William H. Herndon, Lincoln's law partner, writes an assignment of errors in the appeal to the Illinois Supreme Court of the case of Brundage v. Camp, involving the sale of two mules. Herndon signs the document and he also signs for Lincoln. The two attorneys represent James A. Brundage in the case that had originated in the Sangamon County Circuit Court. The lower court ruled against Brundage, who then appealed to the Illinois Supreme Court. Assignment of Errors, 7 January 1858, Brundage v. Camp, Herndon-Weik Collection, Library of Congress, Washington, DC.