1862年在马里兰州安提耶坦 (Antietam) 地区运行任务时的马上英姿

出处: Gardner, Alexander, photographer. "Antietam, Maryland. Allan Pinkerton ("E. J. Allen") of the Secret Service on Horseback." September 1862. Selected Civil War Photographs, 1861-1865. American Memory collections, Library of Congress.