The Hosts of the Air — Joseph Altsheler

A young man was shaving. His feet rested upon a broad plank embedded in mud, and the tiny glass in which he saw himself hung upon a wall of raw, reeking earth. A sky, somber and leaden, arched above him, and now and then flakes of snow fell in the sodden trench, but John Scott went on placidly with his task. The face that looked back at him had been changed greatly in the last six months. The smoothness of early youth was gone - for the time - and serious lines showed about the mouth and eyes. His cheeks were thinner and there was a slight sinking at the temples, telling of great privations, and of dangers endured. But the features were much stronger. The six months had been in effect six years. The boy of Dresden had become the man of the trenches.