I glanced at my watch. Only three hours had gone by. My hands were numb from the cold, and I was hungry. I thought of a dining car, and almost laughed out loud because the idea seemed so absurd. When I pulled a bar of American chocolate out of my pocket and unwrapped the silver wrapping, an electric shock ran through the vestibule. The other passengers eyed my chocolate openly and hungrily. I felt suddenly embarrassed. There wasn’t enough to pass around, so I slid the rest of the bar back into my overcoat pocket.