Josiah Lamborn, Abraham Lincoln and John Dougherty to the Illinois House of Representatives, 25 January 1845 (Congressional Digital Edition)

Abraham Lincoln to Junius Hall, 3 September 1848 (Congressional Digital Edition)

Carson D. Hay to Abraham Lincoln, 24 May 1858 (Campaign Digital Edition)

Carson D. Hay to Abraham Lincoln, 26 May 1858 (Campaign Digital Edition)

Ephraim H. E. Jameson to Abraham Lincoln, 26 May 1858 (Campaign Digital Edition)

Charles J. Peckham to Abraham Lincoln, 9 June 1858 (Campaign Digital Edition)

William Kellogg to Abraham Lincoln, 26 July 1858 (Campaign Digital Edition)

Abraham Lincoln to Gustave P. Koerner, 6 August 1858 (Campaign Digital Edition)