What records might that be?
Wayne C. Temple, "Ruth Stanton Recalls the Lincolns", The Lincoln Herald Vol. 92, Iss. 3.
Allen C. Guelzo, Abraham Lincoln: Redeemer President.
Kenneth J. Winkle, The Young Eagle: The Rise of Abraham Lincoln.
Mariah Vance, Lincoln's Unknown Private Life: An Oral History by His Black Housekeeper Mariah Vance 1850-1860, Walter Oleksy & Lloyd Ostendorf, eds.