Winslow Homer, _The Army of the Potomac --A Sharpshooter on Picket Duty_, 1862, wood engraving on paper, 23.2 x 35.1 cm, illustration in _Harper 's Weekly_, November 15, 1862 (Smithsonian American Art Museum). Speakers: Sarah Alvarez and Dr. Kimberly Kutz Elliott.
License: CC BY-NC-SA by Khan Academy