Livingstone, David, 1813-1873. Letter to [John Kirk 2], 4 January 1858. Images copyright Billy Graham Center Archives, Wheaton College, Wheaton, Illinois. As relevant, copyright Dr. Neil Imray Livingstone Wilson. Creative Commons Attribution-NonCommercial 3.0 Unported (https://creativecommons.org/licenses/by-nc/3.0/).   