Remembering Abraham Lincoln

Recommended reading:
Abraham Lincoln and Chicago from the Lincoln Institute.
Abraham Lincoln; the Tribute of a Century, 1809-1909: Commemorative of the Lincoln Centenary and Containing the Principal Speeches Made in Connection Therewith
By Nathan William MacChesney (1910) The first chapter is a detailed account of the Chicago Commemoration of Lincoln's 100th birthday.
The influence of Illinois in the development of Abraham Lincoln by William E. Barton (1922)
Letter written by Manley Stacy during the days of the Battle of Gettysburg (from Marty Hackl; Marty's Blog)