Livingstone, David, 1813-1873. Letter to John Washington, 4 February 1860, and Copy with Additions of Letter to William E.A. Gordon, 3 November 1859. Images copyright National Museum of the Royal Navy. Creative Commons Attribution-NonCommercial 3.0 Unported (https://creativecommons.org/licenses/by-nc/3.0/). As relevant, copyright Dr. Neil Imray Livingstone Wilson. Creative Commons Attribution-NonCommercial 3.0 Unported (https://creativecommons.org/licenses/by-nc/3.0/). 