Abraham Lincoln to Samuel R. Lowry, 17 August 1850 (Campaign Digital Edition)
Nicholas H. Ridgely to Abraham Lincoln, 14 April 1856 (Campaign Digital Edition)
Abraham Lincoln to Orville H. Browning, 15 December 1856 (Campaign Digital Edition)
Abraham Lincoln to Usher F. Linder and Henry P. H. Bromwell, 13 January 1858 (Campaign Digital Edition)