Lincoln writes to fellow veteran Eli C. Blankenship, who seeks information concerning David Rankin, who served under Lincoln in the Black Hawk War. Lincoln explains, "[Isaac Guliher] being an acquaintance of mine and belonging to the company in which Rankin wished to go wished to leave it and join mine . . . [I]t was agreed that they should exchange places and answer to each others names—as it was expected we all would be discharged in very few days. . . . The above embraces all the facts now in my recollection."Abraham Lincoln to Eli C. Blankenship, 10 August 1833, CW, 1:19; Ellen M. Whitney, ed., The Black Hawk War 1831-1832: Volume 1 Illinois Volunteers, Collections of the Illinois State Historical Library (Springfield: Illinois State Historical Library, 1970), 35:79, 96, 126, 176-178, 222, 224 .

[Muster roll of Lincoln's company shows that David Rankin transferred to foot company of Capt. Seth Pratt May 19, 1833, and on this day Isaac Gulihur transferred to Lincoln's company from Pratt's company.Photocopy.]

[James D. Henry files suit in the Sangamon County Circuit Court in Henry for use of McCandless and Emmerson v. Alley and Lincoln," seeking a judgment on a note given by Alley and Lincoln on October 30, 1832.Record.]