Six photographs of Abraham Lincoln from the collection of the Chicago Historical Society taken over the span of 17 years show how the demands of the presidency transformed Lincoln's once boyish face into a countenance lined with concern for the nation's future.
From left to right, top to bottom:
(1) 1848, Washington, D.C, photographer unknown
(2) February 28, 1857, Chicago, IL, Photograph by Alexander Hesler
(3) 1860, Springfield, IL, photograph by Christopher S. German
(4) February 9, 1861, Springfield, IL, photograph by Christopher S. German, ICHi 11408
(5) 1863, Washington, D.C., photographer unknown
(6) April 10, 1865, Washington, D.C., photograph by Alexander Gardner