Oil! by Upton Sinclair

Bunny went up to Paradise for his Christmas holidays, and there was the first word from Paul; a plain card, bearing the stamp of the American Expeditionary Force, but no place; no picture postcard with "Scenes in Irkutsk" or "Camel-sleigh on the Volga," or anything like that! "Dear Ruth," it said: "Just a line to let you know that I am well and everything is all right. I have received three letters from you. Please write often. We are busy and I am having an interesting time. Give my love to all the family and to Bunny and Mr. Ross. Affectionately, Paul."

Ruth had had this treasure for several days, and there was no telling how many times she had read it, and studied every mark on both sides. It seemed to Bunny a cold and unsatisfactory note, but he did not say so to Ruth; he asked Dad about it, and Dad said there would necessarily be a great deal of censoring of soldier's mail, and Paul had probably written this bare message to make sure it got through. Why did there have to be so much censoring? Bunny asked; and Dad answered that these were ticklish times, and the army had to protect itself against enemy propaganda.