The Life of Abraham Lincoln. Vol. 2. Chicago, IL: Janses, McClurg, & Company. p. 81.

^ Harris 2007, pp. 55–57.

^ Donald 1996, p. 96.

^ Donald 1996, pp. 105–106, 158.

^ Donald 1996, pp. 142–143.

^ McGinty, Brian (February 9, 2015). Lincoln's Greatest Case: The River, the Bridge, and the Making of America. W. W. Norton & Company. ISBN 978-0-87140-785-6.

^ "Abraham Lincoln's Patent Model: Improvement for Buoying Vessels Over Shoals". Smithsonian Institution. Archived from the original on August 25, 2017. Retrieved April 28, 2017.

^ Richards 2015, p. 440.

^ Donald 1996, pp. 155–156, 196–197.

^ Library, Philosophical (November 9, 2010). The Wisdom of Abraham Lincoln. Open Road Media. ISBN 978-1-4532-0281-4.

^ Jump up to: a b c Donald 1996, pp. 150–151.

^ Harrison 1935, pp. 280–286, 350–351.

^ Harrison 1935.

^ Mitgang, Herbert; Times, Special To the New York (February 10, 1989). "THE LAW; Lincoln as Lawyer: Transcript Tells Murder Story". The New York Times. ISSN 0362-4331. Retrieved November 13, 2022.

^ White 2009, pp. 175–176.

^ White 2009, pp. 182–185.

^ White 2009, pp. 188–190.

^ Thomas 2008, pp. 148–152.

^ Graebner 1959, p. 255.

^ Jump up to: a b White 2009, pp. 203–205.

