Liam O'Flaherty composes his short story "The Sniper" from the point of view of a third-person narrator. This narrator, however, has a limited perspective, for he looks and speaks through the lens of the Republican sniper who lies on a rooftop waiting for a target.
It is through the eyes of the sniper that we watch the action unfold. The narrator tells us what the sniper feels: hungry for instance, desirous of a cigarette, and, later, in pain when he is hit by a bullet from another sniper. The narrator also tells us what the sniper sees as the armored car pulls up and the woman (an informant) speaks with a man from the car. The sniper kills them both, and we watch him do so, for again, the narrator focuses in on the sniper.
As the story continues, the narrator also continues to focus in on the sniper, describing how he tends his injury and what he feels while doing so. Then we listen as the narrator explains the sniper's plan to catch his fellow sniper. The plan is successful. The other sniper, thinking that his Republican counterpart is dead, dares to look out, and the Republican sniper kills him immediately.
Then the narrator details the sniper's reaction to his "victory." At first, he yells for joy, but then the "lust of battle died in him" and he feels remorse. He is revolted by what he has done, and he curses. Notice how the narrator has access to the sniper's innermost thoughts and feelings here. Yet the narrator does not provide a description of anything the sniper feels or does when he looks at the body of the dead sniper and realizes that the man is his own brother. We readers are left to imagine that for ourselves.