The image originates from the United States, adding to its historical significance and authenticity, providing a tangible connection to the conflict that shaped the nation's destiny. He was the first Union officer to be killed. He had seen a Confederate flag flying from an inn in Alexandria, VA and went there. He climbed into the attic and then the roof and removed the flag.
While coming down the stairs the innkeeper shot him dead. He had been a law student and protege of Lincoln in Springfield so his death was a personal tragedy for the Lincoln family.