The man had fallen at the first volley, and the fight had swung past him.

And now he rose, and stole hastily on his moonlit way.

Injun watched solemnly.

He had no mind to give a warning, and probably get shot for his pains.

He might even have admired the trick, if he had not had a closer view of the runaway, who was Henry Dorgan.
When Injun discovered this, he was solemn no longer.