
In 1915 she wrote a memoir, Some Memories of a Long Life, 1854-1911. She is referred to in JW's correspondence about 1895.
Harlan, M. F., 'Supreme Court Justice's life through the eyes of his wife,' Centre College, Danville, KY, at http://www.centre.edu (accessed September 2004); Shanklin Harlan, M., Some Memories of a Long Life, 1854-1911, L. Przybyszewski (ed.), New York, 2002.