In Lyons v. Hill et al., assumpsit suit in Circuit Court, defendants default and Lincoln & Herndon secure damages of $440.66 for plaintiff. Record.

Lincoln writes, signs, and files with Supreme Court clerk assignment of errors in Smith & Dunlap v. Dunlap. Herndon-Weik Collection, Library of Congress, Washington, DC.

In Supreme Court Blackwell begins argument for plaintiffs in Compher et al. v. People. Stuart follows for defendants. In afternoon Lincoln continues for defendants and is followed by Purple for plaintiffs. Arguments take up entire day. Record.

William Wallace, Lincoln's third son, is born. Family Record in Abraham Lincoln's Bible, 4 November 1842 - 4 April 1853, CW, 1:304.

Lincoln writes reply to assignment of errors and agreement on motions in lower court in Whitecraft et al. v. Vandeveer (SC). Herndon-Weik Collection, Library of Congress, Washington, DC.

In Supreme Court, Bushnell commences plaintiffs' argument in Smith & Dunlap v. Dunlap. He is followed by Williams for defense. Case involves note of Dunlap for $131,480.52, payable in State of Illinois indebtedness, held by assignees of Bank of Illinois. Lincoln is one of plaintiffs' counsel. Record.

Williams continues for defendant in Smith & Dunlap v. Dunlap. Logan follows for defendant. Question at issue is whether Dunlap should pay face value of note or market value of $131,480.52 of state securities at time of note's maturity. Record.

Logan resumes his argument in Smith & Dunlap v. Dunlap. Lincoln concludes for plaintiffs. Court later affirms decision of lower court, which held Dunlap liable only for market value, which Judge David Davis set at $38,361.93. Record; 12 Ill., 184.

Lincoln writes assignment of errors in Webster & Huntington v. French et al. (Supreme Court). In Sangamon Circuit Court case of Alton & Sangamon RR v. Burkhardt, he writes and files, for plaintiff, praecipe and bond. Herndon-Weik Collection, Library of Congress, Washington, DC.

At year end balance of books at Robert Irwin's bank, Lincoln is debited $15 for "profit & loss," and pays $3.09 cash "for balance." Irwin Journal and Ledger.