Thomas C. W. Sale to Abraham Lincoln, 14 December 1858 (Campaign Digital Edition)
Hopkins, Hayes, Palmer & Company to Lincoln & Herndon, 16 December 1858 (Campaign Digital Edition)
Benjamin F. Ayer to Abraham Lincoln, 17 December 1858 (Campaign Digital Edition)
Abraham Lincoln to John Cole and A Little One Wall, 21 January 1859 (Campaign Digital Edition)