In "The Sniper" by Liam O'Flaherty, how is the enemy able to get a clear shot at the sniper?

The enemy sniper is able to get a clear shot at the sniper because the sniper exposes himself long enough to shoot the man in the armored car and the old woman. 

The sniper is a fairly brave man because he takes his two kill shots knowing that he is exposed to the enemy sniper.  The enemy sniper knows the protagonist's location because the "good guy" sniper gave away his position by smoking his cigarette....

The enemy sniper is able to get a clear shot at the sniper because the sniper exposes himself long enough to shoot the man in the armored car and the old woman. 

The sniper is a fairly brave man because he takes his two kill shots knowing that he is exposed to the enemy sniper.  The enemy sniper knows the protagonist's location because the "good guy" sniper gave away his position by smoking his cigarette.  The enemy sniper has already taken two shots at the sniper by the time the armored car and the old woman arrive.  The main sniper knows that he is outnumbered, so he decides to risk shooting the two people on the street.  He successfully kills both targets, but he gets shot in the arm by the enemy sniper.  

Suddenly from the opposite roof a shot rang out and the sniper dropped his rifle with a curse. The rifle clattered to the roof. The sniper thought the noise would wake the dead. He stooped to pick the rifle up. He couldn’t lift it. His forearm was dead. “I’m hit,” he muttered.