Capt. Lincoln's company is mustered out of U.S. service by Nathaniel Buckmaster, Brigade major.John G. Nicolay and John Hay, Abraham Lincoln: A History, 10 vols. (New York: Century, 1890), 1:96.

Lincoln writes muster roll of his company, certifying that remarks on activities of several members are accurate and just.ISLA—Photocopy.

He then enrolls in company of Capt. Elijah Iles for service in 20-day regiment. Muster Rolls, Black Hawk War Collection, Abraham Lincoln Presidential Library and Museum, Springfield, IL.