A Yankee in the Trenches by Robert DerHolmes

Late in the summer I accumulated a nice little case of trench fever.

This disease is due to remaining for long periods in the wet and mud, to racked nerves, and, I am inclined to think, to sleeping in the foul air of the dugouts. The chief symptom is high temperature, and the patient aches a good deal. I was sent back to a place in the neighborhood of Arras and was there a week recuperating.