1. The document is a short story written by Irish author Liam O'Flaherty about a republican sniper during the Irish Civil War in June 1922. 2. As the sniper lies wounded on a rooftop, he kills the enemy sniper and car that spot him. When he goes to identify the dead body of the enemy sniper, he discovers it is his own brother. 3. The story highlights the human cost of civil war through the tragic moment when the sniper realizes he has killed his own brother.